平时用PHP做一些小工具或者小功能，不可能去拖个大框架来实现MySQL的操作，用原生函数操作又麻烦到不行。
看到ECShop这个开源系统的 cls_mysql.php 这个操作类库还不错，就直接拿来用了。
使用方式非常简单，以下增删改查演示。
require('cls_mysql.php'); //包含类库
/*数据库配置*/
$db_host = "localhost:3306";
$db_name = "test";
$db_user = "test";
$db_pass = "test";
//初始化数据库类
$db = new cls_mysql($db_host, $db_user, $db_pass, $db_name);
$db_host = $db_user = $db_pass = $db_name = NULL;
//下面就可以用 $db 这个全局变量操作
//增
$sql="insert into xxxx(xxx,xxx) values(xxx,xxx)";
$db->query($sql);
//删
$sql="delete from xxxx where xx=xxx";
$db->query($sql);
//改
$sql="update xxxx set xxx=xxx";
$db->query($sql);
//查
//主要是查，可以有几种查询方式
$sql="select * from xxxx";
$r=$db->getAll($sql); //获取所有数据集转数组
$r=$db->getRow($sql); //获取某一行数据集转数组
$r=$db->getCol($sql); //获取某一列数据集转数组
$r=$db->getOne($sql); //获取某一个数据集转数组
完整的类库文件：
/**
* MYSQL 公用类库
*/
define('EC_CHARSET','utf-8'); //定义字符集
class cls_mysql
{
var $link_id = NULL;
var $settings = array();
var $queryCount = 0;
var $queryTime = '';
var $queryLog = array();
var $max_cache_time = 300; // 最大的缓存时间，以秒为单位
var $cache_data_dir = 'temp/query_caches/';
var $root_path = '';
var $error_message = array();
var $platform = '';
var $version = '';
var $dbhash = '';
var $starttime = 0;
var $timeline = 0;
var $timezone = 0;
var $mysql_config_cache_file_time = 0;
var $mysql_disable_cache_tables = array(); // 不允许被缓存的表，遇到将不会进行缓存
function __construct($dbhost, $dbuser, $dbpw, $dbname = '', $charset = 'gbk', $pconnect = 0, $quiet = 0)
{
$this->cls_mysql($dbhost, $dbuser, $dbpw, $dbname, $charset, $pconnect, $quiet);
}
function cls_mysql($dbhost, $dbuser, $dbpw, $dbname = '', $charset = 'gbk', $pconnect = 0, $quiet = 0)
{
if (defined('EC_CHARSET'))
{
$charset = strtolower(str_replace('-', '', EC_CHARSET));
}
if (defined('ROOT_PATH') && !$this->root_path)
{
$this->root_path = ROOT_PATH;
}
if ($quiet)
{
$this->connect($dbhost, $dbuser, $dbpw, $dbname, $charset, $pconnect, $quiet);
}
else
{
$this->settings = array(
'dbhost' => $dbhost,
'dbuser' => $dbuser,
'dbpw' => $dbpw,
'dbname' => $dbname,
'charset' => $charset,
'pconnect' => $pconnect
);
}
}
function connect($dbhost, $dbuser, $dbpw, $dbname = '', $charset = 'utf8', $pconnect = 0, $quiet = 0)
{
if ($pconnect)
{
if (!($this->link_id = @mysql_pconnect($dbhost, $dbuser, $dbpw)))
{
if (!$quiet)
{
$this->ErrorMsg("Can't pConnect MySQL Server($dbhost)!");
}
return false;
}
}
else
{
if (PHP_VERSION >= '4.2')
{
$this->link_id = @mysql_connect($dbhost, $dbuser, $dbpw, true);
}
else
{
$this->link_id = @mysql_connect($dbhost, $dbuser, $dbpw);
mt_srand((double)microtime() * 1000000); // 对 PHP 4.2 以下的版本进行随机数函数的初始化工作
}
if (!$this->link_id)
{
if (!$quiet)
{
$this->ErrorMsg("Can't Connect MySQL Server($dbhost)!");
}
return false;
}
}
$this->dbhash = md5($this->root_path . $dbhost . $dbuser . $dbpw . $dbname);
$this->version = mysql_get_server_info($this->link_id);
/* 如果mysql 版本是 4.1+ 以上，需要对字符集进行初始化 */
if ($this->version > '4.1')
{
if ($charset != 'latin1')
{
mysql_query("SET character_set_connection=$charset, character_set_results=$charset, character_set_client=binary", $this->link_id);
}
if ($this->version > '5.0.1')
{
mysql_query("SET sql_mode=''", $this->link_id);
}
}
$sqlcache_config_file = $this->root_path . $this->cache_data_dir . 'sqlcache_config_file_' . $this->dbhash . '.php';
@include($sqlcache_config_file);
$this->starttime = time();
if ($this->max_cache_time && $this->starttime > $this->mysql_config_cache_file_time + $this->max_cache_time)
{
if ($dbhost != '.')
