昨天幫一朋友配置服務器結果發現apache日志中有PHP Warning: PHP Startup: Unable to load dynamic library 提示了，然后調試數據庫連接發現提示Call to undefined function mysql_connect()錯誤，這樣就想到了是mysql沒有加載成功了，下面我們一起來看看問題解決辦法。
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連接代碼
<?php
echo 'a';
$cn = mysql_connect("localhost",'www.111cn.net','你的mysql用戶密碼') or die(mysql_error());
if( $cn )
{
echo phpinfo();
}
else
{
echo 'mysql connect fail';
}
?>
因為服務器使用的是安全php.ini所在沒有錯誤顯示，於時相看了apache安裝目錄的logs的errors.log日志文
件發現如下錯誤
PHP Warning: PHP Startup: Unable to load dynamic library
'D:\myserver\php\ext\php_mysql.dll' - xd5xd2xb2xbbxb5xbdxd6xb8xb6xa8xb5xc4xc4
xa3xbfxe9xa1xa3rn in Unknown on line 0
PHP Warning: PHP Startup: Unable to load dynamic library
'D:\myserver\php\ext\php_mysqli.dll' - xd5xd2xb2xbbxb5xbdxd6xb8xb6xa8xb5xc4
xc4xa3xbfxe9xa1xa3rn in Unknown on line 0
[Tue Dec 31 09:05:15 2013] [error] [client 127.0.0.1] PHP Fatal error: Call to undefined
function mysql_connect() in E:\www\a.php on line 2, referer: www.111cn.net[Tue Dec 31 09:05:16 2013] [error] [client 127.0.0.1] PHP Fatal error: Call to undefined
function mysql_connect() in E:\www\a.php on line 2, referer: http://localhost/
[Tue Dec 31 09:05:17 2013] [error] [client 127.0.0.1] PHP Fatal error: Call to undefined
function mysql_connect() in E:\www\a.php on line 2, referer: http://localhost/
[Tue Dec 31 09:06:04 2013] [error] [client 127.0.0.1] PHP Fatal error: Call to undefined
function mysql_connect() in E:\www\a.php on line 3, referer: http://localhost/
[Tue Dec 31 09:06:05 2013] [error] [client 127.0.0.1] PHP Fatal error: Call to undefined
function mysql_connect() in E:\www\a.php on line 3, referer: http://localhost/
[Tue Dec 31 09:06:05 2013] [error] [client 127.0.0.1] PHP Fatal error: Call to undefined
function mysql_connect() in E:\www\a.php on line 3, referer: http://localhost/
[Tue Dec 31 09:06:05 2013] [error] [client 127.0.0.1] PHP Fatal error: Call to undefined
function mysql_connect() in E:\www\a.php on line 3, referer: http://localhost/
[Tue Dec 31 09:06:06 2013] [error] [client 127.0.0.1] PHP Fatal error: Call to undefined
function mysql_connect() in E:\www\a.php on line 3, referer: www.111cn.net
[Tue Dec 31 09:06:06 2013] [error] [client 127.0.0.1] PHP Fatal error: Call to undefined
function mysql_connect() in E:\www\a.php on line 3, referer: http://localhost/
日志中有這么一句
PHP Startup: Unable to load dynamic library 'D:\myserver\php\ext\php_mysql.dll' 這個意思是
沒有加載成功php_mysql文件了，還有一點是提示 PHP Fatal error: Call to undefined function
mysql_connect(),，這個是mysql沒有連接成功也就是加載mysql庫失敗了，根據分析有兩種可能一是文件不
存在，這個問題不存因為我以前用的是這個php解壓包，2是服務器環境變量問題，如果是環境變量有兩種解
決辦法
1，是直接在windows增加環境變量
2，直接把在d:PHP里找到php5ts.dll,libmysql.dll將其復制到c:/winnt/system32下(winNT/2000的機器),
而winXP/2003是復制到c:/windows/system32下即可
記住復制到system目錄之后必須重記apache環境，如我再測試http://localhost/a.php 就可以看到
輸出的phpinfo相關信息了，本站原創文章轉載注明來源www.111cn.net