www.gusucode.com > iCMS 基于HTML5的多终端建站系统 v6.0.7源码程序 > icms_v6.0.7.1/iPHP/core/iMysql.class.php
<?php
/**
* iPHP - i PHP Framework
* Copyright (c) 2012 iiiphp.com. All rights reserved.
*
* @author coolmoo <iiiphp@qq.com>
* @site http://www.iiiphp.com
* @licence http://www.iiiphp.com/license
* @version 1.0.1
* @package iDB
* @$Id: iMysql.class.php 2412 2014-05-04 09:52:07Z coolmoo $
*/
define('OBJECT', 'OBJECT');
define('ARRAY_A', 'ARRAY_A');
define('ARRAY_N', 'ARRAY_N');
defined('SAVEQUERIES') OR define('SAVEQUERIES', true);
class iDB{
public static $show_errors = false;
public static $num_queries = 0;
public static $last_query;
public static $col_info;
public static $queries;
public static $func_call;
public static $last_result;
public static $num_rows;
public static $insert_id;
private static $collate;
private static $time_start;
private static $last_error ;
private static $link;
private static $result;
public static function connect($break=null) {
extension_loaded('mysql') OR die('您的 PHP 环境看起来缺少 MySQL 数据库部分，这对 iPHP 来说是必须的。');
defined('iPHP_DB_COLLATE') &&self::$collate = iPHP_DB_COLLATE;
if(isset($GLOBALS['iPHP_DB'])){
self::$link = $GLOBALS['iPHP_DB'];
if(self::$link){
if(mysql_ping(self::$link))
return self::$link;
}
}
self::$link = @mysql_connect(iPHP_DB_HOST, iPHP_DB_USER, iPHP_DB_PASSWORD);
if($break==='link'){
return self::$link;
}
self::$link OR self::bail("<h1>数据库连接失败</h1><p>请检查 <em><strong>config.php</strong></em> 的配置是否正确!</p><ul><li>请确认主机支持MySQL?</li><li>请确认用户名和密码正确?</li><li>请确认主机名正确?(一般为localhost)</li></ul><p>如果你不确定这些情况,请询问你的主机提供商.如果你还需要帮助你可以随时浏览 <a href='http://www.iiiphp.com'>iPHP 支持论坛</a>.</p>");
$GLOBALS['iPHP_DB'] = self::$link;
self::pre_set();
if($break===null){
self::select_db();
}
}
public static function pre_set() {
self::query("SET NAMES '".iPHP_DB_CHARSET."'");
self::query("SET @@sql_mode = ''");
}
public static function select_db($var=false) {
$sel = @mysql_select_db(iPHP_DB_NAME, self::$link);
if($var) return $sel;
$sel OR self::bail("<h1>数据库连接失败</h1><p>我们能连接到数据库服务器（即数据库用户名和密码正确） ，但是不能链接到<em><strong> ".iPHP_DB_NAME." </strong></em>数据库.</p><ul><li>你确定<em><strong> ".iPHP_DB_NAME." </strong></em>存在?</li></ul><p>如果你不确定这些情况,请询问你的主机提供商.如果你还需要帮助你可以随时浏览 <a href='http://www.iiiphp.com'>iPHP 支持论坛</a>.</p>");
}
// ==================================================================
// Basic Query - see docs for more detail
public static function query($query,$QT=NULL) {
if(empty($query)){
if (self::$show_errors) {
self::bail("SQL IS EMPTY");
} else {
return false;
}
}
self::$link OR self::connect();
// filter the query, if filters are available
// NOTE: some queries are made before the plugins have been loaded, and thus cannot be filtered with this method
$query = str_replace(iPHP_DB_PREFIX_TAG,iPHP_DB_PREFIX, trim($query));
// initialise return
$return_val = 0;
self::flush();
// Log how the function was called
self::$func_call = __CLASS__.'::query("'.$query.'")';
// Keep track of the last query for debug..
self::$last_query = $query;
// Perform the query via std mysql_query function..
