<?php
$a = 1;
echo var_dump($a) . "\n";
echo '$a == 1: ';
var_dump($a == 1) . "\n";
echo '$a == "1": ';
echo var_dump($a == "1") . "\n";
echo '$a === 1: ';
var_dump($a === 1) . "\n";
echo '$a === "1": ';
echo var_dump($a === "1") . "\n";
$a = "1";
echo var_dump($a) . "\n";
echo '$a == 1: ';
var_dump($a == 1) . "\n";
echo '$a == "1": ';
echo var_dump($a == "1") . "\n";
echo '$a === 1: ';
var_dump($a === 1) . "\n";
echo '$a === "1": ';
var_dump($a === "1") . "\n";
?>