1--TEST-- 2Unpacking named parameters 3--FILE-- 4<?php 5 6function test($a, $b, $c) { 7 echo "a = $a, b = $b, c = $c\n"; 8} 9 10function test2($a = null, &$b = null) { 11 $b++; 12} 13 14test(...['a' => 'a', 'b' => 'b', 'c' => 'c']); 15test(...['c' => 'c', 'b' => 'b', 'a' => 'a']); 16test(...['a', 'b' => 'b', 'c' => 'c']); 17 18try { 19 test(...['a', 'b' => 'b', 'c']); 20} catch (Error $e) { 21 echo $e->getMessage(), "\n"; 22} 23 24try { 25 test(...['a', 'a' => 'a']); 26} catch (Error $e) { 27 echo $e->getMessage(), "\n"; 28} 29 30$ary = ['b' => 0]; 31$ary2 = $ary; 32test2(...$ary); 33var_dump($ary, $ary2); 34 35test(...new ArrayIterator(['a' => 'a', 'b' => 'b', 'c' => 'c'])); 36test(...new ArrayIterator(['c' => 'c', 'b' => 'b', 'a' => 'a'])); 37test(...new ArrayIterator(['a', 'b' => 'b', 'c' => 'c'])); 38 39try { 40 test(...new ArrayIterator(['a', 'b' => 'b', 'c'])); 41} catch (Error $e) { 42 echo $e->getMessage(), "\n"; 43} 44 45try { 46 test(...new ArrayIterator(['a', 'a' => 'a'])); 47} catch (Error $e) { 48 echo $e->getMessage(), "\n"; 49} 50 51$ary = ['b' => 0]; 52$ary2 = $ary; 53test2(...new ArrayIterator($ary)); 54var_dump($ary, $ary2); 55 56?> 57--EXPECTF-- 58a = a, b = b, c = c 59a = a, b = b, c = c 60a = a, b = b, c = c 61Cannot use positional argument after named argument during unpacking 62Named parameter $a overwrites previous argument 63array(1) { 64 ["b"]=> 65 int(1) 66} 67array(1) { 68 ["b"]=> 69 int(0) 70} 71a = a, b = b, c = c 72a = a, b = b, c = c 73a = a, b = b, c = c 74Cannot use positional argument after named argument during unpacking 75Named parameter $a overwrites previous argument 76 77Warning: Cannot pass by-reference argument 2 of test2() by unpacking a Traversable, passing by-value instead in %s on line %d 78array(1) { 79 ["b"]=> 80 int(0) 81} 82array(1) { 83 ["b"]=> 84 int(0) 85} 86
