deptandashboard /wp-includes/capabilities.php

Language PHP Lines 1375
MD5 Hash 4f00f740078520fe1045917346863ab1 Estimated Cost $16,272 (why?)
Repository https://bitbucket.org/aqge/deptandashboard View Raw File View Project SPDX
   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
<?php
/**
 * WordPress Roles and Capabilities.
 *
 * @package WordPress
 * @subpackage User
 */

/**
 * WordPress User Roles.
 *
 * The role option is simple, the structure is organized by role name that store
 * the name in value of the 'name' key. The capabilities are stored as an array
 * in the value of the 'capability' key.
 *
 * <code>
 * array (
 *		'rolename' => array (
 *			'name' => 'rolename',
 *			'capabilities' => array()
 *		)
 * )
 * </code>
 *
 * @since 2.0.0
 * @package WordPress
 * @subpackage User
 */
class WP_Roles {
	/**
	 * List of roles and capabilities.
	 *
	 * @since 2.0.0
	 * @access public
	 * @var array
	 */
	var $roles;

	/**
	 * List of the role objects.
	 *
	 * @since 2.0.0
	 * @access public
	 * @var array
	 */
	var $role_objects = array();

	/**
	 * List of role names.
	 *
	 * @since 2.0.0
	 * @access public
	 * @var array
	 */
	var $role_names = array();

	/**
	 * Option name for storing role list.
	 *
	 * @since 2.0.0
	 * @access public
	 * @var string
	 */
	var $role_key;

	/**
	 * Whether to use the database for retrieval and storage.
	 *
	 * @since 2.1.0
	 * @access public
	 * @var bool
	 */
	var $use_db = true;

	/**
	 * Constructor
	 *
	 * @since 2.0.0
	 */
	function __construct() {
		$this->_init();
	}

	/**
	 * Set up the object properties.
	 *
	 * The role key is set to the current prefix for the $wpdb object with
	 * 'user_roles' appended. If the $wp_user_roles global is set, then it will
	 * be used and the role option will not be updated or used.
	 *
	 * @since 2.1.0
	 * @access protected
	 * @uses $wpdb Used to get the database prefix.
	 * @global array $wp_user_roles Used to set the 'roles' property value.
	 */
	function _init () {
		global $wpdb, $wp_user_roles;
		$this->role_key = $wpdb->prefix . 'user_roles';
		if ( ! empty( $wp_user_roles ) ) {
			$this->roles = $wp_user_roles;
			$this->use_db = false;
		} else {
			$this->roles = get_option( $this->role_key );
		}

		if ( empty( $this->roles ) )
			return;

		$this->role_objects = array();
		$this->role_names =  array();
		foreach ( (array) $this->roles as $role => $data ) {
			$this->role_objects[$role] = new WP_Role( $role, $this->roles[$role]['capabilities'] );
			$this->role_names[$role] = $this->roles[$role]['name'];
		}
	}

	/**
	 * Add role name with capabilities to list.
	 *
	 * Updates the list of roles, if the role doesn't already exist.
	 *
	 * The capabilities are defined in the following format `array( 'read' => true );`
	 * To explicitly deny a role a capability you set the value for that capability to false.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param string $role Role name.
	 * @param string $display_name Role display name.
	 * @param array $capabilities List of role capabilities in the above format.
	 * @return null|WP_Role WP_Role object if role is added, null if already exists.
	 */
	function add_role( $role, $display_name, $capabilities = array() ) {
		if ( isset( $this->roles[$role] ) )
			return;

		$this->roles[$role] = array(
			'name' => $display_name,
			'capabilities' => $capabilities
			);
		if ( $this->use_db )
			update_option( $this->role_key, $this->roles );
		$this->role_objects[$role] = new WP_Role( $role, $capabilities );
		$this->role_names[$role] = $display_name;
		return $this->role_objects[$role];
	}

	/**
	 * Remove role by name.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param string $role Role name.
	 */
	function remove_role( $role ) {
		if ( ! isset( $this->role_objects[$role] ) )
			return;

		unset( $this->role_objects[$role] );
		unset( $this->role_names[$role] );
		unset( $this->roles[$role] );

		if ( $this->use_db )
			update_option( $this->role_key, $this->roles );
	}

	/**
	 * Add capability to role.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param string $role Role name.
	 * @param string $cap Capability name.
	 * @param bool $grant Optional, default is true. Whether role is capable of performing capability.
	 */
	function add_cap( $role, $cap, $grant = true ) {
		$this->roles[$role]['capabilities'][$cap] = $grant;
		if ( $this->use_db )
			update_option( $this->role_key, $this->roles );
	}

