3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php // Everything you enter here will be executed by our servers. Try it! $sql="SELECT * FROM table_name WHERE username= '{$_SESSION['user']}'" ; echo $sql;
Output for 5.0.4 - 5.6.28, 7.0.0 - 7.1.0
Notice: Undefined variable: _SESSION in /in/5Zfk8 on line 4 SELECT * FROM table_name WHERE username= ''
Output for hhvm-3.10.0 - 3.12.0
Notice: Undefined index: user in /in/5Zfk8 on line 4 SELECT * FROM table_name WHERE username= ''
Output for 4.3.0 - 5.0.3
Notice: Undefined variable: _SESSION in /in/5Zfk8 on line 4 SELECT * FROM table_name WHERE username= ''