if (!function_exists('mysql_connect')) die ('Call to undefined function: mysql_connect(). Please install the MySQL Connector for PHP');
详细介绍一下,好处是什么,不写又怎么样,
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php一段代码是什么意思啊,
if (!function_exists('mysql_connect')) die ('Call to undefined function: mysql_connect(). Please install the MySQL Connector for PHP'); 详细介绍一下,好处是什么,不写又怎么样,