Array Functions in PHP: PART 8

Introduction

In this article I describe the PHP array functions array_merge, array_merge_recursive and array_multisort. To learn some other math functions, go to:

1. Array Functions in PHP: PART 1
    
2. Array Functions in PHP: PART 2
    
3. Array Functions in PHP: PART 3
    
4. Array Functions in PHP: PART 4
    
5. Array Functions in PHP: PART 5
    
6. Array Functions in PHP: PART 6
    
7. Array Functions in PHP: PART 7

PHP array_merge function

The PHP array_merge function merges one or more arrays into a single array.

Syntax

array_merge(array1, array2,.......................)

Parameters

The parameters in the array_merge function are:

Parameter	Description
array1	It specifies an array.
array2	It specifies an array.

Example

An example of the array_merge function is:


<?php
$array1 = array(1 => "Apple",  2=> "Mango", 3 => "Orange", "Banana");
$array2 = array(1 => "Apple", 2=>"Raspberry", "banana",4 => "Orange");
echo "<pre>";
$result = array_merge($array1, $array2);
print_r($result);
?>

Output

 

PHP array_merge_recursive function

The PHP array_merge_recursive function merges two or more arrays recursively. The difference between the function array_merge and the function array_merge_recursive is that, when two or more array elements have the same key, instead of overriding the keys, the array_merge_recursive() function converts the value into an array.

Syntax

array_merge_recursive(array1, array2,.......................)

Parameters

The parameters in the array_merge_recursive function are:

Parameter	Description
array1	It specifies an array.
array2	It specifies an array.

Example

An example of the array_merge_recursive function is:


<?php
$array1 = array(1 => "Apple",  2=> "Mango", 3 => "Orange");
$array2 = array(1 => "Apple", 2=>"Raspberry", 3=>"banana");
echo "<pre>";
$result = array_merge_recursive($array1, $array2);
print_r($result);
?>

Output



PHP array_multisort Function

The PHP array_multisort function is used to sort multiple or multidimensional arrays and return true on success and false on failure.

Syntax

array_multisort(array1,sorting order, sorting type,array2, array3,.........................)

Parameters

The parameters in the array_multisort function are:

Parameter	Description
array1	It specifies an array.
sorting order	It specifies the sorting order, and order may be: Sort ASC: It is default order in other words by default sort in ascending order. Sort DESC: Sort in descending order.
sorting type	It specifies the sorting types, and possible values are: SORT_REGULAR It compare elements normally and it is by default. SORT_NUMERIC It compare elements as numeric value. SORT_STRING     It compare elements as string value.
array2	It specifies an array.
array3	It specifies an array.

Example

An example of the array_multisort function is:


<?php
$array1 = array("Mango","Orange","Apple");
$array2 = array("Orange","Raspberry","banana");
echo "<pre>";
array_multisort($array1, $array2);
print_r($array1);
print_r($array2);
?>

Output