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<?php class ExpClass { public $index; public function __construct() { $this->index = 'super'; } public function addNode() { $index &= $this->index; $index .= 'toto'; echo $index; echo '<hr>'; echo $this->index; } } $test = new ExpClass(); $test->addNode();
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $index in /in/oDFi2 on line 15 Fatal error: Uncaught TypeError: Unsupported operand types: null & string in /in/oDFi2:15 Stack trace: #0 /in/oDFi2(27): ExpClass->addNode() #1 {main} thrown in /in/oDFi2 on line 15
Process exited with code 255.

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