array_diff() 在比较两个平面关联数组中的值时不考虑键

Question

array_diff()

函数未显示正确的结果：

第一个数组：-

Array(
    [designation_id] => 1
    [name] => Y
    [fathers_name] => Z
    [mothers_name] => F
    [spouse_name] => d
    [gender] => F
    [last_achieved_degree] => 2
    [date_of_birth] => 1960-10-17
    [date_of_joining] => 1987-02-04
)

第二个数组：

Array(
    [designation_id] => 9
    [name] => M
    [fathers_name] => N
    [mothers_name] => O
    [spouse_name] => 
    [gender] => M
    [last_achieved_degree] => 1
    [date_of_birth] => 1967-11-17
    [date_of_joining] => 2016-01-01
)

输出：

Array
(
    [name] => Y
    [fathers_name] => Z
    [mothers_name] => F
    [spouse_name] => d
    [gender] => F
    [last_achieved_degree] => 2
    [date_of_birth] => 1960-10-17
    [date_of_joining] => 1987-02-04
)

designation_id

列未显示在输出结果中。 如果

designation_id

值为 1，则该索引不会显示在输出中，否则会显示。是bug还是别的什么？

Answer 1

由于你的数组是关联数组，所以你需要使用

array_diff_assoc

:-

<?php

 $a =   Array(
    'designation_id' =>1,
    'name' => 'Y',
    'fathers_name' => 'Z',
    'mothers_name' => 'F',
    'spouse_name' => 'd',
    'gender' => 'F',
    'last_achieved_degree' => 2,
    'date_of_birth' => '1960-10-17',
    'date_of_joining' => '1987-02-04'
);

$b =Array
(
    'designation_id' => 9,
    'name' => 'M',
    'fathers_name' => 'N',
    'mothers_name' => 'O',
    'spouse_name' => '',
    'gender' => 'M',
    'last_achieved_degree' => 1,
    'date_of_birth' => '1967-11-17',
    'date_of_joining' => '2016-01-01',
);

echo "<pre/>";print_r(array_diff_assoc($a,$b));

输出：- https://3v4l.org/NKbuX

查看更多描述和示例：- https://www.php.net/manual/en/function.array-diff-assoc.php

为什么

array_diff()

不起作用：- https://stackoverflow.com/a/4742438/4248328

Answer 2

array_diff

计算差异而不比较密钥。在第二个数组中，您有

[last_achieved_degree] => 1

，它删除了

[designation_id] => 1

。
尝试一下

array_diff_assoc

。