	/**
	 * Remove capability from role.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param string $role Role name.
	 * @param string $cap Capability name.
	 */
	function remove_cap( $role, $cap ) {
		unset( $this->roles[$role]['capabilities'][$cap] );
		if ( $this->use_db )
			update_option( $this->role_key, $this->roles );
	}

	/**
	 * Retrieve role object by name.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param string $role Role name.
	 * @return object|null Null, if role does not exist. WP_Role object, if found.
	 */
	function get_role( $role ) {
		if ( isset( $this->role_objects[$role] ) )
			return $this->role_objects[$role];
		else
			return null;
	}

	/**
	 * Retrieve list of role names.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @return array List of role names.
	 */
	function get_names() {
		return $this->role_names;
	}

	/**
	 * Whether role name is currently in the list of available roles.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param string $role Role name to look up.
	 * @return bool
	 */
	function is_role( $role )
	{
		return isset( $this->role_names[$role] );
	}
}

/**
 * WordPress Role class.
 *
 * @since 2.0.0
 * @package WordPress
 * @subpackage User
 */
class WP_Role {
	/**
	 * Role name.
	 *
	 * @since 2.0.0
	 * @access public
	 * @var string
	 */
	var $name;

	/**
	 * List of capabilities the role contains.
	 *
	 * @since 2.0.0
	 * @access public
	 * @var array
	 */
	var $capabilities;

	/**
	 * Constructor - Set up object properties.
	 *
	 * The list of capabilities, must have the key as the name of the capability
	 * and the value a boolean of whether it is granted to the role.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param string $role Role name.
	 * @param array $capabilities List of capabilities.
	 */
	function __construct( $role, $capabilities ) {
		$this->name = $role;
		$this->capabilities = $capabilities;
	}

	/**
	 * Assign role a capability.
	 *
	 * @see WP_Roles::add_cap() Method uses implementation for role.
	 * @since 2.0.0
	 * @access public
	 *
	 * @param string $cap Capability name.
	 * @param bool $grant Whether role has capability privilege.
	 */
	function add_cap( $cap, $grant = true ) {
		global $wp_roles;

		if ( ! isset( $wp_roles ) )
			$wp_roles = new WP_Roles();

		$this->capabilities[$cap] = $grant;
		$wp_roles->add_cap( $this->name, $cap, $grant );
	}

	/**
	 * Remove capability from role.
	 *
	 * This is a container for {@link WP_Roles::remove_cap()} to remove the
	 * capability from the role. That is to say, that {@link
	 * WP_Roles::remove_cap()} implements the functionality, but it also makes
	 * sense to use this class, because you don't need to enter the role name.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param string $cap Capability name.
	 */
	function remove_cap( $cap ) {
		global $wp_roles;

		if ( ! isset( $wp_roles ) )
			$wp_roles = new WP_Roles();

		unset( $this->capabilities[$cap] );
		$wp_roles->remove_cap( $this->name, $cap );
	}

	/**
	 * Whether role has capability.
	 *
	 * The capabilities is passed through the 'role_has_cap' filter. The first
	 * parameter for the hook is the list of capabilities the class has
	 * assigned. The second parameter is the capability name to look for. The
	 * third and final parameter for the hook is the role name.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param string $cap Capability name.
	 * @return bool True, if user has capability. False, if doesn't have capability.
	 */
	function has_cap( $cap ) {
		$capabilities = apply_filters( 'role_has_cap', $this->capabilities, $cap, $this->name );
		if ( !empty( $capabilities[$cap] ) )
			return $capabilities[$cap];
		else
			return false;
	}

}

/**
 * WordPress User class.
 *
 * @since 2.0.0
 * @package WordPress
 * @subpackage User
 */
class WP_User {
	/**
	 * User data container.
	 *
	 * @since 2.0.0
	 * @access private
	 * @var array
	 */
	var $data;

	/**
	 * The user's ID.
	 *
	 * @since 2.1.0
	 * @access public
	 * @var int
	 */
	var $ID = 0;

	/**
	 * The individual capabilities the user has been given.
	 *
	 * @since 2.0.0
	 * @access public
	 * @var array
	 */
	var $caps = array();

	/**
	 * User metadata option name.
	 *
	 * @since 2.0.0
	 * @access public
	 * @var string
	 */
	var $cap_key;

	/**
	 * The roles the user is part of.
	 *
	 * @since 2.0.0
	 * @access public
	 * @var array
	 */
	var $roles = array();

	/**
	 * All capabilities the user has, including individual and role based.
	 *
	 * @since 2.0.0
	 * @access public
	 * @var array
	 */
	var $allcaps = array();

	/**
	 * The filter context applied to user data fields.
	 *
	 * @since 2.9.0
	 * @access private
	 * @var string
	 */
	var $filter = null;

	private static $back_compat_keys;

