1--TEST-- 2Basic arrow function functionality check 3--FILE-- 4<?php 5 6$foo = fn() => 1; 7var_dump($foo()); 8 9$foo = fn($x) => $x; 10var_dump($foo(2)); 11 12$foo = fn($x, $y) => $x + $y; 13var_dump($foo(1, 2)); 14 15// Closing over $var 16$var = 4; 17$foo = fn() => $var; 18var_dump($foo()); 19 20// Not closing over $var, it's a parameter 21$foo = fn($var) => $var; 22var_dump($foo(5)); 23 24// Close over $var by-value, not by-reference 25$var = 5; 26$foo = fn() => ++$var; 27var_dump($foo()); 28var_dump($var); 29 30// Nested arrow functions closing over variable 31$var = 6; 32var_dump((fn() => fn() => $var)()()); 33var_dump((fn() => function() use($var) { return $var; })()()); 34 35?> 36--EXPECT-- 37int(1) 38int(2) 39int(3) 40int(4) 41int(5) 42int(6) 43int(5) 44int(6) 45int(6) 46