{
$result = mysql_query("SHOW VARIABLES LIKE 'basedir'", $this->link_id);
$row = mysql_fetch_assoc($result);
if (!empty($row['Value']{1}) && $row['Value']{1} == ':' && !empty($row['Value']{2}) && $row['Value']{2} == "\\")
{
$this->platform = 'WINDOWS';
}
else
{
$this->platform = 'OTHER';
}
}
else
{
$this->platform = 'WINDOWS';
}
if ($this->platform == 'OTHER' &&
($dbhost != '.' && strtolower($dbhost) != 'localhost:3306' && $dbhost != '127.0.0.1:3306') ||
(PHP_VERSION >= '5.1' && date_default_timezone_get() == 'UTC'))
{
$result = mysql_query("SELECT UNIX_TIMESTAMP() AS timeline, UNIX_TIMESTAMP('" . date('Y-m-d H:i:s', $this->starttime) . "') AS timezone", $this->link_id);
$row = mysql_fetch_assoc($result);
if ($dbhost != '.' && strtolower($dbhost) != 'localhost:3306' && $dbhost != '127.0.0.1:3306')
{
$this->timeline = $this->starttime - $row['timeline'];
}
if (PHP_VERSION >= '5.1' && date_default_timezone_get() == 'UTC')
{
$this->timezone = $this->starttime - $row['timezone'];
}
}
$content = '<' . "?php\r\n" .
'$this->mysql_config_cache_file_time = ' . $this->starttime . ";\r\n" .
'$this->timeline = ' . $this->timeline . ";\r\n" .
'$this->timezone = ' . $this->timezone . ";\r\n" .
'$this->platform = ' . "'" . $this->platform . "';\r\n?" . '>';
@file_put_contents($sqlcache_config_file, $content);
}
/* 选择数据库 */
if ($dbname)
{
if (mysql_select_db($dbname, $this->link_id) === false )
{
if (!$quiet)
{
$this->ErrorMsg("Can't select MySQL database($dbname)!");
}
return false;
}
else
{
return true;
}
}
else
{
return true;
}
}
function select_database($dbname)
{
return mysql_select_db($dbname, $this->link_id);
}
function set_mysql_charset($charset)
{
/* 如果mysql 版本是 4.1+ 以上，需要对字符集进行初始化 */
if ($this->version > '4.1')
{
if (in_array(strtolower($charset), array('gbk', 'big5', 'utf-8', 'utf8')))
{
$charset = str_replace('-', '', $charset);
}
if ($charset != 'latin1')
{
mysql_query("SET character_set_connection=$charset, character_set_results=$charset, character_set_client=binary", $this->link_id);
}
}
}
function fetch_array($query, $result_type = MYSQL_ASSOC)
{
return mysql_fetch_array($query, $result_type);
}
function query($sql, $type = '')
{
if ($this->link_id === NULL)
{
$this->connect($this->settings['dbhost'], $this->settings['dbuser'], $this->settings['dbpw'], $this->settings['dbname'], $this->settings['charset'], $this->settings['pconnect']);
$this->settings = array();
}
if ($this->queryCount++ <= 99)
{
$this->queryLog[] = $sql;
}
if ($this->queryTime == '')
{
if (PHP_VERSION >= '5.0.0')
{
$this->queryTime = microtime(true);
}
else
{
$this->queryTime = microtime();
}
}
/* 当当前的时间大于类初始化时间的时候，自动执行 ping 这个自动重新连接操作 */
if (PHP_VERSION >= '4.3' && time() > $this->starttime + 1)
{
mysql_ping($this->link_id);
}
if (!($query = mysql_query($sql, $this->link_id)) && $type != 'SILENT')
{
$this->error_message[]['message'] = 'MySQL Query Error';
