前一秒还好好的，突然提示这个。

Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in /Applications/XAMPP/xamppfiles/htdocs/phptest1/needlist.php

回复内容：

Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in /Applications/XAMPP/xamppfiles/htdocs/phptest1/needlist.php

php的mysql扩展在php 5.5被标识为弃用（deprecated）
在php7中被删除

请用mysqli或者pdo替换

php的mysql的确被弃用了。不过还是可以用的。把错误级别修改一下就行了