337 lines
9.3 KiB
PHP
337 lines
9.3 KiB
PHP
<?php
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/**********************************************************************
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* Author: Justin Vincent (jv@jvmultimedia.com)
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* Web...: http://twitter.com/justinvincent
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* Name..: ezSQL_mysql
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* Desc..: mySQL component (part of ezSQL databse abstraction library)
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*
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*/
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/**********************************************************************
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* ezSQL error strings - mySQL
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*/
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global $ezsql_mysql_str;
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$ezsql_mysql_str = array
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(
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1 => 'Require $dbuser and $dbpassword to connect to a database server',
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2 => 'Error establishing mySQL database connection. Correct user/password? Correct hostname? Database server running?',
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3 => 'Require $dbname to select a database',
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4 => 'mySQL database connection is not active',
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5 => 'Unexpected error while trying to select database'
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);
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/**********************************************************************
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* ezSQL Database specific class - mySQL
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*/
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if ( ! function_exists ('mysql_connect') ) die('<b>Fatal Error:</b> ezSQL_mysql requires mySQL Lib to be compiled and or linked in to the PHP engine');
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if ( ! class_exists ('ezSQLcore') ) die('<b>Fatal Error:</b> ezSQL_mysql requires ezSQLcore (ez_sql_core.php) to be included/loaded before it can be used');
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class ezSQL_mysql extends ezSQLcore
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{
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var $dbuser = false;
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var $dbpassword = false;
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var $dbname = false;
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var $dbhost = false;
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var $encoding = false;
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var $rows_affected = false;
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/**********************************************************************
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* Constructor - allow the user to perform a quick connect at the
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* same time as initialising the ezSQL_mysql class
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*/
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function ezSQL_mysql($dbuser='', $dbpassword='', $dbname='', $dbhost='localhost', $encoding='')
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{
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$this->dbuser = $dbuser;
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$this->dbpassword = $dbpassword;
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$this->dbname = $dbname;
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$this->dbhost = $dbhost;
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$this->encoding = $encoding;
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}
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/**********************************************************************
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* Short hand way to connect to mySQL database server
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* and select a mySQL database at the same time
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*/
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function quick_connect($dbuser='', $dbpassword='', $dbname='', $dbhost='localhost', $encoding='')
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{
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$return_val = false;
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if ( ! $this->connect($dbuser, $dbpassword, $dbhost,true) ) ;
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else if ( ! $this->select($dbname,$encoding) ) ;
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else $return_val = true;
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return $return_val;
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}
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/**********************************************************************
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* Try to connect to mySQL database server
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*/
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function connect($dbuser='', $dbpassword='', $dbhost='localhost')
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{
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global $ezsql_mysql_str; $return_val = false;
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// Keep track of how long the DB takes to connect
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$this->timer_start('db_connect_time');
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// Must have a user and a password
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if ( ! $dbuser )
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{
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$this->register_error($ezsql_mysql_str[1].' in '.__FILE__.' on line '.__LINE__);
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$this->show_errors ? trigger_error($ezsql_mysql_str[1],E_USER_WARNING) : null;
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}
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// Try to establish the server database handle
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else if ( ! $this->dbh = @mysql_connect($dbhost,$dbuser,$dbpassword,true,131074) )
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{
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$this->register_error($ezsql_mysql_str[2].' in '.__FILE__.' on line '.__LINE__);
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$this->show_errors ? trigger_error($ezsql_mysql_str[2],E_USER_WARNING) : null;
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}
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else
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{
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$this->dbuser = $dbuser;
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$this->dbpassword = $dbpassword;
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$this->dbhost = $dbhost;
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$return_val = true;
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$this->conn_queries = 0;
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}
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return $return_val;
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}
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/**********************************************************************
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* Try to select a mySQL database
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*/
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function select($dbname='', $encoding='')
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{
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global $ezsql_mysql_str; $return_val = false;
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// Must have a database name
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if ( ! $dbname )
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{
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$this->register_error($ezsql_mysql_str[3].' in '.__FILE__.' on line '.__LINE__);
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$this->show_errors ? trigger_error($ezsql_mysql_str[3],E_USER_WARNING) : null;
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}
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// Must have an active database connection
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else if ( ! $this->dbh )
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{
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$this->register_error($ezsql_mysql_str[4].' in '.__FILE__.' on line '.__LINE__);
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$this->show_errors ? trigger_error($ezsql_mysql_str[4],E_USER_WARNING) : null;
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}
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// Try to connect to the database
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else if ( !@mysql_select_db($dbname,$this->dbh) )
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{
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// Try to get error supplied by mysql if not use our own
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if ( !$str = @mysql_error($this->dbh))
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$str = $ezsql_mysql_str[5];
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$this->register_error($str.' in '.__FILE__.' on line '.__LINE__);
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$this->show_errors ? trigger_error($str,E_USER_WARNING) : null;
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}
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else
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{
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$this->dbname = $dbname;
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if ( $encoding == '') $encoding = $this->encoding;
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if($encoding!='')
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{
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$encoding = strtolower(str_replace("-","",$encoding));
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$charsets = array();
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$result = mysql_query("SHOW CHARACTER SET");
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while($row = mysql_fetch_array($result,MYSQL_ASSOC))
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{
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$charsets[] = $row["Charset"];
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}
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if(in_array($encoding,$charsets)){
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mysql_query("SET NAMES '".$encoding."'");
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}
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}
