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<?php class Foo { public $arr = array("test"); function bar($str) { echo self::{$arr[0]}($str); } static function test($var) { echo "Testing: $var\n"; } } (new Foo)->bar("bla");
Output for 8.3.0 - 8.3.6
Warning: Undefined variable $arr in /in/1vbDI on line 7 Warning: Trying to access array offset on null in /in/1vbDI on line 7 Fatal error: Uncaught Error: Method name must be a string in /in/1vbDI:7 Stack trace: #0 /in/1vbDI(16): Foo->bar('bla') #1 {main} thrown in /in/1vbDI on line 7
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18
Warning: Undefined variable $arr in /in/1vbDI on line 7 Warning: Trying to access array offset on value of type null in /in/1vbDI on line 7 Fatal error: Uncaught Error: Method name must be a string in /in/1vbDI:7 Stack trace: #0 /in/1vbDI(16): Foo->bar('bla') #1 {main} thrown in /in/1vbDI on line 7
Process exited with code 255.
Output for 7.4.0 - 7.4.33
Notice: Undefined variable: arr in /in/1vbDI on line 7 Notice: Trying to access array offset on value of type null in /in/1vbDI on line 7 Fatal error: Uncaught Error: Function name must be a string in /in/1vbDI:7 Stack trace: #0 /in/1vbDI(16): Foo->bar('bla') #1 {main} thrown in /in/1vbDI on line 7
Process exited with code 255.
Output for 7.3.32 - 7.3.33
Fatal error: Uncaught Error: Function name must be a string in /in/1vbDI:7 Stack trace: #0 /in/1vbDI(16): Foo->bar('bla') #1 {main} thrown in /in/1vbDI on line 7
Process exited with code 255.
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31
Notice: Undefined variable: arr in /in/1vbDI on line 7 Fatal error: Uncaught Error: Function name must be a string in /in/1vbDI:7 Stack trace: #0 /in/1vbDI(16): Foo->bar('bla') #1 {main} thrown in /in/1vbDI on line 7
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Notice: Undefined variable: arr in /in/1vbDI on line 7 Fatal error: Function name must be a string in /in/1vbDI on line 7
Process exited with code 255.

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