$this->error_message[]['sql'] = $sql;
$this->error_message[]['error'] = mysql_error($this->link_id);
$this->error_message[]['errno'] = mysql_errno($this->link_id);
$this->ErrorMsg();
return false;
}
if (defined('DEBUG_MODE') && (DEBUG_MODE & 8) == 8)
{
$logfilename = $this->root_path . DATA_DIR . '/mysql_query_' . $this->dbhash . '_' . date('Y_m_d') . '.log';
$str = $sql . "\n\n";
if (PHP_VERSION >= '5.0')
{
file_put_contents($logfilename, $str, FILE_APPEND);
}
else
{
$fp = @fopen($logfilename, 'ab+');
if ($fp)
{
fwrite($fp, $str);
fclose($fp);
}
}
}
return $query;
}
function affected_rows()
{
return mysql_affected_rows($this->link_id);
}
function error()
{
return mysql_error($this->link_id);
}
function errno()
{
return mysql_errno($this->link_id);
}
function result($query, $row)
{
return @mysql_result($query, $row);
}
function num_rows($query)
{
return mysql_num_rows($query);
}
function num_fields($query)
{
return mysql_num_fields($query);
}
function free_result($query)
{
return mysql_free_result($query);
}
function insert_id()
{
return mysql_insert_id($this->link_id);
}
function fetchRow($query)
{
return mysql_fetch_assoc($query);
}
function fetch_fields($query)
{
return mysql_fetch_field($query);
}
function version()
{
return $this->version;
}
function ping()
{
if (PHP_VERSION >= '4.3')
{
return mysql_ping($this->link_id);
}
else
{
return false;
}
}
function escape_string($unescaped_string)
{
if (PHP_VERSION >= '4.3')
{
return mysql_real_escape_string($unescaped_string);
}
else
{
return mysql_escape_string($unescaped_string);
}
}
function close()
{
return mysql_close($this->link_id);
}
function ErrorMsg($message = '', $sql = '')
{
if ($message)
{
echo "<b>ECSHOP info</b>: $message\n\n<br /><br />";
//print('<a href="http://faq.comsenz.com/?type=mysql&dberrno=2003&dberror=Can%27t%20connect%20to%20MySQL%20server%20on" target="_blank">http://faq.comsenz.com/</a>');
}
else
{
echo "<b>MySQL server error report:";
print_r($this->error_message);
//echo "<br /><br /><a href='http://faq.comsenz.com/?type=mysql&dberrno=" . $this->error_message[3]['errno'] . "&dberror=" . urlencode($this->error_message[2]['error']) . "' target='_blank'>http://faq.comsenz.com/</a>";
}
exit;
}
/* 仿真 Adodb 函数 */
function selectLimit($sql, $num, $start = 0)
{
if ($start == 0)
{
$sql .= ' LIMIT ' . $num;
}
else
{
$sql .= ' LIMIT ' . $start . ', ' . $num;
}
return $this->query($sql);
}
function getOne($sql, $limited = false)
{
if ($limited == true)
{
$sql = trim($sql . ' LIMIT 1');
}
$res = $this->query($sql);
if ($res !== false)
{
$row = mysql_fetch_row($res);
if ($row !== false)
{
return $row[0];
}
else
{
return '';
}
}
else
{
return false;
}
}
function getOneCached($sql, $cached = 'FILEFIRST')
{
$sql = trim($sql . ' LIMIT 1');
$cachefirst = ($cached == 'FILEFIRST' || ($cached == 'MYSQLFIRST' && $this->platform != 'WINDOWS')) && $this->max_cache_time;
