How to use array_slice function in php

Usage of array_slice function in php: [array_slice($array,$start,$length,$preserve)]. The array_slice function is used to remove a segment of values ​​from an array based on conditions and return the selected portion of the array.

array_slice() is a built-in function of PHP. The syntax is array_slice($array,$start,$length,$preserve), which is used to select according to user selection. (Condition) Gets a part of the array and returns it.

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How to use the php array_slice() function?

php The array_slice() function takes out a value from the array based on conditions and returns it.

Basic syntax:

array_slice($array,$start,$length,$preserve)

Parameters: This function can take four parameters

● $array: required, not allowed Omit. Specifies an array.

●　$start: Required and cannot be omitted. Value, specifies the starting position of the element to be taken out, 0 = first element. If the value is set to a positive number, start from front to back; if the value is set to a negative number, start from back to front. -2 means start from the second to last element of the array.

● $length: optional and can be omitted. A numerical value that specifies the length of the returned array. If the value is set to an integer, this number of elements is returned; if the value is set to a negative number, the function will terminate fetching this far from the end of the array; if the value is not set, the function returns starting from the position set by the start parameter. All elements up to the end of the array.

●　$preserve: Optional, can be omitted. Specifies whether the function retains key names or resets key names. Possible values: true - keep key names, false - default (reset key names).

Return value: array_slice() function will return a selected segment of the array. If the array has string keys, the returned array will retain the key names.

Let’s take a look at how to use the php array_slice() function through an example.

Example 1:

<?php
header("content-type:text/html;charset=utf-8"); 
$class=array("西门","灭绝","无忌","peter");
print_r(array_slice($class,0,2));
?>

Output:

Array ( [0] => 西门 [1] => 灭绝 )

Example 2:

<?php
header("content-type:text/html;charset=utf-8"); 
$a=array("灭绝","西门","无忌","欧阳克","韦小宝");
print_r(array_slice($a,1,2,true));
?>

Output:

Array ( [1] => 西门 [2] => 无忌 )

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