How to remove partial values ​​from an array in php

Two methods: 1. Use "array_splice($arr, position, number)" to delete the specified number of values ​​starting from the specified position. If the number of deletions is not set (the third parameter is omitted), then All values ​​starting at the specified position will be deleted. 2. Use "array_slice($arr, position)" to delete all values ​​before the specified position.

The operating environment of this tutorial: Windows 7 system, PHP version 8.1, DELL G3 computer

php remove the array part Two methods of value

Method 1: Use array_splice() function

array_splice() function can delete the specified number starting from the specified position Elements

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array(10,12,20,25,24,23,45,78,-1);
var_dump($arr);
echo "删除后的数组：" ;
array_splice($arr,2,4);
var_dump($arr);
?>

Method 2: Use the array_slice() function

array_slice() to intercept all elements starting at the specified position, That is, delete all elements before the specified position.

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array(10,12,20,25,24,23,45,78,-1);
var_dump($arr);
echo "删除后的数组：" ;
var_dump(array_slice($arr,2));
var_dump(array_slice($arr,4));
var_dump(array_slice($arr,6));
var_dump(array_slice($arr,8));
?>

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