- nl2br: documentation ( source)
- file_get_contents: documentation ( source)
- var_dump: documentation ( source)
- sys_get_temp_dir: documentation ( source)
- tempnam: documentation ( source)
- file_put_contents: documentation ( source)
<?php
$file = tempnam(sys_get_temp_dir());
file_put_contents($file, <<<HEREDOC
lots
of
lines
HEREDOC);
var_dump(nl2br(file_get_contents($file)));