3v4l.org

run code in 300+ PHP versions simultaneously
<?php class A { private $foo = 'bar'; } $a = new A; sudo echo $a->foo;
Output for 5.4.1 - 5.4.45, 5.5.24 - 5.5.29, 5.6.8 - 5.6.13
Parse error: syntax error, unexpected 'echo' (T_ECHO) in /in/3VBT3 on line 8
Process exited with code 255.

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