Php equivalent for .slice() of jquery

slice-php.php

<?php

function strSlice($str, $start, $end) {
	$end = $end - $start;
	return substr($str, $start, $end);
}

$name = 'migthegreek';
// Get substr from index 3 to 6
echo strSlice($name, 3, 6);
// Outputs 'the'