PHP array_merge() Function

Complete PHP Array Reference

Definition and Usage

The array_merge() function merges one ore more arrays into one array.

Syntax

array_merge(array1,array2,array3...)

Tips and Notes

Tip: You can assign one array to the function, or as many as you like.

Note: If two or more array elements have the same key, the last one overrides the others.

Note: If you assign only one array to the array_merge() function, and the keys are integers, the function returns a new array with integer keys starting at 0 and increases by 1 for each value. (See example 2)

Example 1

<?php
$a1=array("a"=>"Horse","b"=>"Dog");
$a2=array("c"=>"Cow","b"=>"Cat");
print_r(array_merge($a1,$a2));
?>

The output of the code above will be:

Array ( [a] => Horse [b] => Cat [c] => Cow )

Example 2

Using only one array parameter.

<?php
$a=array(3=>"Horse",4=>"Dog");
print_r(array_merge($a));
?>

The output of the code above will be:

Array ( [0] => Horse [1] => Dog )

Complete PHP Array Reference

What do you want your Web site to do?

Ektron’s new Extranet for Client Collaboration is designed to manage documents and timelines while facilitating collaboration among your internal and external project stake holders.

		Client authentication using Ektron's robust membership module, allowing you to add, manage and notify your project stake holders
		Project Status Dashboard allowing for visual navigation across all aspects of your project, efficiently and effectively from one single location
		Wiki Scribble Pad for tracking major additions, changes or other related announcements for your project teams
		Discussion forums and message boards to facilitate conversations within a non real-time environment
		Integrated Document Management allowing you to maintain a complete history and audit trail of all documents that can affect the success of your project
		Milestone Tracking with Outlook synchronization ensuring all your goals and deadlines are met
		Public and Private Blogs for further extending communication across the team regarding status, feature creep or other external changes

See why there are 20,000+ Ektron integrations worldwide.

Click here to learn more, then request a live online demo or download a FREE TRIAL

Get Your Diploma! W3Schools' Online Certification Program is the perfect solution for busy professionals who need to balance work, family, and career building. The HTML Certificate is for developers who want to document their knowledge of HTML, XHTML, and CSS. The ASP Certificate is for developers who want to document their knowledge of ASP, SQL, and ADO.

Jump to: Top of Page or HOME or Printer friendly page

W3Schools provides material for training only. We do not warrant the correctness of its contents. The risk from using it lies entirely with the user. While using this site, you agree to have read and accepted our terms of use and privacy policy.

Copyright 1999-2007 by Refsnes Data. All Rights Reserved.

W3Schools was converted to XHTML in December 1999