/client-libraries/php/redis.php
PHP | 330 lines | 272 code | 45 blank | 13 comment | 44 complexity | 4c350ea7e571357d1b1c270fb2427805 MD5 | raw file
Possible License(s): BSD-3-Clause
- <?php
- /*******************************************************************************
- * Redis PHP Bindings - http://code.google.com/p/redis/
- *
- * Copyright 2009 Ludovico Magnocavallo
- * Released under the same license as Redis.
- *
- * Version: 0.1
- *
- * $Revision: 139 $
- * $Date: 2009-03-15 22:59:40 +0100 (Sun, 15 Mar 2009) $
- *
- ******************************************************************************/
- class Redis {
-
- var $server;
- var $port;
- var $_sock;
-
- function Redis($host, $port=6379) {
- $this->host = $host;
- $this->port = $port;
- }
-
- function connect() {
- if ($this->_sock)
- return;
- if ($sock = fsockopen($this->host, $this->port, $errno, $errstr)) {
- $this->_sock = $sock;
- return;
- }
- $msg = "Cannot open socket to {$this->host}:{$this->port}";
- if ($errno || $errmsg)
- $msg .= "," . ($errno ? " error $errno" : "") . ($errmsg ? " $errmsg" : "");
- trigger_error("$msg.", E_USER_ERROR);
- }
-
- function disconnect() {
- if ($this->_sock)
- @fclose($this->_sock);
- $this->_sock = null;
- }
-
- function &ping() {
- $this->connect();
- $this->_write("PING\r\n");
- return $this->_simple_response();
- }
-
- function &do_echo($s) {
- $this->connect();
- $this->_write("ECHO " . strlen($s) . "\r\n$s\r\n");
- return $this->_get_value();
- }
-
- function &set($name, $value, $preserve=false) {
- $this->connect();
- $this->_write(
- ($preserve ? 'SETNX' : 'SET') .
- " $name " . strlen($value) . "\r\n$value\r\n"
- );
- return $preserve ? $this->_numeric_response() : $this->_simple_response();
- }
-
- function &get($name) {
- $this->connect();
- $this->_write("GET $name\r\n");
- return $this->_get_value();
- }
-
- function &incr($name, $amount=1) {
- $this->connect();
- if ($amount == 1)
- $this->_write("INCR $name\r\n");
- else
- $this->_write("INCRBY $name $amount\r\n");
- return $this->_numeric_response();
- }
-
- function &decr($name, $amount=1) {
- $this->connect();
- if ($amount == 1)
- $this->_write("DECR $name\r\n");
- else
- $this->_write("DECRBY $name $amount\r\n");
- return $this->_numeric_response();
- }
-
- function &exists($name) {
- $this->connect();
- $this->_write("EXISTS $name\r\n");
- return $this->_numeric_response();
- }
-
- function &delete($name) {
- $this->connect();
- $this->_write("DEL $name\r\n");
- return $this->_numeric_response();
- }
-
- function &keys($pattern) {
- $this->connect();
- $this->_write("KEYS $pattern\r\n");
- return explode(' ', $this->_get_value());
- }
-
- function &randomkey() {
- $this->connect();
- $this->_write("RANDOMKEY\r\n");
- $s =& trim($this->_read());
- $this->_check_for_error($s);
- return $s;
- }
-
- function &rename($src, $dst, $preserve=False) {
- $this->connect();
- if ($preserve) {
- $this->_write("RENAMENX $src $dst\r\n");
- return $this->_numeric_response();
- }
- $this->_write("RENAME $src $dst\r\n");
- return trim($this->_simple_response());
- }
-
- function &push($name, $value, $tail=true) {
- // default is to append the element to the list
- $this->connect();
- $this->_write(
- ($tail ? 'RPUSH' : 'LPUSH') .
- " $name " . strlen($value) . "\r\n$value\r\n"
- );
- return $this->_simple_response();
- }
-
- function <rim($name, $start, $end) {
- $this->connect();
- $this->_write("LTRIM $name $start $end\r\n");
- return $this->_simple_response();
- }
-
- function &lindex($name, $index) {
- $this->connect();
- $this->_write("LINDEX $name $index\r\n");
- return $this->_get_value();
- }
-
- function &pop($name, $tail=true) {
- $this->connect();
- $this->_write(
- ($tail ? 'RPOP' : 'LPOP') .
