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)

Parameters	Description
array1	Required . Specifies an array.
start	Required. numerical value. Specifies the starting position of deleted elements. 0 = first element. If the value is set to a positive number, removal begins at the offset specified by the value in the array. If the value is set to a negative number, removal begins at the offset specified by the value from the end of the array. -2 means start from the second to last element of the array.
length	Optional. numerical value. Specifies the number of elements to be removed, which is also the length of the returned array. If this value is set to a positive number, remove this number of elements. If this value is set to a negative number, all elements from start to length inverse of the end of the array are removed. If this value is not set, all elements from the position set by the start parameter to the end of the array are removed.
array2	Optional. Specifies the array with the elements to be inserted into the original array. If there is only one element, it can be set to a string and does not need to be set to an array.

#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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