- var_dump: documentation ( source)
<?php
$x = new SplFileInfo('data%3Aimage%2Fpng%3Bbase64%2CiVBORw0KGgoAAAANSUhEUgAAAZAAAABLCAYAAABeMdGUAAACBElEQVR4nO3dIW7cQBgG0A8E5Ag%2BRg4QmIMYFBUFtryVIhWEN6AwIEcILC2tAoIKqhwjBfYo4%2BnW6ziVunHfk6zV%2FhqPjfxpxjNyAgAAAAAAAAAAAAAAAAAAAABAkqMkp0ke%2F%2FWNAPC69BnCoxwAMOs0yWWSnxEgACzQJXmfaWi8iQABYEaX5C5DUHxPcpXkLMN7EAECwE51eNyN%2F2sCBIDfdElu8ufwSAQIAI165HGT3eGRCBAAKvumrWoCBIAkzwuPRIAAkOeH');
var_dump($x->openFile());