Why can't this code print correctly ?

Question

Why does this code
<?php
echo 'a:/a';
?>

print '..\Playground\' ?

https://code.sololearn.com/wFDfgaO5Bm5x/#php

Answer 1

More like it created a file path I think? Magic creates an exception it seems. Ask Google .

Answer 2

No clue same for all ABC not #s tried 'hello:/world' cracked me up.

Answer 3

Magic Constants perhaps?

Answer 4

I think it's a bug in Sololearn app.