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<?php class A { public $avar = true; public function __isset($varname) { var_dump('__isset called'); return true; } } class B extends A { public function hasAVar(){ return property_exists($this, 'avar'); } public function hasBVar(){ return property_exists($this, 'bvar'); } public function issetVars($property) {return isset($this->{$property}); } } $b = new B(); var_dump($b->issetVars('avar')); var_dump($b->issetVars('bvar'));
Output for 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 - 7.1.33, 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
bool(true) string(14) "__isset called" bool(true)
Output for 5.0.0 - 5.0.5
bool(true) 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/o7mHe on line 2
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, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/o7mHe on line 2
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/o7mHe on line 2
Process exited with code 255.
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