php判断字符串是否存在
解决方法：使用 ===or !==
if(stripos($sql, "insert") === 0){
$excuteResult = mysql_query($sql);
if($excuteResult){
$sql = $sql2."where id = (select max(id) from subway2)";
}
} else if(stripos($sql, "delete") === 0 || stripos($sql, "update") === 0){
if (strpos($foo, “my”)===0) { echo(‘I find!’);}
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