SAVEQUERIES && self::timer_start();
self::$result = @mysql_query($query, self::$link);
if(!self::$result){
// If there is an error then take note of it..
return self::print_error();
}
self::$num_queries++;
SAVEQUERIES && self::$queries[] = array( $query, self::timer_stop());
if($QT=='get'){
return self::$result;
}
$QH = strtoupper(substr($query,0,strpos($query, ' ')));
if (in_array($QH,array('INSERT','DELETE','UPDATE','REPLACE','SET','CREATE','DROP','ALTER'))) {
$rows_affected = mysql_affected_rows(self::$link);
// Take note of the insert_id
if (in_array($QH,array("INSERT","REPLACE"))) {
self::$insert_id = mysql_insert_id(self::$link);
}
// Return number of rows affected
$return_val = $rows_affected;
} else {
if($QT=="field") {
$i = 0;
while ($i < @mysql_num_fields(self::$result)) {
self::$col_info[$i] = mysql_fetch_field(self::$result);
$i++;
}
}else {
$num_rows = 0;
while ( $row = @mysql_fetch_object(self::$result) ) {
self::$last_result[$num_rows] = $row;
$num_rows++;
}
// Log number of rows the query returned
self::$num_rows = $num_rows;
// Return number of rows selected
$return_val = $num_rows;
}
@mysql_free_result(self::$result);
}
return $return_val;
}
public static function get($output = OBJECT) {
if ( $output == OBJECT ) {
return mysql_fetch_object(self::$result,MYSQL_ASSOC);
}else{
return mysql_fetch_array(self::$result,MYSQL_ASSOC);
}
}
/**
* Insert an array of data into a table
* @param string $table WARNING: not sanitized!
* @param array $data should not already be SQL-escaped
* @return mixed results of self::query()
*/
public static function insert($table, $data) {
// $data = add_magic_quotes($data);
$fields = array_keys($data);
self::query("INSERT INTO ".iPHP_DB_PREFIX_TAG."{$table} (`" . implode('`,`',$fields) . "`) VALUES ('".implode("','",$data)."')");
return self::$insert_id;
}
/**
* Update a row in the table with an array of data
* @param string $table WARNING: not sanitized!
* @param array $data should not already be SQL-escaped
* @param array $where a named array of WHERE column => value relationships. Multiple member pairs will be joined with ANDs. WARNING: the column names are not currently sanitized!
* @return mixed results of self::query()
*/
public static function update($table, $data, $where) {
// $data = add_magic_quotes($data);
$bits = $wheres = array();
foreach ( array_keys($data) as $k ){
$bits[] = "`$k` = '$data[$k]'";
}
if ( is_array( $where ) ){
foreach ( $where as $c => $v )
$wheres[] = "$c = '" . addslashes( $v ) . "'";
}else{
return false;
}
return self::query("UPDATE ".iPHP_DB_PREFIX_TAG."{$table} SET " . implode( ', ', $bits ) . ' WHERE ' . implode( ' AND ', $wheres ) . ' LIMIT 1;' );
}
/**
* Get one variable from the database
* @param string $query (can be null as well, for caching, see codex)
* @param int $x = 0 row num to return
* @param int $y = 0 col num to return
* @return mixed results
*/
public static function value($query=null, $x = 0, $y = 0) {
self::$func_call = __CLASS__."::value(\"$query\",$x,$y)";
$query && self::query($query);
// Extract var out of cached results based x,y vals
if ( !empty( self::$last_result[$y] ) ) {
$values = array_values(get_object_vars(self::$last_result[$y]));
}
// If there is a value return it else return null
return (isset($values[$x]) && $values[$x]!=='') ? $values[$x] : null;
}
/**
* Get one row from the database
* @param string $query
* @param string $output ARRAY_A | ARRAY_N | OBJECT
* @param int $y row num to return
* @return mixed results
*/
public static function row($query = null, $output = OBJECT, $y = 0) {
self::$func_call = __CLASS__."::row(\"$query\",$output,$y)";
$query && self::query($query);
if ( !isset(self::$last_result[$y]) )
return null;
if ( $output == OBJECT ) {
return self::$last_result[$y] ? self::$last_result[$y] : null;
} elseif ( $output == ARRAY_A ) {
return self::$last_result[$y] ? get_object_vars(self::$last_result[$y]) : null;
} elseif ( $output == ARRAY_N ) {
return self::$last_result[$y] ? array_values(get_object_vars(self::$last_result[$y])) : null;
} else {
self::print_error(__CLASS__."::row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N");