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$return_val = true;
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}
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return $return_val;
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}
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/**********************************************************************
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* Format a mySQL string correctly for safe mySQL insert
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* (no mater if magic quotes are on or not)
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*/
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function escape($str)
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{
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// If there is no existing database connection then try to connect
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if ( ! isset($this->dbh) || ! $this->dbh )
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{
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$this->connect($this->dbuser, $this->dbpassword, $this->dbhost);
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$this->select($this->dbname, $this->encoding);
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}
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return mysql_real_escape_string(stripslashes($str));
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}
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/**********************************************************************
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* Return mySQL specific system date syntax
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* i.e. Oracle: SYSDATE Mysql: NOW()
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*/
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function sysdate()
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{
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return 'NOW()';
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}
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/**********************************************************************
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* Perform mySQL query and try to detirmin result value
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*/
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function query($query)
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{
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// This keeps the connection alive for very long running scripts
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if ( $this->count(false) >= 500 )
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{
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$this->disconnect();
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$this->quick_connect($this->dbuser,$this->dbpassword,$this->dbname,$this->dbhost,$this->encoding);
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}
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// Initialise return
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$return_val = 0;
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// Flush cached values..
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$this->flush();
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// For reg expressions
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$query = trim($query);
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// Log how the function was called
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$this->func_call = "\$db->query(\"$query\")";
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// Keep track of the last query for debug..
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$this->last_query = $query;
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// Count how many queries there have been
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$this->count(true, true);
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// Start timer
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$this->timer_start($this->num_queries);
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// Use core file cache function
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if ( $cache = $this->get_cache($query) )
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{
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// Keep tack of how long all queries have taken
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$this->timer_update_global($this->num_queries);
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// Trace all queries
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if ( $this->use_trace_log )
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{
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$this->trace_log[] = $this->debug(false);
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}
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return $cache;
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}
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// If there is no existing database connection then try to connect
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if ( ! isset($this->dbh) || ! $this->dbh )
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{
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$this->connect($this->dbuser, $this->dbpassword, $this->dbhost);
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$this->select($this->dbname,$this->encoding);
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// No existing connection at this point means the server is unreachable
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if ( ! isset($this->dbh) || ! $this->dbh )
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return false;
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}
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// Perform the query via std mysql_query function..
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$this->result = @mysql_query($query,$this->dbh);
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// If there is an error then take note of it..
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if ( $str = @mysql_error($this->dbh) )
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{
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$this->register_error($str);
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$this->show_errors ? trigger_error($str,E_USER_WARNING) : null;
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return false;
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}
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// Query was an insert, delete, update, replace
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if ( preg_match("/^(insert|delete|update|replace|truncate|drop|create|alter|set|lock|unlock)\s+/i",$query) )
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{
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$is_insert = true;
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$this->rows_affected = @mysql_affected_rows($this->dbh);
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// Take note of the insert_id
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if ( preg_match("/^(insert|replace)\s+/i",$query) )
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{
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$this->insert_id = @mysql_insert_id($this->dbh);
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}
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// Return number fo rows affected
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$return_val = $this->rows_affected;
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}
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// Query was a select
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else
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{
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$is_insert = false;
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// Take note of column info
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$i=0;
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while ($i < @mysql_num_fields($this->result))
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{
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$this->col_info[$i] = @mysql_fetch_field($this->result);
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$i++;
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}
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// Store Query Results
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$num_rows=0;
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while ( $row = @mysql_fetch_object($this->result) )
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{
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// Store relults as an objects within main array
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$this->last_result[$num_rows] = $row;
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$num_rows++;
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}
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@mysql_free_result($this->result);
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// Log number of rows the query returned
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$this->num_rows = $num_rows;
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// Return number of rows selected
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$return_val = $this->num_rows;
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}
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// disk caching of queries
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$this->store_cache($query,$is_insert);
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// If debug ALL queries
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$this->trace || $this->debug_all ? $this->debug() : null ;
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// Keep tack of how long all queries have taken
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$this->timer_update_global($this->num_queries);
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// Trace all queries
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if ( $this->use_trace_log )
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{
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$this->trace_log[] = $this->debug(false);
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}
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return $return_val;
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}
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/**********************************************************************
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* Close the active mySQL connection
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*/
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function disconnect()
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{
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$this->conn_queries = 0; // Reset connection queries count
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@mysql_close($this->dbh);
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}
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}
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