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<?php $result = 0; $result2 = 10; $one = function() { var_dump($result); }; $two = function() use ($result) { var_dump($result); }; $three = function() use (&$result) { var_dump($result); }; $four = function($result2) use (&$result) { var_dump($result2); }; $result++; $one(); // outputs NULL: $result is not in scope $two(); // outputs int(0): $result was copied $three(); // outputs int(1) $four();
Output for git.master_jit, git.master, rfc.property-hooks
Warning: Undefined variable $result in /in/uBcG8 on line 6 NULL int(0) int(1) Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 0 passed in /in/uBcG8 on line 22 and exactly 1 expected in /in/uBcG8:14 Stack trace: #0 /in/uBcG8(22): {closure}() #1 {main} thrown in /in/uBcG8 on line 14
Process exited with code 255.

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