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run code in 150+ php & hhvm versions
Bugs & Features
<?php namespace foo; class MyException extends \Exception {} $class = '\\foo\\MyException'; echo "$class\n", '1) ', var_export(is_subclass_of($class, "\\Exception"), true), "\n", '2) ', var_export(is_subclass_of("\\foo\\MyException", "\\Exception"), true), "\n", '3) ', var_export(assert('is_subclass_of($class, "\\Exception")'), true), "\n", '4) ', var_export(assert('is_subclass_of("\\foo\\MyException", "\\Exception")'), true), "\n";
Output for 7.0.1 - 7.1.0
\foo\MyException 1) true 2) true 3) true 4) Warning: assert(): Assertion "is_subclass_of("\foo\MyException", "\Exception")" failed in /in/nN2Kc on line 13 false
Output for 5.3.7 - 5.6.21, 7.0.0
\foo\MyException 1) true 2) true 3) true 4) Warning: assert(): Assertion "is_subclass_of("\foo\MyException", "\Exception")" failed in /in/nN2Kc on line 13 NULL
Output for hhvm-3.12.0
\foo\MyException 1) true 2) true 3) true 4) Warning: assert(): Assertion "is_subclass_of($class, "\Exception")" failed in /in/nN2Kc on line 13 NULL
Output for hhvm-3.10.0
\foo\MyException 1) true 2) true 3) true 4) true
Output for 5.3.0 - 5.3.6
\foo\MyException 1) true 2) true 3) true 4) Warning: Unknown class passed as parameter in /in/nN2Kc(13) : assert code on line 1 Warning: assert(): Assertion "is_subclass_of("\foo\MyException", "\Exception")" failed in /in/nN2Kc on line 13 NULL
Output for 5.2.3 - 5.2.17
Parse error: syntax error, unexpected T_STRING in /in/nN2Kc on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.2
<br /> <b>Parse error</b>: syntax error, unexpected T_STRING in <b>/in/nN2Kc</b> on line <b>3</b><br />
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
<br /> <b>Parse error</b>: parse error, unexpected T_STRING in <b>/in/nN2Kc</b> on line <b>3</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error in <b>/in/nN2Kc</b> on line <b>3</b><br />
Process exited with code 255.