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run code in 150+ php & hhvm versions
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<?php class Data { public $foo = 'bar'; public function wtf() { unset($this->foo); } } $d = new Data; var_dump('foo exists', isset($d->foo)); $d->wtf(); var_dump('foo exists', isset($d->foo));
Output for 5.0.0 - 7.1.0
string(10) "foo exists" bool(true) string(10) "foo exists" bool(false)
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/c3Cl0 on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/c3Cl0 on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/c3Cl0 on line 5
Process exited with code 255.