(PHP 5 >= 5.1.0, PHP 7)
array_diff_key — 使锟矫硷拷锟斤拷锟饺较硷拷锟斤拷锟斤拷锟斤拷牟罴�
$array1
, array $array2
[, array $...
] ) : array
锟斤拷锟斤拷 array1 锟叫的硷拷锟斤拷锟斤拷 array2 锟斤拷锟叫比较ｏ拷锟斤拷锟截诧拷同锟斤拷锟斤拷锟斤拷锟筋。
锟斤拷锟斤拷锟斤拷锟斤拷
array_diff() 锟斤拷同只锟斤拷锟剿比斤拷锟角革拷锟捷硷拷锟斤拷锟斤拷锟斤拷锟斤拷值锟斤拷锟斤拷锟叫的★拷
array1锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫比斤拷
array2锟斤拷源锟斤拷锟斤拷锟斤拷锟叫比斤拷
...锟斤拷锟斤拷冉锟斤拷锟斤拷锟�
array_diff_key() 锟斤拷锟斤拷一锟斤拷锟斤拷锟介，锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷谐锟斤拷锟斤拷锟�
array1
锟叫碉拷锟斤拷未锟斤拷锟斤拷锟斤拷锟轿猴拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟叫的硷拷锟斤拷锟斤拷值锟斤拷
Example #1 array_diff_key() 锟斤拷
锟斤拷 key => value 锟斤拷锟叫碉拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷 (string) $key1 === (string) $key2 时锟斤拷锟斤拷为锟斤拷取锟斤拷锟斤拷浠八碉拷锟街达拷械锟斤拷锟斤拷细锟斤拷锟斤拷图锟介，锟斤拷锟斤拷址锟斤拷锟斤拷谋锟斤拷锟斤拷锟斤拷锟饺伙拷锟斤拷锟�
<?php
$array1 = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4);
$array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan' => 8);
var_dump(array_diff_key($array1, $array2));
?>
锟斤拷锟斤拷锟斤拷锟教伙拷锟斤拷锟斤拷锟�
array(2) {
["red"]=>
int(2)
["purple"]=>
int(4)
}
Note:
注锟解本锟斤拷锟斤拷只锟斤拷锟斤拷硕锟轿拷锟斤拷锟斤拷械锟揭晃拷锟斤拷锟饺伙拷锟斤拷锟斤拷锟斤拷锟� array_diff_key($array1[0], $array2[0]); 锟斤拷锟斤拷锟斤拷锟斤拷锟轿拷取锟