How to remove the last two array elements in php

Two removal methods: 1. Use the array_splice() function, just set the second parameter of the function to "-2", the syntax is "array_splice($arr,-2)" , will change the original array. 2. To use the array_slice() function, just set the second parameter of the function to 0 and the third parameter to "-2", the syntax is "array_slice($arr,0,-2)".

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

php remove the last Two methods for two array elements

Method 1. Use the array_splice() function to remove the last two array elements

array_splice() When the function deletes some elements of the array, it will form these deleted elements into a new array, and then return the new array; therefore, the array_splice() function can be used to intercept array fragments.

array_splice(array1,start,length,array2)

#This function will change the original array and return the array containing the extracted elements.

Just set the second parameter start of the function to -2 to remove the last two array elements

<?php
header("Content-type:text/html;charset=utf-8");
$arr = array(1,2,3,4,5,6,7,8,9,10);
echo "原数组：";
var_dump($arr); 

echo "移除最后两个数组元素后：";
$result = array_splice($arr,-2); //截取数组后2位的元素
var_dump($arr);
echo "被删除的数组元素：";
var_dump($result);
?>

Output result

Method 2. Use the array_slice() function to remove the last two array elements

The array_slice() function is a function provided by PHP to intercept the array. It can be Extract a fragment from it. The syntax is as follows:

array array_slice ( array $arr , int $start [, int $length = NULL [, bool $preserve_keys = false ]] )

Parameter description:

• arr represents the array to be intercepted.
• start indicates the starting position (subscript) of interception:
  • If start is a positive number, interception will be performed from front to back.
  • If start is a negative number, start from the position -start from the end of arr and intercept from back to front. For example -2 means start from the second to last element of the array.
• length is an optional parameter, indicating the intercepted length:
  • If length is a positive number, it indicates the number of intercepted elements;
  • If length If it is a negative number, then the intercepted fragment will end at the length position from the end of the array;
  • If it is omitted, it will start from the start position and continue to the end of the array.
• preserve_keys is an optional parameter that specifies whether to retain the original key name. The default is false, that is, not retained; if set to true, the original key name will be retained.

Return value: Returns the selected part in the array.

Just set the second parameter to 0 and the third parameter to -2.

<?php
header("Content-type:text/html;charset=utf-8");
$arr = array(1,2,3,4,5,6,7,8,9,10);
echo "原数组：";
var_dump($arr); 

echo "移除最后两个数组元素后：";
$result = array_slice($arr,0,-2); 
var_dump($result);
?>

Output results

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