	/**
	 * Constructor
	 *
	 * Retrieves the userdata and passes it to {@link WP_User::init()}.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param int|string $id User's ID
	 * @param string $name Optional. User's username
	 * @param int $blog_id Optional Blog ID, defaults to current blog.
	 * @return WP_User
	 */
	function __construct( $id = 0, $name = '', $blog_id = '' ) {
		if ( ! isset( self::$back_compat_keys ) ) {
			$prefix = $GLOBALS['wpdb']->prefix;
			self::$back_compat_keys = array(
				'user_firstname' => 'first_name',
				'user_lastname' => 'last_name',
				'user_description' => 'description',
				'user_level' => $prefix . 'user_level',
				$prefix . 'usersettings' => $prefix . 'user-settings',
				$prefix . 'usersettingstime' => $prefix . 'user-settings-time',
			);
		}

		if ( ! empty( $id ) && ! is_numeric( $id ) ) {
			$name = $id;
			$id = 0;
		}

		if ( $id )
			$data = self::get_data_by( 'id', $id );
		else
			$data = self::get_data_by( 'login', $name );

		if ( $data )
			$this->init( $data, $blog_id );
	}

	/**
	 * Sets up object properties, including capabilities.
	 *
	 * @param object $data User DB row object
	 * @param int $blog_id Optional. The blog id to initialize for
	 */
	function init( $data, $blog_id = '' ) {
		$this->data = $data;
		$this->ID = (int) $data->ID;

		$this->for_blog( $blog_id );
	}

	/**
	 * Return only the main user fields
	 *
	 * @since 3.3.0
	 *
	 * @param string $field The field to query against: 'id', 'slug', 'email' or 'login'
	 * @param string|int $value The field value
	 * @return object Raw user object
	 */
	static function get_data_by( $field, $value ) {
		global $wpdb;

		if ( 'id' == $field ) {
			// Make sure the value is numeric to avoid casting objects, for example,
			// to int 1.
			if ( ! is_numeric( $value ) )
				return false;
			$value = absint( $value );
		} else {
			$value = trim( $value );
		}

		if ( !$value )
			return false;

		switch ( $field ) {
			case 'id':
				$user_id = $value;
				$db_field = 'ID';
				break;
			case 'slug':
				$user_id = wp_cache_get($value, 'userslugs');
				$db_field = 'user_nicename';
				break;
			case 'email':
				$user_id = wp_cache_get($value, 'useremail');
				$db_field = 'user_email';
				break;
			case 'login':
				$value = sanitize_user( $value );
				$user_id = wp_cache_get($value, 'userlogins');
				$db_field = 'user_login';
				break;
			default:
				return false;
		}

		if ( false !== $user_id ) {
			if ( $user = wp_cache_get( $user_id, 'users' ) )
				return $user;
		}

		if ( !$user = $wpdb->get_row( $wpdb->prepare(
			"SELECT * FROM $wpdb->users WHERE $db_field = %s", $value
		) ) )
			return false;

		update_user_caches( $user );

		return $user;
	}

	/**
	 * Magic method for checking the existence of a certain custom field
	 *
	 * @since 3.3.0
	 */
	function __isset( $key ) {
		if ( 'id' == $key ) {
			_deprecated_argument( 'WP_User->id', '2.1', __( 'Use <code>WP_User->ID</code> instead.' ) );
			$key = 'ID';
		}

		if ( isset( $this->data->$key ) )
			return true;

		if ( isset( self::$back_compat_keys[ $key ] ) )
			$key = self::$back_compat_keys[ $key ];

		return metadata_exists( 'user', $this->ID, $key );
	}

	/**
	 * Magic method for accessing custom fields
	 *
	 * @since 3.3.0
	 */
	function __get( $key ) {
		if ( 'id' == $key ) {
			_deprecated_argument( 'WP_User->id', '2.1', __( 'Use <code>WP_User->ID</code> instead.' ) );
			return $this->ID;
		}

		if ( isset( $this->data->$key ) ) {
			$value = $this->data->$key;
		} else {
			if ( isset( self::$back_compat_keys[ $key ] ) )
				$key = self::$back_compat_keys[ $key ];
			$value = get_user_meta( $this->ID, $key, true );
		}

		if ( $this->filter ) {
			$value = sanitize_user_field( $key, $value, $this->ID, $this->filter );
		}

		return $value;
	}

	/**
	 * Magic method for setting custom fields
	 *
	 * @since 3.3.0
	 */
	function __set( $key, $value ) {
		if ( 'id' == $key ) {
			_deprecated_argument( 'WP_User->id', '2.1', __( 'Use <code>WP_User->ID</code> instead.' ) );
			$this->ID = $value;
			return;
		}