}
}
/**
* Return an entire result set from the database
* @param string $query (can also be null to pull from the cache)
* @param string $output ARRAY_A | ARRAY_N | OBJECT
* @return mixed results
*/
public static function all($query = null, $output = ARRAY_A) {
self::$func_call = __CLASS__."::array(\"$query\", $output)";
$query && self::query($query);
// Send back array of objects. Each row is an object
if ( $output == OBJECT ) {
return self::$last_result;
} elseif ( $output == ARRAY_A || $output == ARRAY_N ) {
if ( self::$last_result ) {
$i = 0;
foreach( (array) self::$last_result as $row ) {
if ( $output == ARRAY_N ) {
// ...integer-keyed row arrays
$new_array[$i] = array_values( get_object_vars( $row ) );
} else {
// ...column name-keyed row arrays
$new_array[$i] = get_object_vars( $row );
}
++$i;
}
return $new_array;
} else {
return null;
}
}
}
/**
* Gets one column from the database
* @param string $query (can be null as well, for caching, see codex)
* @param int $x col num to return
* @return array results
*/
public static function col($query = null , $x = 0) {
$query && self::query($query);
$new_array = array();
// Extract the column values
for ( $i=0; $i < count(self::$last_result); $i++ ) {
$new_array[$i] = self::value(null, $x, $i);
}
return $new_array;
}
/**
* Grabs column metadata from the last query
* @param string $info_type one of name, table, def, max_length, not_null, primary_key, multiple_key, unique_key, numeric, blob, type, unsigned, zerofill
* @param int $col_offset 0: col name. 1: which table the col's in. 2: col's max length. 3: if the col is numeric. 4: col's type
* @return mixed results
*/
public static function col_info($query = null ,$info_type = 'name', $col_offset = -1) {
$query && self::query($query,"field");
if ( self::$col_info ) {
if ( $col_offset == -1 ) {
$i = 0;
foreach(self::$col_info as $col ) {
$new_array[$i] = $col->{$info_type};
$i++;
}
return $new_array;
} else {
return self::$col_info[$col_offset]->{$info_type};
}
}
}
public static function version() {
self::$link OR self::connect();
// Make sure the server has MySQL 4.0
$mysql_version = preg_replace('|[^0-9\.]|', '', @mysql_get_server_info(self::$link));
if ( version_compare($mysql_version, '4.0.0', '<') )
self::bail('database_version<strong>ERROR</strong> iPHP %s requires MySQL 4.0.0 or higher');
else
return $mysql_version;
}
public static function debug($show=false){
if(!self::$show_errors) return false;
if(!$show) echo '<!--';
echo self::$last_query."\n";
$explain = self::row('EXPLAIN EXTENDED '.self::$last_query);
var_dump($explain);
if(!$show) echo "-->\n";
}
// ==================================================================
// Kill cached query results
public static function flush() {
self::$last_result = array();
self::$col_info = null;
self::$last_query = null;
}
/**
* Starts the timer, for debugging purposes
*/
public static function timer_start() {
$mtime = microtime();
$mtime = explode(' ', $mtime);
self::$time_start = $mtime[1] + $mtime[0];
return true;
}
/**
* Stops the debugging timer
* @return int total time spent on the query, in milliseconds
*/
public static function timer_stop() {
$mtime = microtime();
$mtime = explode(' ', $mtime);
$time_end = $mtime[1] + $mtime[0];
$time_total = $time_end - self::$time_start;
return $time_total;
}
// ==================================================================
// Print SQL/DB error.
public static function print_error($error = '') {
self::$last_error = mysql_error(self::$link);
$error OR $error = self::$last_error;
$error = htmlspecialchars($error, ENT_QUOTES);
$query = htmlspecialchars(self::$last_query, ENT_QUOTES);
// Is error output turned on or not..
if ( self::$show_errors ) {
self::bail("<strong>iPHP database error:</strong> [$error]<br /><code>$query</code>");
} else {
return false;
}
}
/**
* Wraps fatal errors in a nice header and footer and dies.
* @param string $message
*/
public static function bail($message){ // Just wraps errors in a nice header and footer
if ( !self::$show_errors ) {
return false;
}
trigger_error($message,E_USER_ERROR);
}
}