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

Two removal methods: 1. Call the unset() function twice to delete two elements respectively, the syntax is "unset(array name [subscript/key name])"; 2. Use the array_splice() function Delete two elements from the specified position in the array, the syntax is "array_splice($arr, starting position, 2)".

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

php removes the array two Two methods for a value

Method 1: Call the unset() function twice to delete two elements

The unset() function can Delete a specified element

Syntax:

unset(数组名[下标]); //删除索引数组中的一个元素
unset(数组名["键名"]); //关联数组中的一个元素

Example 1:

<?php
$arr=array(1,2,3,4,5,6);
var_dump($arr);
unset($arr[2]);
unset($arr[3]);
var_dump($arr);
?>

Example 2:

<?php
$arr=array("a"=>"red","b"=>"green","c"=>"blue","d"=>"blue");
var_dump($arr);
unset($arr["b"]);
unset($arr["d"]);
var_dump($arr);
?>

Method 2: Use the array_splice() function

When the array_splice() function deletes some elements of the array, it will form these deleted elements into a new one. array.

Example 1: Delete 2 elements from the array from the beginning

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$arr = array(10,12,20,25,24,11,22,34,55);
echo "原数组：";
var_dump($arr); 

echo "从开头删除数组2个元素：";
array_splice($arr,0,2); //删除数组2个元素
var_dump($arr);
?>

Example 2: Delete 2 elements from the array after the 1st element

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$arr = array(10,12,20,25,24,11,22,34,55);
echo "原数组：";
var_dump($arr); 

echo "从第1个元素后删除数组2个元素：";
array_splice($arr,1,2); //删除数组2个元素
var_dump($arr);
?>

Example 3: Delete 2 elements from the array after the 2nd element

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$arr = array(10,12,20,25,24,11,22,34,55);
echo "原数组：";
var_dump($arr); 

echo "从第2个元素后删除数组2个元素：";
array_splice($arr,2,2); //删除数组2个元素
var_dump($arr);
?>

Recommended learning:《PHP video tutorial》

The above is the detailed content of How to remove two values ​​from an array in php. For more information, please follow other related articles on the PHP Chinese website!