3v4l.org

run code in 300+ PHP versions simultaneously
<?php class foo { public function setConfigParam( $sName, $sValue ) { if ( isset( $this->$sName ) ) { $this->$sName = $sValue; } else { $this->_aConfigParams[$sName] = $sValue; } } 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; } } $foo = new foo();
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Creation of dynamic property foo::$a is deprecated in /in/HlmPW on line 15 Deprecated: Creation of dynamic property foo::$b is deprecated in /in/HlmPW on line 16 Deprecated: Creation of dynamic property foo::$val is deprecated in /in/HlmPW on line 17 hello hi howdy howdy Deprecated: Creation of dynamic property foo::$_aConfigParams is deprecated in /in/HlmPW on line 9 Warning: Undefined variable $aVariableName in /in/HlmPW on line 35 Warning: Undefined property: foo::$ in /in/HlmPW on line 35
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
hello hi howdy howdy Warning: Undefined variable $aVariableName in /in/HlmPW on line 35 Warning: Undefined property: foo::$ in /in/HlmPW on line 35
Output for 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33
hello hi howdy howdy Notice: Undefined variable: aVariableName in /in/HlmPW on line 35 Notice: Undefined property: foo::$ in /in/HlmPW on line 35
Output for 7.3.32 - 7.3.33
hello hi howdy howdy
Output for 7.0.0 - 7.0.20
hello hi howdy howdy Notice: Undefined variable: aVariableName in /in/HlmPW on line 35 Fatal error: Uncaught Error: Cannot access empty property in /in/HlmPW:35 Stack trace: #0 /in/HlmPW(47): foo->__construct() #1 {main} thrown in /in/HlmPW on line 35
Process exited with code 255.
Output for 5.0.5, 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
hello hi howdy howdy Notice: Undefined variable: aVariableName in /in/HlmPW on line 35 Fatal error: Cannot access empty property in /in/HlmPW on line 35
Process exited with code 255.
Output for 5.0.4
hello hi howdy howdy Notice: Undefined variable: aVariableName in /in/HlmPW on line 35 Notice: Undefined property: foo::$ in /in/HlmPW on line 35
Output for 5.0.0 - 5.0.3
hello hi howdy howdy Notice: Undefined variable: aVariableName in /in/HlmPW on line 35 Notice: Undefined property: foo::$ in /in/HlmPW on line 35
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/HlmPW on line 4
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/HlmPW on line 4
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/HlmPW on line 4
Process exited with code 255.

preferences:
227.89 ms | 401 KiB | 314 Q