if (!$cachefirst)
{
return $this->getOne($sql, true);
}
else
{
$result = $this->getSqlCacheData($sql, $cached);
if (empty($result['storecache']) == true)
{
return $result['data'];
}
}
$arr = $this->getOne($sql, true);
if ($arr !== false && $cachefirst)
{
$this->setSqlCacheData($result, $arr);
}
return $arr;
}
function getAll($sql)
{
$res = $this->query($sql);
if ($res !== false)
{
$arr = array();
while ($row = mysql_fetch_assoc($res))
{
$arr[] = $row;
}
return $arr;
}
else
{
return false;
}
}
function getAllCached($sql, $cached = 'FILEFIRST')
{
$cachefirst = ($cached == 'FILEFIRST' || ($cached == 'MYSQLFIRST' && $this->platform != 'WINDOWS')) && $this->max_cache_time;
if (!$cachefirst)
{
return $this->getAll($sql);
}
else
{
$result = $this->getSqlCacheData($sql, $cached);
if (empty($result['storecache']) == true)
{
return $result['data'];
}
}
$arr = $this->getAll($sql);
if ($arr !== false && $cachefirst)
{
$this->setSqlCacheData($result, $arr);
}
return $arr;
}
function getRow($sql, $limited = false)
{
if ($limited == true)
{
$sql = trim($sql . ' LIMIT 1');
}
$res = $this->query($sql);
if ($res !== false)
{
return mysql_fetch_assoc($res);
}
else
{
return false;
}
}
function getRowCached($sql, $cached = 'FILEFIRST')
{
$sql = trim($sql . ' LIMIT 1');
$cachefirst = ($cached == 'FILEFIRST' || ($cached == 'MYSQLFIRST' && $this->platform != 'WINDOWS')) && $this->max_cache_time;
if (!$cachefirst)
{
return $this->getRow($sql, true);
}
else
{
$result = $this->getSqlCacheData($sql, $cached);
if (empty($result['storecache']) == true)
{
return $result['data'];
}
}
$arr = $this->getRow($sql, true);
if ($arr !== false && $cachefirst)
{
$this->setSqlCacheData($result, $arr);
}
return $arr;
}
function getCol($sql)
{
$res = $this->query($sql);
if ($res !== false)
{
$arr = array();
while ($row = mysql_fetch_row($res))
{
$arr[] = $row[0];
}
return $arr;
}
else
{
return false;
}
}
function getColCached($sql, $cached = 'FILEFIRST')
{
$cachefirst = ($cached == 'FILEFIRST' || ($cached == 'MYSQLFIRST' && $this->platform != 'WINDOWS')) && $this->max_cache_time;
if (!$cachefirst)
{
return $this->getCol($sql);
}
else
{
$result = $this->getSqlCacheData($sql, $cached);
if (empty($result['storecache']) == true)
{
return $result['data'];
}
}
$arr = $this->getCol($sql);
if ($arr !== false && $cachefirst)
{
$this->setSqlCacheData($result, $arr);
}
return $arr;
}
function autoExecute($table, $field_values, $mode = 'INSERT', $where = '', $querymode = '')
{
$field_names = $this->getCol('DESC ' . $table);
$sql = '';
if ($mode == 'INSERT')
{
$fields = $values = array();
foreach ($field_names AS $value)
{
if (array_key_exists($value, $field_values) == true)
{
$fields[] = $value;
$values[] = "'" . $field_values[$value] . "'";
}
}
if (!empty($fields))
{
$sql = 'INSERT INTO ' . $table . ' (' . implode(', ', $fields) . ') VALUES (' . implode(', ', $values) . ')';