- " $name\r\n"
- );
- return $this->_get_value();
- }
-
- function &llen($name) {
- $this->connect();
- $this->_write("LLEN $name\r\n");
- return $this->_numeric_response();
- }
-
- function &lrange($name, $start, $end) {
- $this->connect();
- $this->_write("LRANGE $name $start $end\r\n");
- return $this->_get_multi();
- }
- function &sort($name, $query=false) {
- $this->connect();
- if ($query === false) {
- $this->_write("SORT $name\r\n");
- } else {
- $this->_write("SORT $name $query\r\n");
- }
- return $this->_get_multi();
- }
-
- function &lset($name, $value, $index) {
- $this->connect();
- $this->_write("LSET $name $index " . strlen($value) . "\r\n$value\r\n");
- return $this->_simple_response();
- }
-
- function &sadd($name, $value) {
- $this->connect();
- $this->_write("SADD $name " . strlen($value) . "\r\n$value\r\n");
- return $this->_numeric_response();
- }
-
- function &srem($name, $value) {
- $this->connect();
- $this->_write("SREM $name " . strlen($value) . "\r\n$value\r\n");
- return $this->_numeric_response();
- }
-
- function &sismember($name, $value) {
- $this->connect();
- $this->_write("SISMEMBER $name " . strlen($value) . "\r\n$value\r\n");
- return $this->_numeric_response();
- }
-
- function &sinter($sets) {
- $this->connect();
- $this->_write('SINTER ' . implode(' ', $sets) . "\r\n");
- return $this->_get_multi();
- }
-
- function &smembers($name) {
- $this->connect();
- $this->_write("SMEMBERS $name\r\n");
- return $this->_get_multi();
- }
- function &scard($name) {
- $this->connect();
- $this->_write("SCARD $name\r\n");
- return $this->_numeric_response();
- }
-
- function &select_db($name) {
- $this->connect();
- $this->_write("SELECT $name\r\n");
- return $this->_simple_response();
- }
-
- function &move($name, $db) {
- $this->connect();
- $this->_write("MOVE $name $db\r\n");
- return $this->_numeric_response();
- }
-
- function &save($background=false) {
- $this->connect();
- $this->_write(($background ? "BGSAVE\r\n" : "SAVE\r\n"));
- return $this->_simple_response();
- }
-
- function &lastsave() {
- $this->connect();
- $this->_write("LASTSAVE\r\n");
- return $this->_numeric_response();
- }
-
- function &_write($s) {
- while ($s) {
- $i = fwrite($this->_sock, $s);
- if ($i == 0)
- break;
- $s = substr($s, $i);
- }
- }
-
- function &_read($len=1024) {
- if ($s = fgets($this->_sock))
- return $s;
- $this->disconnect();
- trigger_error("Cannot read from socket.", E_USER_ERROR);
- }
-
- function _check_for_error(&$s) {
- if (!$s || $s[0] != '-')
- return;
- if (substr($s, 0, 4) == '-ERR')
- trigger_error("Redis error: " . trim(substr($s, 4)), E_USER_ERROR);
- trigger_error("Redis error: " . substr(trim($this->_read()), 5), E_USER_ERROR);
- }
-
- function &_simple_response() {
- $s =& trim($this->_read());
- if ($s[0] == '+')
- return substr($s, 1);
- if ($err =& $this->_check_for_error($s))
- return $err;
- trigger_error("Cannot parse first line '$s' for a simple response", E_USER_ERROR);
- }
-
- function &_numeric_response($allow_negative=True) {
- $s =& trim($this->_read());
- $i = (int)$s;
- if ($i . '' == $s) {
- if (!$allow_negative && $i < 0)
- $this->_check_for_error($s);
- return $i;
- }
- if ($s == 'nil')
- return null;
- trigger_error("Cannot parse '$s' as numeric response.");
- }
-
- function &_get_value() {
- $s =& trim($this->_read());
- if ($s == 'nil')
- return '';
- else if ($s[0] == '-')
- $this->_check_for_error($s);
- $i = (int)$s;
- if ($i . '' != $s)
- trigger_error("Cannot parse '$s' as data length.");
- $buffer = '';
- while ($i > 0) {
- $s = $this->_read();
- $l = strlen($s);
- $i -= $l;
- if ($l > $i) // ending crlf
- $s = rtrim($s);
- $buffer .= $s;
- }
- if ($i == 0) // let's restore the trailing crlf
- $buffer .= $this->_read();
- return $buffer;
- }
-
- function &_get_multi() {
- $results = array();
- $num =& $this->_numeric_response(false);
- if ($num === false)
- return $results;
- while ($num) {
- $results[] =& $this->_get_value();
- $num -= 1;
- }
- return $results;
- }
-
- }
- ?>