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<?php class obj { } function ret_true() { return true; } function ret_false() { return false; } function ret_obj() { return new obj(); } function ret_std() { return new stdClass(); } if ($a = ret_true() == true) { var_dump('true:true'); } if ($a = ret_true() == false) { var_dump('true:false'); } if ($a = ret_false() == true) { var_dump('false:true'); } if ($a = ret_false() == false) { var_dump('false:false'); } if ($a = ret_obj() instanceof obj) { var_dump('obj:obj'); } if ($a = ret_obj() instanceof stdClass) { var_dump('obj:std'); } if ($a = ret_std() instanceof obj) { var_dump('std:obj'); } if ($a = ret_std() instanceof stdClass) { var_dump('std:std'); }
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(9) "true:true" string(11) "false:false" string(7) "obj:obj" string(7) "std:std"
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/9aiIh on line 34
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING in /in/9aiIh on line 34
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/9aiIh on line 34
Process exited with code 255.

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