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/source/Plug-in/smarty/internals/core.load_plugins.php

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PHP | 125 lines | 65 code | 13 blank | 47 comment | 30 complexity | d60028c542ec06749cd2d381bc07d0c2 MD5 | raw file
  1<?php
  2/**
  3 * Smarty plugin
  4 * @package Smarty
  5 * @subpackage plugins
  6 */
  7
  8/**
  9 * Load requested plugins
 10 *
 11 * @param array $plugins
 12 */
 13
 14// $plugins
 15
 16function smarty_core_load_plugins($params, &$smarty)
 17{
 18
 19    foreach ($params['plugins'] as $_plugin_info) {
 20        list($_type, $_name, $_tpl_file, $_tpl_line, $_delayed_loading) = $_plugin_info;
 21        $_plugin = &$smarty->_plugins[$_type][$_name];
 22
 23        /*
 24         * We do not load plugin more than once for each instance of Smarty.
 25         * The following code checks for that. The plugin can also be
 26         * registered dynamically at runtime, in which case template file
 27         * and line number will be unknown, so we fill them in.
 28         *
 29         * The final element of the info array is a flag that indicates
 30         * whether the dynamically registered plugin function has been
 31         * checked for existence yet or not.
 32         */
 33        if (isset($_plugin)) {
 34            if (empty($_plugin[3])) {
 35                if (!is_callable($_plugin[0])) {
 36                    $smarty->_trigger_fatal_error("[plugin] $_type '$_name' is not implemented", $_tpl_file, $_tpl_line, __FILE__, __LINE__);
 37                } else {
 38                    $_plugin[1] = $_tpl_file;
 39                    $_plugin[2] = $_tpl_line;
 40                    $_plugin[3] = true;
 41                    if (!isset($_plugin[4])) $_plugin[4] = true; /* cacheable */
 42                }
 43            }
 44            continue;
 45        } else if ($_type == 'insert') {
 46            /*
 47             * For backwards compatibility, we check for insert functions in
 48             * the symbol table before trying to load them as a plugin.
 49             */
 50            $_plugin_func = 'insert_' . $_name;
 51            if (function_exists($_plugin_func)) {
 52                $_plugin = array($_plugin_func, $_tpl_file, $_tpl_line, true, false);
 53                continue;
 54            }
 55        }
 56
 57        $_plugin_file = $smarty->_get_plugin_filepath($_type, $_name);
 58
 59        if (! $_found = ($_plugin_file != false)) {
 60            $_message = "could not load plugin file '$_type.$_name.php'\n";
 61        }
 62
 63        /*
 64         * If plugin file is found, it -must- provide the properly named
 65         * plugin function. In case it doesn't, simply output the error and
 66         * do not fall back on any other method.
 67         */
 68        if ($_found) {
 69            include_once $_plugin_file;
 70
 71            $_plugin_func = 'smarty_' . $_type . '_' . $_name;
 72            if (!function_exists($_plugin_func)) {
 73                $smarty->_trigger_fatal_error("[plugin] function $_plugin_func() not found in $_plugin_file", $_tpl_file, $_tpl_line, __FILE__, __LINE__);
 74                continue;
 75            }
 76        }
 77        /*
 78         * In case of insert plugins, their code may be loaded later via
 79         * 'script' attribute.
 80         */
 81        else if ($_type == 'insert' && $_delayed_loading) {
 82            $_plugin_func = 'smarty_' . $_type . '_' . $_name;
 83            $_found = true;
 84        }
 85
 86        /*
 87         * Plugin specific processing and error checking.
 88         */
 89        if (!$_found) {
 90            if ($_type == 'modifier') {
 91                /*
 92                 * In case modifier falls back on using PHP functions
 93                 * directly, we only allow those specified in the security
 94                 * context.
 95                 */
 96                if ($smarty->security && !in_array($_name, $smarty->security_settings['MODIFIER_FUNCS'])) {
 97                    $_message = "(secure mode) modifier '$_name' is not allowed";
 98                } else {
 99                    if (!function_exists($_name)) {
100                        $_message = "modifier '$_name' is not implemented";
101                    } else {
102                        $_plugin_func = $_name;
103                        $_found = true;
104                    }
105                }
106            } else if ($_type == 'function') {
107                /*
108                 * This is a catch-all situation.
109                 */
110                $_message = "unknown tag - '$_name'";
111            }
112        }
113
114        if ($_found) {
115            $smarty->_plugins[$_type][$_name] = array($_plugin_func, $_tpl_file, $_tpl_line, true, true);
116        } else {
117            // output error
118            $smarty->_trigger_fatal_error('[plugin] ' . $_message, $_tpl_file, $_tpl_line, __FILE__, __LINE__);
119        }
120    }
121}
122
123/* vim: set expandtab: */
124
125?>