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krtmn/includes/ezSQL/ez_sql_mysql.php

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2016-04-13 22:02:46 +02:00
<?php
/**********************************************************************
* Author: Justin Vincent (jv@jvmultimedia.com)
* Web...: http://twitter.com/justinvincent
* Name..: ezSQL_mysql
* Desc..: mySQL component (part of ezSQL databse abstraction library)
*
*/
/**********************************************************************
* ezSQL error strings - mySQL
*/
global $ezsql_mysql_str;
$ezsql_mysql_str = array
(
1 => 'Require $dbuser and $dbpassword to connect to a database server',
2 => 'Error establishing mySQL database connection. Correct user/password? Correct hostname? Database server running?',
3 => 'Require $dbname to select a database',
4 => 'mySQL database connection is not active',
5 => 'Unexpected error while trying to select database'
);
/**********************************************************************
* ezSQL Database specific class - mySQL
*/
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');
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');
class ezSQL_mysql extends ezSQLcore
{
var $dbuser = false;
var $dbpassword = false;
var $dbname = false;
var $dbhost = false;
var $encoding = false;
var $rows_affected = false;
/**********************************************************************
* Constructor - allow the user to perform a qucik connect at the
* same time as initialising the ezSQL_mysql class
*/
function __construct($dbuser='', $dbpassword='', $dbname='', $dbhost='localhost', $encoding='')
{
$this->dbuser = $dbuser;
$this->dbpassword = $dbpassword;
$this->dbname = $dbname;
$this->dbhost = $dbhost;
$this->encoding = $encoding;
}
/**********************************************************************
* Short hand way to connect to mySQL database server
* and select a mySQL database at the same time
*/
function quick_connect($dbuser='', $dbpassword='', $dbname='', $dbhost='localhost', $encoding='')
{
$return_val = false;
if ( ! $this->connect($dbuser, $dbpassword, $dbhost,true) ) ;
else if ( ! $this->select($dbname,$encoding) ) ;
else $return_val = true;
return $return_val;
}
/**********************************************************************
* Try to connect to mySQL database server
*/
function connect($dbuser='', $dbpassword='', $dbhost='localhost')
{
global $ezsql_mysql_str; $return_val = false;
// Keep track of how long the DB takes to connect
$this->timer_start('db_connect_time');
// Must have a user and a password
if ( ! $dbuser )
{
$this->register_error($ezsql_mysql_str[1].' in '.__FILE__.' on line '.__LINE__);
$this->show_errors ? trigger_error($ezsql_mysql_str[1],E_USER_WARNING) : null;
}
// Try to establish the server database handle
else if ( ! $this->dbh = @mysql_connect($dbhost,$dbuser,$dbpassword,true,131074) )
{
$this->register_error($ezsql_mysql_str[2].' in '.__FILE__.' on line '.__LINE__);
$this->show_errors ? trigger_error($ezsql_mysql_str[2],E_USER_WARNING) : null;
}
else
{
$this->dbuser = $dbuser;
$this->dbpassword = $dbpassword;
$this->dbhost = $dbhost;
$return_val = true;
}
return $return_val;
}
/**********************************************************************
* Try to select a mySQL database
*/
function select($dbname='', $encoding='')
{
global $ezsql_mysql_str; $return_val = false;
// Must have a database name
if ( ! $dbname )
{
$this->register_error($ezsql_mysql_str[3].' in '.__FILE__.' on line '.__LINE__);
$this->show_errors ? trigger_error($ezsql_mysql_str[3],E_USER_WARNING) : null;
}
// Must have an active database connection
else if ( ! $this->dbh )
{
$this->register_error($ezsql_mysql_str[4].' in '.__FILE__.' on line '.__LINE__);
$this->show_errors ? trigger_error($ezsql_mysql_str[4],E_USER_WARNING) : null;
}
// Try to connect to the database
else if ( !@mysql_select_db($dbname,$this->dbh) )
{
// Try to get error supplied by mysql if not use our own
if ( !$str = @mysql_error($this->dbh))
$str = $ezsql_mysql_str[5];
$this->register_error($str.' in '.__FILE__.' on line '.__LINE__);
$this->show_errors ? trigger_error($str,E_USER_WARNING) : null;
}
else
{
$this->dbname = $dbname;
