如何确定$ match是否在$ string中？

Question

$string = "Test String for the test";
$match = "test string";

How to determine if $match is in $string?

Answer 1

You can use stripos to find the position of $match in $string with a case-insensitive search:

$pos = stripos($string, $match);

Note to compare this with a type-safe comparison operator like === or !== . Because if $match is at the begin of $string like in this case, stripos returns 0 and (boolean) 0 === false .

Answer 2

use strpos to check if it is in the string. API Link

For case insensitive, use stripos . API Link

Answer 3

使用stristr($haystack, $needle) ： http : stristr($haystack, $needle)

$boolean = stristr($string, $match);