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How to remove an element from the middle of an array in php

青灯夜游
青灯夜游Original
2022-05-16 20:31:482318browse

Removal method: 1. Use the "$index=floor(count($arr1)/2);" statement to obtain the index in the middle of the array; 2. Use array_splice() to delete from the obtained index. 1 element, syntax "array_splice($arr1,$index,1);".

How to remove an element from the middle of an array in php

The operating environment of this tutorial: windows7 system, PHP8.1 version, DELL G3 computer

php from the middle of the array Method to remove an element

In PHP, you can use the array_splice() function to remove an element from the middle of an array.

Just use the array_splice() function to delete 1 element starting from the middle position.

Implementation idea:

  • Get the middle position index--use floor() and count()

    • Use count() to get the length of the array and divide it by 2

    • Because it must be considered that in odd cases, the division cannot be completed, so you need to use floor() to round down

  • array_splice() function deletes 1 element starting from the middle index position.

Implementation example:

When the array length is an odd number

<?php
header("Content-type:text/html;charset=utf-8");
$arr1=array(1,2,3,4,5,32,34,12,7);
echo "数组长度为奇数时:";
var_dump($arr1);
$index=floor(count($arr1)/2);
array_splice($arr1,$index,1);
var_dump($arr1);
?>

How to remove an element from the middle of an array in php

When the array length is an even number

<?php
header("Content-type:text/html;charset=utf-8");
$arr2=array(1,2,3,4,5,32,34,12,7,8);

echo "数组长度为偶数时:";
var_dump($arr2);
$index=floor(count($arr2)/2);
array_splice($arr2,$index,1);
var_dump($arr2);
?>

How to remove an element from the middle of an array in php

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