Online PHP editor | refs for f6Y1h

@ 2015-04-23T08:05:01Z

<?php

function isInteger($a){
    return (string)(int)$a === (string)$a;
}

var_dump(isInteger(1));
var_dump(isInteger('1'));
var_dump(isInteger('a'));
var_dump(isInteger('1a'));
var_dump(isInteger('11111'));