if ( $encoding == '') $encoding = $this->encoding;
if($encoding!='')
{
$encoding = strtolower(str_replace("-","",$encoding));
$charsets = array();
$result = mysql_query("SHOW CHARACTER SET");
while($row = mysql_fetch_array($result,MYSQL_ASSOC))
{
$charsets[] = $row["Charset"];
}
if(in_array($encoding,$charsets)){
mysql_query("SET NAMES '".$encoding."'");
}
}
$return_val = true;
}
return $return_val;
}
/**********************************************************************
* Format a mySQL string correctly for safe mySQL insert
* (no mater if magic quotes are on or not)
*/
function escape($str)
{
// If there is no existing database connection then try to connect
if ( ! isset($this->dbh) || ! $this->dbh )
{
$this->connect($this->dbuser, $this->dbpassword, $this->dbhost);
$this->select($this->dbname, $this->encoding);
}
return mysql_real_escape_string(stripslashes($str));
}
/**********************************************************************
* Return mySQL specific system date syntax
* i.e. Oracle: SYSDATE Mysql: NOW()
*/
function sysdate()
{
return 'NOW()';
}
/**********************************************************************
* Perform mySQL query and try to detirmin result value
*/
function query($query)
{
// This keeps the connection alive for very long running scripts
if ( $this->num_queries >= 500 )
{
$this->num_queries = 0;
$this->disconnect();
$this->quick_connect($this->dbuser,$this->dbpassword,$this->dbname,$this->dbhost,$this->encoding);
}
// Initialise return
$return_val = 0;
// Flush cached values..
$this->flush();
// For reg expressions
$query = trim($query);
// Log how the function was called
$this->func_call = "\$db->query(\"$query\")";
// Keep track of the last query for debug..
$this->last_query = $query;
// Count how many queries there have been
$this->num_queries++;
// Start timer
$this->timer_start($this->num_queries);
// Use core file cache function
if ( $cache = $this->get_cache($query) )
{
// Keep tack of how long all queries have taken
$this->timer_update_global($this->num_queries);
// Trace all queries
if ( $this->use_trace_log )
{
$this->trace_log[] = $this->debug(false);
}
return $cache;
}
// If there is no existing database connection then try to connect
if ( ! isset($this->dbh) || ! $this->dbh )
{
$this->connect($this->dbuser, $this->dbpassword, $this->dbhost);
$this->select($this->dbname,$this->encoding);
if ( ! isset($this->dbh) || ! $this->dbh )
return false;
}
// Perform the query via std mysql_query function..
$this->result = @mysql_query($query,$this->dbh);
// If there is an error then take note of it..
if ( $str = @mysql_error($this->dbh) )
{
$is_insert = true;
$this->register_error($str);
$this->show_errors ? trigger_error($str,E_USER_WARNING) : null;
return false;
}
// Query was an insert, delete, update, replace
$is_insert = false;
if ( preg_match("/^(insert|delete|update|replace|truncate|drop|create|alter|set)\s+/i",$query) )
{
$this->rows_affected = @mysql_affected_rows($this->dbh);
// Take note of the insert_id
if ( preg_match("/^(insert|replace)\s+/i",$query) )
{
$this->insert_id = @mysql_insert_id($this->dbh);
}
// Return number fo rows affected
$return_val = $this->rows_affected;
}
// Query was a select
else
{
// Take note of column info
$i=0;
while ($i < @mysql_num_fields($this->result))
{
$this->col_info[$i] = @mysql_fetch_field($this->result);
$i++;
}
// Store Query Results
$num_rows=0;
while ( $row = @mysql_fetch_object($this->result) )
{
// Store relults as an objects within main array
$this->last_result[$num_rows] = $row;
$num_rows++;
}
@mysql_free_result($this->result);
// Log number of rows the query returned
$this->num_rows = $num_rows;
// Return number of rows selected
$return_val = $this->num_rows;
}
// disk caching of queries
$this->store_cache($query,$is_insert);
// If debug ALL queries
$this->trace || $this->debug_all ? $this->debug() : null ;
// Keep tack of how long all queries have taken
$this->timer_update_global($this->num_queries);
// Trace all queries
if ( $this->use_trace_log )
{
$this->trace_log[] = $this->debug(false);
}
return $return_val;
}
/**********************************************************************
* Close the active mySQL connection
*/
function disconnect()
{
@mysql_close($this->dbh);
}
}