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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: $var\n"; } } (new Foo)->bar("bla");
based on odSrZ
Output for 7.0.0 - 7.2.0
Notice: Undefined variable: arr in /in/1vbDI on line 7 Fatal error: Uncaught Error: Function name must be a string in /in/1vbDI:7 Stack trace: #0 /in/1vbDI(16): Foo->bar('bla') #1 {main} thrown in /in/1vbDI on line 7
Process exited with code 255.
Output for 5.4.12 - 5.6.28
Notice: Undefined variable: arr in /in/1vbDI on line 7 Fatal error: Function name must be a string in /in/1vbDI on line 7
Process exited with code 255.
Output for 5.3.22 - 5.3.29
Parse error: syntax error, unexpected '{', expecting T_STRING or T_VARIABLE or '$' in /in/1vbDI on line 7
Process exited with code 255.