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How to modify the key value of a subarray in a php array

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coldplay.xixiOriginal
2020-10-05 13:20:283142browse

How to modify the key value of a subarray in a php array: Use the function [array_slice()] to take out a value in the array according to the conditions and return it. The syntax is [array_slice(array,offset,length,preserve)] .

How to modify the key value of a subarray in a php array

How to modify the key value of a sub-array in a php array:

Definition and usage

The array_slice() function removes a segment of value from the array based on conditions and returns it.

Note: If the array has string keys, the returned array will retain the key names.

Syntax

array_slice(array,offset,length,preserve)

Example 1

<?php
$a=array(0=>"Dog",1=>"Cat",2=>"Horse",3=>"Bird");
print_r(array_slice($a,1,2));
?>

Output:

Array
( [0] => Cat [1] => Horse )

The specific implementation is as follows:

Reference examples, complete writing:

$ar = array(
array(1 => &#39;a&#39;, 2 => 50, 3 => 60, 4 => &#39;long&#39;, 5 => &#39;zzz&#39;, 6 => &#39;kkk&#39;, 7 => &#39;ooo&#39;),
array(1 => &#39;b&#39;, 2 => 60, 3 => 70, 4 => &#39;king&#39;, 5 => &#39;lll&#39;, 6 => &#39;ttt&#39;, 7 => &#39;ppp&#39;),
array(1 => &#39;c&#39;, 2 => 70, 3 => 80, 4 => &#39;quit&#39;, 5 => &#39;qqq&#39;, 6 => &#39;xxx&#39;, 7 => &#39;ccc&#39;),
);
$kname = array(&#39;StaffId&#39;, &#39;Wage&#39;, &#39;Name&#39;, &#39;Work&#39;, &#39;Type&#39;);
function foo(&$v, $k, $kname) {
$v = array_combine($kname, array_slice($v, 1, -1));
}
array_walk($ar, &#39;foo&#39;, $kname);
print_r($ar);
Array
(
[0] => Array
(
[StaffId] => 50
[Wage] => 60
[Name] => long
[Work] => zzz
[Type] => kkk
)
[1] => Array
(
[StaffId] => 60
[Wage] => 70
[Name] => king
[Work] => lll
[Type] => ttt
)
[2] => Array
(
[StaffId] => 70
[Wage] => 80
[Name] => quit
[Work] => qqq
[Type] => xxx
)
)

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