- assert: documentation ( source)
<?php
function f($a,$b){return(int)$a==(int)$b;}
$testCases = [
[["0001", "1 "], true],
[["1450", "1450 "], true],
[["0010001 ", " 10001 "], true],
[["0010000", " 10 "], false],
[["101023", "101024"], false],
];
foreach ($testCases as $testCase) {
list($values, $expected) = $testCase;
assert($expected === f(...$values));
}