用正则吧 $reg = '/(this is csdn)/i'; $rep = '***'; $methtml_head = "example this is csdn test"; echo preg_replace($reg,$rep,$methtml_head);
典型的正则替换$reg = "/(this is csdn)/i"; //正则 $methtml_head = "if this ia example string include this is csdn"; //原始字符串 $replace = "**"; //这是替换后的显示字符串 $after_filter = preg_replace($reg,$replace,$methtml_head); echo $after_filter;
$reg = '/(this is csdn)/i';
$rep = '***';
$methtml_head = "example this is csdn test";
echo preg_replace($reg,$rep,$methtml_head);
$methtml_head = "if this ia example string include this is csdn"; //原始字符串
$replace = "**"; //这是替换后的显示字符串
$after_filter = preg_replace($reg,$replace,$methtml_head);
echo $after_filter;