		$this->data->$key = $value;
	}

	/**
	 * Retrieve the value of a property or meta key.
	 *
	 * Retrieves from the users and usermeta table.
	 *
	 * @since 3.3.0
	 *
	 * @param string $key Property
	 */
	function get( $key ) {
		return $this->__get( $key );
	}

	/**
	 * Determine whether a property or meta key is set
	 *
	 * Consults the users and usermeta tables.
	 *
	 * @since 3.3.0
	 *
	 * @param string $key Property
	 */
	function has_prop( $key ) {
		return $this->__isset( $key );
	}

	/**
	 * Set up capability object properties.
	 *
	 * Will set the value for the 'cap_key' property to current database table
	 * prefix, followed by 'capabilities'. Will then check to see if the
	 * property matching the 'cap_key' exists and is an array. If so, it will be
	 * used.
	 *
	 * @access protected
	 * @since 2.1.0
	 *
	 * @param string $cap_key Optional capability key
	 */
	function _init_caps( $cap_key = '' ) {
		global $wpdb;

		if ( empty($cap_key) )
			$this->cap_key = $wpdb->prefix . 'capabilities';
		else
			$this->cap_key = $cap_key;

		$this->caps = get_user_meta( $this->ID, $this->cap_key, true );

		if ( ! is_array( $this->caps ) )
			$this->caps = array();

		$this->get_role_caps();
	}

	/**
	 * Retrieve all of the role capabilities and merge with individual capabilities.
	 *
	 * All of the capabilities of the roles the user belongs to are merged with
	 * the users individual roles. This also means that the user can be denied
	 * specific roles that their role might have, but the specific user isn't
	 * granted permission to.
	 *
	 * @since 2.0.0
	 * @uses $wp_roles
	 * @access public
	 */
	function get_role_caps() {
		global $wp_roles;

		if ( ! isset( $wp_roles ) )
			$wp_roles = new WP_Roles();

		//Filter out caps that are not role names and assign to $this->roles
		if ( is_array( $this->caps ) )
			$this->roles = array_filter( array_keys( $this->caps ), array( &$wp_roles, 'is_role' ) );

		//Build $allcaps from role caps, overlay user's $caps
		$this->allcaps = array();
		foreach ( (array) $this->roles as $role ) {
			$the_role = $wp_roles->get_role( $role );
			$this->allcaps = array_merge( (array) $this->allcaps, (array) $the_role->capabilities );
		}
		$this->allcaps = array_merge( (array) $this->allcaps, (array) $this->caps );
	}

	/**
	 * Add role to user.
	 *
	 * Updates the user's meta data option with capabilities and roles.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param string $role Role name.
	 */
	function add_role( $role ) {
		$this->caps[$role] = true;
		update_user_meta( $this->ID, $this->cap_key, $this->caps );
		$this->get_role_caps();
		$this->update_user_level_from_caps();
	}

	/**
	 * Remove role from user.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param string $role Role name.
	 */
	function remove_role( $role ) {
		if ( !in_array($role, $this->roles) )
			return;
		unset( $this->caps[$role] );
		update_user_meta( $this->ID, $this->cap_key, $this->caps );
		$this->get_role_caps();
		$this->update_user_level_from_caps();
	}

	/**
	 * Set the role of the user.
	 *
	 * This will remove the previous roles of the user and assign the user the
	 * new one. You can set the role to an empty string and it will remove all
	 * of the roles from the user.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param string $role Role name.
	 */
	function set_role( $role ) {
		foreach ( (array) $this->roles as $oldrole )
			unset( $this->caps[$oldrole] );

		if ( 1 == count( $this->roles ) && $role == $this->roles[0] )
			return;

		if ( !empty( $role ) ) {
			$this->caps[$role] = true;
			$this->roles = array( $role => true );
		} else {
			$this->roles = false;
		}
		update_user_meta( $this->ID, $this->cap_key, $this->caps );
		$this->get_role_caps();
		$this->update_user_level_from_caps();
		do_action( 'set_user_role', $this->ID, $role );
	}

	/**
	 * Choose the maximum level the user has.
	 *
	 * Will compare the level from the $item parameter against the $max
	 * parameter. If the item is incorrect, then just the $max parameter value
	 * will be returned.
	 *
	 * Used to get the max level based on the capabilities the user has. This
	 * is also based on roles, so if the user is assigned the Administrator role
	 * then the capability 'level_10' will exist and the user will get that
	 * value.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param int $max Max level of user.
	 * @param string $item Level capability name.
	 * @return int Max Level.
	 */
	function level_reduction( $max, $item ) {
		if ( preg_match( '/^level_(10|[0-9])$/i', $item, $matches ) ) {
			$level = intval( $matches[1] );
			return max( $max, $level );
		} else {
			return $max;
		}
	}