}
}
else
{
$sets = array();
foreach ($field_names AS $value)
{
if (array_key_exists($value, $field_values) == true)
{
$sets[] = $value . " = '" . $field_values[$value] . "'";
}
}
if (!empty($sets))
{
$sql = 'UPDATE ' . $table . ' SET ' . implode(', ', $sets) . ' WHERE ' . $where;
}
}
if ($sql)
{
return $this->query($sql, $querymode);
}
else
{
return false;
}
}
function autoReplace($table, $field_values, $update_values, $where = '', $querymode = '')
{
$field_descs = $this->getAll('DESC ' . $table);
$primary_keys = array();
foreach ($field_descs AS $value)
{
$field_names[] = $value['Field'];
if ($value['Key'] == 'PRI')
{
$primary_keys[] = $value['Field'];
}
}
$fields = $values = array();
foreach ($field_names AS $value)
{
if (array_key_exists($value, $field_values) == true)
{
$fields[] = $value;
$values[] = "'" . $field_values[$value] . "'";
}
}
$sets = array();
foreach ($update_values AS $key => $value)
{
if (array_key_exists($key, $field_values) == true)
{
if (is_int($value) || is_float($value))
{
$sets[] = $key . ' = ' . $key . ' + ' . $value;
}
else
{
$sets[] = $key . " = '" . $value . "'";
}
}
}
$sql = '';
if (empty($primary_keys))
{
if (!empty($fields))
{
$sql = 'INSERT INTO ' . $table . ' (' . implode(', ', $fields) . ') VALUES (' . implode(', ', $values) . ')';
}
}
else
{
if ($this->version() >= '4.1')
{
if (!empty($fields))
{
$sql = 'INSERT INTO ' . $table . ' (' . implode(', ', $fields) . ') VALUES (' . implode(', ', $values) . ')';
if (!empty($sets))
{
$sql .= 'ON DUPLICATE KEY UPDATE ' . implode(', ', $sets);
}
}
}
else
{
if (empty($where))
{
$where = array();
foreach ($primary_keys AS $value)
{
if (is_numeric($value))
{
$where[] = $value . ' = ' . $field_values[$value];
}
else
{
$where[] = $value . " = '" . $field_values[$value] . "'";
}
}
$where = implode(' AND ', $where);
}
if ($where && (!empty($sets) || !empty($fields)))
{
if (intval($this->getOne("SELECT COUNT(*) FROM $table WHERE $where")) > 0)
{
if (!empty($sets))
{
$sql = 'UPDATE ' . $table . ' SET ' . implode(', ', $sets) . ' WHERE ' . $where;
}
}
else
{
if (!empty($fields))
{
$sql = 'REPLACE INTO ' . $table . ' (' . implode(', ', $fields) . ') VALUES (' . implode(', ', $values) . ')';
}
}
}
}
}
if ($sql)
{
return $this->query($sql, $querymode);
}
else
{
return false;
}
}
function setMaxCacheTime($second)
{
$this->max_cache_time = $second;
}
function getMaxCacheTime()
{
return $this->max_cache_time;
}
function getSqlCacheData($sql, $cached = '')
{
$sql = trim($sql);
$result = array();
$result['filename'] = $this->root_path . $this->cache_data_dir . 'sqlcache_' . abs(crc32($this->dbhash . $sql)) . '_' . md5($this->dbhash . $sql) . '.php';
$data = @file_get_contents($result['filename']);
if (isset($data{23}))
{
$filetime = substr($data, 13, 10);
$data = substr($data, 23);
