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e<?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; $name = 'aVariableName'; var_dump($this->$name); var_dump($this->_aConfigParams); } public function setConfigParam( $sName, $sValue ) { if ( isset( $this->$sName ) ) { $this->$sName = $sValue; } else { $this->_aConfigParams[$sName] = $sValue; } } } $foo = new foo();
Output for 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
e Deprecated: Creation of dynamic property foo::$a is deprecated in /in/l9E0X on line 9 Deprecated: Creation of dynamic property foo::$b is deprecated in /in/l9E0X on line 10 Deprecated: Creation of dynamic property foo::$val is deprecated in /in/l9E0X on line 11 hello hi howdy howdyarray(3) { [0]=> string(3) "one" [1]=> string(3) "two" [2]=> string(5) "three" } Warning: Undefined property: foo::$_aConfigParams in /in/l9E0X on line 33 NULL
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27
ehello hi howdy howdyarray(3) { [0]=> string(3) "one" [1]=> string(3) "two" [2]=> string(5) "three" } Warning: Undefined property: foo::$_aConfigParams in /in/l9E0X on line 33 NULL
Output for 5.2.6 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33
ehello hi howdy howdyarray(3) { [0]=> string(3) "one" [1]=> string(3) "two" [2]=> string(5) "three" } Notice: Undefined property: foo::$_aConfigParams in /in/l9E0X on line 33 NULL
Output for 7.3.32 - 7.3.33
ehello hi howdy howdyarray(3) { [0]=> string(3) "one" [1]=> string(3) "two" [2]=> string(5) "three" } NULL
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.5
ehello hi howdy howdyarray(3) { [0]=> string(3) "one" [1]=> string(3) "two" [2]=> string(5) "three" } Notice: Undefined property: foo::$_aConfigParams in /in/l9E0X on line 33 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/l9E0X on line 5
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/l9E0X 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/l9E0X on line 5
Process exited with code 255.

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