	/**
	 * Update the maximum user level for the user.
	 *
	 * Updates the 'user_level' user metadata (includes prefix that is the
	 * database table prefix) with the maximum user level. Gets the value from
	 * the all of the capabilities that the user has.
	 *
	 * @since 2.0.0
	 * @access public
	 */
	function update_user_level_from_caps() {
		global $wpdb;
		$this->user_level = array_reduce( array_keys( $this->allcaps ), array( $this, 'level_reduction' ), 0 );
		update_user_meta( $this->ID, $wpdb->prefix . 'user_level', $this->user_level );
	}

	/**
	 * Add capability and grant or deny access to capability.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param string $cap Capability name.
	 * @param bool $grant Whether to grant capability to user.
	 */
	function add_cap( $cap, $grant = true ) {
		$this->caps[$cap] = $grant;
		update_user_meta( $this->ID, $this->cap_key, $this->caps );
	}

	/**
	 * Remove capability from user.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param string $cap Capability name.
	 */
	function remove_cap( $cap ) {
		if ( empty( $this->caps[$cap] ) )
			return;
		unset( $this->caps[$cap] );
		update_user_meta( $this->ID, $this->cap_key, $this->caps );
	}

	/**
	 * Remove all of the capabilities of the user.
	 *
	 * @since 2.1.0
	 * @access public
	 */
	function remove_all_caps() {
		global $wpdb;
		$this->caps = array();
		delete_user_meta( $this->ID, $this->cap_key );
		delete_user_meta( $this->ID, $wpdb->prefix . 'user_level' );
		$this->get_role_caps();
	}

	/**
	 * Whether user has capability or role name.
	 *
	 * This is useful for looking up whether the user has a specific role
	 * assigned to the user. The second optional parameter can also be used to
	 * check for capabilities against a specific post.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param string|int $cap Capability or role name to search.
	 * @param int $post_id Optional. Post ID to check capability against specific post.
	 * @return bool True, if user has capability; false, if user does not have capability.
	 */
	function has_cap( $cap ) {
		if ( is_numeric( $cap ) ) {
			_deprecated_argument( __FUNCTION__, '2.0', __('Usage of user levels by plugins and themes is deprecated. Use roles and capabilities instead.') );
			$cap = $this->translate_level_to_cap( $cap );
		}

		$args = array_slice( func_get_args(), 1 );
		$args = array_merge( array( $cap, $this->ID ), $args );
		$caps = call_user_func_array( 'map_meta_cap', $args );

		// Multisite super admin has all caps by definition, Unless specifically denied.
		if ( is_multisite() && is_super_admin( $this->ID ) ) {
			if ( in_array('do_not_allow', $caps) )
				return false;
			return true;
		}

		// Must have ALL requested caps
		$capabilities = apply_filters( 'user_has_cap', $this->allcaps, $caps, $args );
		$capabilities['exist'] = true; // Everyone is allowed to exist
		foreach ( (array) $caps as $cap ) {
			if ( empty( $capabilities[ $cap ] ) )
				return false;
		}

		return true;
	}

	/**
	 * Convert numeric level to level capability name.
	 *
	 * Prepends 'level_' to level number.
	 *
	 * @since 2.0.0
	 * @access public
	 *
	 * @param int $level Level number, 1 to 10.
	 * @return string
	 */
	function translate_level_to_cap( $level ) {
		return 'level_' . $level;
	}

	/**
	 * Set the blog to operate on. Defaults to the current blog.
	 *
	 * @since 3.0.0
	 *
	 * @param int $blog_id Optional Blog ID, defaults to current blog.
	 */
	function for_blog( $blog_id = '' ) {
		global $wpdb;
		if ( ! empty( $blog_id ) )
			$cap_key = $wpdb->get_blog_prefix( $blog_id ) . 'capabilities';
		else
			$cap_key = '';
		$this->_init_caps( $cap_key );
	}
}

