How to remove a value from a one-dimensional array in php

Method: 1. Use “array_shift(array)” to delete the first value; 2. Use “array_pop(array)” to delete the last value; 3. Use “unset($array name[subscript]] )" to delete the value of the specified subscript; 4. Use "array_splice(array, position, 1)" to delete the value of the specified position.

The operating environment of this tutorial: windows7 system, PHP version 8.1, DELL G3 computer

php one-dimensional array 4 ways to remove a value

Method 1: Use the array_shift() function

array_shift($arr) The function can delete the first element of the $arr array

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array(10,12,20,25,24);
echo "原数组：";
var_dump($arr);

array_shift($arr);

echo "删除后的数组：" ;
var_dump($arr);
?>

Note: array_shift() will change the original array, the length of the array will be reduced by 1, and all other elements will be Move forward one position.

Method 2: Use the array_pop() function

array_pop($arr)The function can delete the last element of the $arr array

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array(10,12,20,25,24);
echo "原数组：";
var_dump($arr);

array_pop($arr);

echo "删除后的数组：" ;
var_dump($arr);
?>

Note: array_pop() will also change the original array.

Method 3: Use the unset($arr[subscript]) statement

This statement can delete the array element of the specified subscript

• $arr[subscript] You can access the specific elements of the array arr

• ## The unset() function is used to destroy the given variable.

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array(10,12,20,25,24);
echo "原数组：";
var_dump($arr);

unset($arr[3]);

echo "删除后的数组：" ;
var_dump($arr);
?>

Note: This method will also change the original array.

Method 4: Use array_splice() function

array_splice() function can delete an element at the specified position

<?php
header("Content-type:text/html;charset=utf-8");
$arr=array(10,12,20,25,24);
echo "原数组：";
var_dump($arr);

array_splice($arr,2,1);

echo "删除后的数组：" ;
var_dump($arr);
?>

Note: The array_splice() function will also change the original array.

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