var_dump and print_r cause white screen

Actually, memory was exhausted. Someone has copy-pasted an actual 2MB base64-encoded image into the post content, var_dump was trying to output it. Had to delete the image via PHPMyAdmin, because the WP editor won’t open. Once it had been deleted, the problem was gone.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)