if (($cached == 'FILEFIRST' && time() > $filetime + $this->max_cache_time) || ($cached == 'MYSQLFIRST' && $this->table_lastupdate($this->get_table_name($sql)) > $filetime))
{
$result['storecache'] = true;
}
else
{
$result['data'] = @unserialize($data);
if ($result['data'] === false)
{
$result['storecache'] = true;
}
else
{
$result['storecache'] = false;
}
}
}
else
{
$result['storecache'] = true;
}
return $result;
}
function setSqlCacheData($result, $data)
{
if ($result['storecache'] === true && $result['filename'])
{
@file_put_contents($result['filename'], '<?php exit;?>' . time() . serialize($data));
clearstatcache();
}
}
/* 获取 SQL 语句中最后更新的表的时间，有多个表的情况下，返回最新的表的时间 */
function table_lastupdate($tables)
{
if ($this->link_id === NULL)
{
$this->connect($this->settings['dbhost'], $this->settings['dbuser'], $this->settings['dbpw'], $this->settings['dbname'], $this->settings['charset'], $this->settings['pconnect']);
$this->settings = array();
}
$lastupdatetime = '0000-00-00 00:00:00';
$tables = str_replace('`', '', $tables);
$this->mysql_disable_cache_tables = str_replace('`', '', $this->mysql_disable_cache_tables);
foreach ($tables AS $table)
{
if (in_array($table, $this->mysql_disable_cache_tables) == true)
{
$lastupdatetime = '2037-12-31 23:59:59';
break;
}
if (strstr($table, '.') != NULL)
{
$tmp = explode('.', $table);
$sql = 'SHOW TABLE STATUS FROM `' . trim($tmp[0]) . "` LIKE '" . trim($tmp[1]) . "'";
}
else
{
$sql = "SHOW TABLE STATUS LIKE '" . trim($table) . "'";
}
$result = mysql_query($sql, $this->link_id);
$row = mysql_fetch_assoc($result);
if ($row['Update_time'] > $lastupdatetime)
{
$lastupdatetime = $row['Update_time'];
}
}
$lastupdatetime = strtotime($lastupdatetime) - $this->timezone + $this->timeline;
return $lastupdatetime;
}
function get_table_name($query_item)
{
$query_item = trim($query_item);
$table_names = array();
/* 判断语句中是不是含有 JOIN */
if (stristr($query_item, ' JOIN ') == '')
{
/* 解析一般的 SELECT FROM 语句 */
if (preg_match('/^SELECT.*?FROM\s*((?:`?\w+`?\s*\.\s*)?`?\w+`?(?:(?:\s*AS)?\s*`?\w+`?)?(?:\s*,\s*(?:`?\w+`?\s*\.\s*)?`?\w+`?(?:(?:\s*AS)?\s*`?\w+`?)?)*)/is', $query_item, $table_names))
{
$table_names = preg_replace('/((?:`?\w+`?\s*\.\s*)?`?\w+`?)[^,]*/', '\1', $table_names[1]);
return preg_split('/\s*,\s*/', $table_names);
}
}
else
{
/* 对含有 JOIN 的语句进行解析 */
if (preg_match('/^SELECT.*?FROM\s*((?:`?\w+`?\s*\.\s*)?`?\w+`?)(?:(?:\s*AS)?\s*`?\w+`?)?.*?JOIN.*$/is', $query_item, $table_names))
{
$other_table_names = array();
preg_match_all('/JOIN\s*((?:`?\w+`?\s*\.\s*)?`?\w+`?)\s*/i', $query_item, $other_table_names);
return array_merge(array($table_names[1]), $other_table_names[1]);
}
}
return $table_names;
}
/* 设置不允许进行缓存的表 */
function set_disable_cache_tables($tables)
{
if (!is_array($tables))
{
$tables = explode(',', $tables);
}
foreach ($tables AS $table)
{
$this->mysql_disable_cache_tables[] = $table;
}
array_unique($this->mysql_disable_cache_tables);
}
}
本文作者为张小编，转载请注明。