Does PHP have equivalent string length function than JavaScript's string length function? ("‍♂️".length === 7, int(5), int(17))

Question

Please see this example:

In JavaScript

console.log('‍♂️'.length) // 7

In PHP

<?php

var_dump(strlen("‍♂️")); // int(17)
var_dump(mb_strlen("‍♂️")); // int(5)

How can I make sure my backend count my string length exactly as my frontend?