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run code in 300+ PHP versions simultaneously
<?php class Foo { public $a; function a() {var_dump("a");} } $a = new Foo; $a->a = function() { var_dump("b"); } $a->a(); ?>
Output for 5.4.0 - 5.4.17
Parse error: syntax error, unexpected '$a' (T_VARIABLE) in /in/TLTZY on line 5
Process exited with code 255.
Output for 5.3.0 - 5.3.27
Parse error: syntax error, unexpected T_VARIABLE in /in/TLTZY on line 5
Process exited with code 255.

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