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<?php class foo { function __construct() { $this->a = "hello"; $this->b = "hi"; $this->val = "howdy"; $val = "a"; echo $this->{$val}; // outputs "hello" echo "\n"; $val = "b"; echo $$b; // outputs "hi" echo "\n"; echo $$val; //outputs "howdy" echo "\n"; echo $$val; } } $foo = new foo();
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Creation of dynamic property foo::$a is deprecated in /in/Bv6M3 on line 5 Deprecated: Creation of dynamic property foo::$b is deprecated in /in/Bv6M3 on line 6 Deprecated: Creation of dynamic property foo::$val is deprecated in /in/Bv6M3 on line 7 hello Warning: Undefined variable $b in /in/Bv6M3 on line 15 Warning: Undefined variable $ in /in/Bv6M3 on line 15 Warning: Undefined variable $b in /in/Bv6M3 on line 18 Warning: Undefined variable $b in /in/Bv6M3 on line 21
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
hello Warning: Undefined variable $b in /in/Bv6M3 on line 15 Warning: Undefined variable $ in /in/Bv6M3 on line 15 Warning: Undefined variable $b in /in/Bv6M3 on line 18 Warning: Undefined variable $b in /in/Bv6M3 on line 21
Output for 5.0.4 - 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, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
hello Notice: Undefined variable: b in /in/Bv6M3 on line 15 Notice: Undefined variable: in /in/Bv6M3 on line 15 Notice: Undefined variable: b in /in/Bv6M3 on line 18 Notice: Undefined variable: b in /in/Bv6M3 on line 21
Output for 7.3.32 - 7.3.33
hello
Output for 5.0.0 - 5.0.3
hello Notice: Undefined variable: b in /in/Bv6M3 on line 15 Notice: Undefined variable: in /in/Bv6M3 on line 15 Notice: Undefined variable: b in /in/Bv6M3 on line 18 Notice: Undefined variable: b in /in/Bv6M3 on line 21
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9
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329.4 ms | 402 KiB | 459 Q