/**
 * Map meta capabilities to primitive capabilities.
 *
 * This does not actually compare whether the user ID has the actual capability,
 * just what the capability or capabilities are. Meta capability list value can
 * be 'delete_user', 'edit_user', 'remove_user', 'promote_user', 'delete_post',
 * 'delete_page', 'edit_post', 'edit_page', 'read_post', or 'read_page'.
 *
 * @since 2.0.0
 *
 * @param string $cap Capability name.
 * @param int $user_id User ID.
 * @return array Actual capabilities for meta capability.
 */
function map_meta_cap( $cap, $user_id ) {
	$args = array_slice( func_get_args(), 2 );
	$caps = array();

	switch ( $cap ) {
	case 'remove_user':
		$caps[] = 'remove_users';
		break;
	case 'promote_user':
		$caps[] = 'promote_users';
		break;
	case 'edit_user':
		// Allow user to edit itself
		if ( isset( $args[0] ) && $user_id == $args[0] )
			break;
		// Fall through
	case 'edit_users':
		// If multisite these caps are allowed only for super admins.
		if ( is_multisite() && !is_super_admin( $user_id ) )
			$caps[] = 'do_not_allow';
		else
			$caps[] = 'edit_users'; // Explicit due to primitive fall through
		break;
	case 'delete_post':
	case 'delete_page':
		$author_data = get_userdata( $user_id );
		$post = get_post( $args[0] );

		if ( 'revision' == $post->post_type ) {
			$post = get_post( $post->post_parent );
		}

		$post_type = get_post_type_object( $post->post_type );

		if ( ! $post_type->map_meta_cap ) {
			$caps[] = $post_type->cap->$cap;
			// Prior to 3.1 we would re-call map_meta_cap here.
			if ( 'delete_post' == $cap )
				$cap = $post_type->cap->$cap;
			break;
		}

		if ( '' != $post->post_author ) {
			$post_author_data = get_userdata( $post->post_author );
		} else {
			// No author set yet, so default to current user for cap checks.
			$post_author_data = $author_data;
		}

		// If the user is the author...
		if ( is_object( $post_author_data ) && $user_id == $post_author_data->ID ) {
			// If the post is published...
			if ( 'publish' == $post->post_status ) {
				$caps[] = $post_type->cap->delete_published_posts;
			} elseif ( 'trash' == $post->post_status ) {
				if ('publish' == get_post_meta($post->ID, '_wp_trash_meta_status', true) )
					$caps[] = $post_type->cap->delete_published_posts;
			} else {
				// If the post is draft...
				$caps[] = $post_type->cap->delete_posts;
			}
		} else {
			// The user is trying to edit someone else's post.
			$caps[] = $post_type->cap->delete_others_posts;
			// The post is published, extra cap required.
			if ( 'publish' == $post->post_status )
				$caps[] = $post_type->cap->delete_published_posts;
			elseif ( 'private' == $post->post_status )
				$caps[] = $post_type->cap->delete_private_posts;
		}
		break;
		// edit_post breaks down to edit_posts, edit_published_posts, or
		// edit_others_posts
	case 'edit_post':
	case 'edit_page':
		$author_data = get_userdata( $user_id );
		$post = get_post( $args[0] );

		if ( 'revision' == $post->post_type ) {
			$post = get_post( $post->post_parent );
		}

		$post_type = get_post_type_object( $post->post_type );

		if ( ! $post_type->map_meta_cap ) {
			$caps[] = $post_type->cap->$cap;
			// Prior to 3.1 we would re-call map_meta_cap here.
			if ( 'edit_post' == $cap )
				$cap = $post_type->cap->$cap;
			break;
		}

		if ( '' != $post->post_author ) {
			$post_author_data = get_userdata( $post->post_author );
		} else {
			// No author set yet, so default to current user for cap checks.
			$post_author_data = $author_data;
		}

		//echo "current user id : $user_id, post author id: " . $post_author_data->ID . "<br />";
		// If the user is the author...
		if ( is_object( $post_author_data ) && $user_id == $post_author_data->ID ) {
			// If the post is published...
			if ( 'publish' == $post->post_status ) {
				$caps[] = $post_type->cap->edit_published_posts;
			} elseif ( 'trash' == $post->post_status ) {
				if ('publish' == get_post_meta($post->ID, '_wp_trash_meta_status', true) )
					$caps[] = $post_type->cap->edit_published_posts;
			} else {
				// If the post is draft...
				$caps[] = $post_type->cap->edit_posts;
			}
		} else {
			// The user is trying to edit someone else's post.
			$caps[] = $post_type->cap->edit_others_posts;
			// The post is published, extra cap required.
			if ( 'publish' == $post->post_status )
				$caps[] = $post_type->cap->edit_published_posts;
			elseif ( 'private' == $post->post_status )
				$caps[] = $post_type->cap->edit_private_posts;
		}
		break;
	case 'read_post':
	case 'read_page':
		$author_data = get_userdata( $user_id );
		$post = get_post( $args[0] );

		if ( 'revision' == $post->post_type ) {
			$post = get_post( $post->post_parent );
		}

