3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'Hi'; echo base64_encode($str); // VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw== $str = 'VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw=='; echo base64_decode($str);

preferences:
57.57 ms | 402 KiB | 5 Q