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<?php function assignIfSet($testable, &$assigned) { if(isset($testable)) { $assigned = $testable; return true; } $assigned = null; return false; } $arr = [ 'foo' => (object)[ 'bar' => (object)[ 'zigi' => 1 ] ] ]; if(assignIfSet($arr['foo']->bar->zigi, 'Hello World')) { echo 'Success'; } else { echo 'Failure'; }
Output for 8.3.0 - 8.3.6
Fatal error: Uncaught Error: assignIfSet(): Argument #2 ($assigned) could not be passed by reference in /in/805Zj:20 Stack trace: #0 {main} thrown in /in/805Zj on line 20
Process exited with code 255.
Output for 8.1.23 - 8.1.28, 8.2.10 - 8.2.18
Fatal error: Uncaught Error: assignIfSet(): Argument #2 ($assigned) cannot be passed by reference in /in/805Zj:20 Stack trace: #0 {main} thrown in /in/805Zj on line 20
Process exited with code 255.
Output for 5.4.0 - 5.4.39
Fatal error: Only variables can be passed by reference in /in/805Zj on line 20
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/805Zj on line 13
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, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/805Zj on line 13
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/805Zj on line 13
Process exited with code 255.
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