		$post_type = get_post_type_object( $post->post_type );

		if ( ! $post_type->map_meta_cap ) {
			$caps[] = $post_type->cap->$cap;
			// Prior to 3.1 we would re-call map_meta_cap here.
			if ( 'read_post' == $cap )
				$cap = $post_type->cap->$cap;
			break;
		}

		if ( 'private' != $post->post_status ) {
			$caps[] = $post_type->cap->read;
			break;
		}

		if ( '' != $post->post_author ) {
			$post_author_data = get_userdata( $post->post_author );
		} else {
			// No author set yet, so default to current user for cap checks.
			$post_author_data = $author_data;
		}

		if ( is_object( $post_author_data ) && $user_id == $post_author_data->ID )
			$caps[] = $post_type->cap->read;
		else
			$caps[] = $post_type->cap->read_private_posts;
		break;
	case 'edit_post_meta':
	case 'delete_post_meta':
	case 'add_post_meta':
		$post = get_post( $args[0] );
		$post_type_object = get_post_type_object( $post->post_type );
		$caps = map_meta_cap( $post_type_object->cap->edit_post, $user_id, $post->ID );

		$meta_key = isset( $args[ 1 ] ) ? $args[ 1 ] : false;

		if ( $meta_key && has_filter( "auth_post_meta_{$meta_key}" ) ) {
			$allowed = apply_filters( "auth_post_meta_{$meta_key}", false, $meta_key, $post->ID, $user_id, $cap, $caps );
			if ( ! $allowed )
				$caps[] = $cap;
		} elseif ( $meta_key && is_protected_meta( $meta_key, 'post' ) ) {
			$caps[] = $cap;
		}
		break;
	case 'edit_comment':
		$comment = get_comment( $args[0] );
		$post = get_post( $comment->comment_post_ID );
		$post_type_object = get_post_type_object( $post->post_type );

		$caps = map_meta_cap( $post_type_object->cap->edit_post, $user_id, $post->ID );
		break;
	case 'unfiltered_upload':
		if ( defined('ALLOW_UNFILTERED_UPLOADS') && ALLOW_UNFILTERED_UPLOADS && ( !is_multisite() || is_super_admin( $user_id ) )  )
			$caps[] = $cap;
		else
			$caps[] = 'do_not_allow';
		break;
	case 'edit_files':
	case 'edit_plugins':
	case 'edit_themes':
		if ( defined('DISALLOW_FILE_EDIT') && DISALLOW_FILE_EDIT ) {
			$caps[] = 'do_not_allow';
			break;
		}
		// Fall through if not DISALLOW_FILE_EDIT.
	case 'update_plugins':
	case 'delete_plugins':
	case 'install_plugins':
	case 'update_themes':
	case 'delete_themes':
	case 'install_themes':
	case 'update_core':
		// Disallow anything that creates, deletes, or edits core, plugin, or theme files.
		// Files in uploads are excepted.
		if ( defined('DISALLOW_FILE_MODS') && DISALLOW_FILE_MODS ) {
			$caps[] = 'do_not_allow';
			break;
		}
		// Fall through if not DISALLOW_FILE_MODS.
	case 'unfiltered_html':
		// Disallow unfiltered_html for all users, even admins and super admins.
		if ( defined('DISALLOW_UNFILTERED_HTML') && DISALLOW_UNFILTERED_HTML ) {
			$caps[] = 'do_not_allow';
			break;
		}
		// Fall through if not DISALLOW_UNFILTERED_HTML
	case 'delete_user':
	case 'delete_users':
		// If multisite these caps are allowed only for super admins.
		if ( is_multisite() && !is_super_admin( $user_id ) ) {
			$caps[] = 'do_not_allow';
		} else {
			if ( 'delete_user' == $cap )
				$cap = 'delete_users';
			$caps[] = $cap;
		}
		break;
	case 'create_users':
		if ( !is_multisite() )
			$caps[] = $cap;
		elseif ( is_super_admin() || get_site_option( 'add_new_users' ) )
			$caps[] = $cap;
		else
			$caps[] = 'do_not_allow';
		break;
	default:
		// Handle meta capabilities for custom post types.
		$post_type_meta_caps = _post_type_meta_capabilities();
		if ( isset( $post_type_meta_caps[ $cap ] ) ) {
			$args = array_merge( array( $post_type_meta_caps[ $cap ], $user_id ), $args );
			return call_user_func_array( 'map_meta_cap', $args );
		}

		// If no meta caps match, return the original cap.
		$caps[] = $cap;
	}

	return apply_filters('map_meta_cap', $caps, $cap, $user_id, $args);
}

/**
 * Whether current user has capability or role.
 *
 * @since 2.0.0
 *
 * @param string $capability Capability or role name.
 * @return bool
 */
function current_user_can( $capability ) {
	$current_user = wp_get_current_user();

	if ( empty( $current_user ) )
		return false;

