<?php
echo file_get_contents(__FILE__);
echo PHP_EOL . '=============' . PHP_EOL;
system('who');
=============
sh: 1: who: not found
Output for 4.3.1 - 4.3.9, 5.0.0 - 5.0.1
<?php
echo file_get_contents(__FILE__);
echo PHP_EOL . '=============' . PHP_EOL;
system('who');
Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/S5KSu on line 3
Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/S5KSu on line 3
PHP_EOL=============PHP_EOLsh: 1: who: not found
Output for 4.3.0
<?php
echo file_get_contents(__FILE__);
echo PHP_EOL . '=============' . PHP_EOL;
system('who');
Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/S5KSu on line 3
Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/S5KSu on line 3
PHP_EOL=============PHP_EOL