- var_dump: documentation ( source)
- stream_get_contents: documentation ( source)
- fwrite: documentation ( source)
- fopen: documentation ( source)
<?php
var_dump($x = fopen("data:text/plain,trololololo", 'r+'));
var_dump(fwrite($x, '123'));
var_dump(stream_get_contents($x));
echo "\r\n";
var_dump($x = fopen("data:text/plain,trololololo", 'w+'));
var_dump(fwrite($x, '123'));
var_dump(stream_get_contents($x));
echo "\r\n";
var_dump($x = fopen("data:text/plain,trololololo", 'a+'));
var_dump(fwrite($x, '123'));
var_dump(stream_get_contents($x));
echo "\r\n";