php 数组模糊匹配

$list = array(); // 匹配后的结果
$arr = array("abcd","abef","efgh");
$search_str = "ab"; // 搜索的字符串
foreach($arr as $key=>$val ){
if (strstr( $val , $search_str ) !== false ){
array_push($list, $val);
}
}
$list 即为模糊匹配后的结果：$list = array("abcd","abef");