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run code in 150+ php & hhvm versions
Bugs & Features
<?php class foo { public $aVariableName = 'aValue'; function __construct() { $this->a = "hello"; $this->b = "hi"; $this->val = "howdy"; $val = "a"; echo $this->{$val}; // outputs "hello" echo "\n"; $val = "b"; echo $this->{$val}; // outputs "hi" echo "\n"; echo $this->val; //outputs "howdy" echo "\n"; echo $this->{"val"}; $this->setConfigParam('aVariableName', array('one', 'two', 'three')); // echo $this->$aVariableName; $name = 'aVariableName'; echo "\n"; var_dump($this->{$name}); echo "\n"; var_dump($this->_aConfigParams); } public function setConfigParam( $sName, $sValue ) { if ( isset( $this->$sName ) ) { $this->$sName = $sValue; } else { $this->_aConfigParams[$sName] = $sValue; } } } $foo = new foo();
Output for 5.2.6 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
hello hi howdy howdy array(3) { [0]=> string(3) "one" [1]=> string(3) "two" [2]=> string(5) "three" } Notice: Undefined property: foo::$_aConfigParams in /in/GC81p on line 37 NULL
Output for hhvm-3.10.0
hello hi howdy howdy array(3) { [0]=> string(3) "one" [1]=> string(3) "two" [2]=> string(5) "three" } Notice: Undefined property: foo::$_aConfigParams in /in/GC81p on line -1 NULL
Output for 5.0.0 - 5.2.5
hello hi howdy howdy array(3) { [0]=> string(3) "one" [1]=> string(3) "two" [2]=> string(5) "three" } Notice: Undefined property: foo::$_aConfigParams in /in/GC81p on line 37 NULL
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/GC81p 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/GC81p 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/GC81p on line 5
Process exited with code 255.