	$args = array_slice( func_get_args(), 1 );
	$args = array_merge( array( $capability ), $args );

	return call_user_func_array( array( $current_user, 'has_cap' ), $args );
}

/**
 * Whether current user has a capability or role for a given blog.
 *
 * @since 3.0.0
 *
 * @param int $blog_id Blog ID
 * @param string $capability Capability or role name.
 * @return bool
 */
function current_user_can_for_blog( $blog_id, $capability ) {
	$current_user = wp_get_current_user();

	if ( empty( $current_user ) )
		return false;

	// Create new object to avoid stomping the global current_user.
	$user = new WP_User( $current_user->ID) ;

	// Set the blog id.  @todo add blog id arg to WP_User constructor?
	$user->for_blog( $blog_id );

	$args = array_slice( func_get_args(), 2 );
	$args = array_merge( array( $capability ), $args );

	return call_user_func_array( array( &$user, 'has_cap' ), $args );
}

/**
 * Whether author of supplied post has capability or role.
 *
 * @since 2.9.0
 *
 * @param int|object $post Post ID or post object.
 * @param string $capability Capability or role name.
 * @return bool
 */
function author_can( $post, $capability ) {
	if ( !$post = get_post($post) )
		return false;

	$author = new WP_User( $post->post_author );

	if ( empty( $author->ID ) )
		return false;

	$args = array_slice( func_get_args(), 2 );
	$args = array_merge( array( $capability ), $args );

	return call_user_func_array( array( &$author, 'has_cap' ), $args );
}

/**
 * Whether a particular user has capability or role.
 *
 * @since 3.1.0
 *
 * @param int|object $user User ID or object.
 * @param string $capability Capability or role name.
 * @return bool
 */
function user_can( $user, $capability ) {
	if ( ! is_object( $user ) )
		$user = new WP_User( $user );

	if ( ! $user || ! $user->ID )
		return false;

	$args = array_slice( func_get_args(), 2 );
	$args = array_merge( array( $capability ), $args );

	return call_user_func_array( array( &$user, 'has_cap' ), $args );
}

/**
 * Retrieve role object.
 *
 * @see WP_Roles::get_role() Uses method to retrieve role object.
 * @since 2.0.0
 *
 * @param string $role Role name.
 * @return object
 */
function get_role( $role ) {
	global $wp_roles;

	if ( ! isset( $wp_roles ) )
		$wp_roles = new WP_Roles();

	return $wp_roles->get_role( $role );
}

/**
 * Add role, if it does not exist.
 *
 * @see WP_Roles::add_role() Uses method to add role.
 * @since 2.0.0
 *
 * @param string $role Role name.
 * @param string $display_name Display name for role.
 * @param array $capabilities List of capabilities, e.g. array( 'edit_posts' => true, 'delete_posts' => false );
 * @return null|WP_Role WP_Role object if role is added, null if already exists.
 */
function add_role( $role, $display_name, $capabilities = array() ) {
	global $wp_roles;

	if ( ! isset( $wp_roles ) )
		$wp_roles = new WP_Roles();

	return $wp_roles->add_role( $role, $display_name, $capabilities );
}

/**
 * Remove role, if it exists.
 *
 * @see WP_Roles::remove_role() Uses method to remove role.
 * @since 2.0.0
 *
 * @param string $role Role name.
 * @return null
 */
function remove_role( $role ) {
	global $wp_roles;

	if ( ! isset( $wp_roles ) )
		$wp_roles = new WP_Roles();

	return $wp_roles->remove_role( $role );
}

/**
 * Retrieve a list of super admins.
 *
 * @since 3.0.0
 *
 * @uses $super_admins Super admins global variable, if set.
 *
 * @return array List of super admin logins
 */
function get_super_admins() {
	global $super_admins;

	if ( isset($super_admins) )
		return $super_admins;
	else
		return get_site_option( 'site_admins', array('admin') );
}

/**
 * Determine if user is a site admin.
 *
 * @since 3.0.0
 *
 * @param int $user_id (Optional) The ID of a user. Defaults to the current user.
 * @return bool True if the user is a site admin.
 */
function is_super_admin( $user_id = false ) {
	if ( $user_id )
		$user = new WP_User( $user_id );
	else
		$user = wp_get_current_user();

	if ( empty( $user->ID ) )
		return false;

	if ( is_multisite() ) {
		$super_admins = get_super_admins();
		if ( is_array( $super_admins ) && in_array( $user->user_login, $super_admins ) )
			return true;
	} else {
		if ( $user->has_cap('delete_users') )
			return true;
	}

	return false;
}

?>
Back to Top