how to work with multidimensional array in php

If you are programmer then you dont need introduction of array. In every language array is the most important part.

how to work with multidimensional array in php

Using array we can achieve so many things and array is useful for so many times when we do programming.
In this article I am going to share some method about PHP array.

What is PHP array?
An array in PHP is actually an ordered map. A map is a type that associates values to keys. This type is optimized for several different uses; it can be treated as an array, list (vector), hash table (an implementation of a map), dictionary, collection, stack, queue, and probably more. As array values can be other arrays, trees and multidimensional arrays are also possible.

Following is syntax
array(key => value)

Creating PHP array:

1<?php
2$arr = array("str_arr" => "this is string", 25 => true);
3 
4echo $arr["str_arr"]; // print this is string
5echo $arr[25];&nbsp;&nbsp;&nbsp; // print ture
6?>

How to print direct PHP array.

1<?php
2$arr=array("a"=>"jimi","b"=>"timi","c"=>"limi");
3print_r($arr);
4?>

How to print PHP array preformated

1<?php
2$arr=array("a"=>"jimi","b"=>"timi","c"=>"limi");
3print_r("<pre>".$arr);
4?>

How to create a two-dimensional PHP array

1<?php
2$arr = array (
3 "fruits"&nbsp; => array("a" => "orange", "b" => "banana", "c" => "apple"),
4 "numbers" => array(1, 2, 3, 4, 5, 6),
5 "holes"&nbsp;&nbsp; => array("first", 5 => "second", "third")
6);
7print_r("<pre>".$arr);
8?>

How to create an array from MySql table

01<?
02function cre_array($row) {
03 foreach($row as $key => $value) {
04 global $$key;
05 $$key = $value;
06 }
07}
08 
09//User table has first_name field present.
10 
11$sql = mysql_query("SELECT * FROM 'users'");
12while ($row = mysql_fetch_assoc($sql)) {
13 cre_array($row);
14 echo $first_name.'<br>'; //instead of $row['first_name']
15}
16 
17?>

How to count PHP array count

1$fruits = array("a" => "orange", "b" => "banana", "c" => "apple");
2echo sizeof($fruits);
3echo $arrayLength = count($fruits);

PHP and MySql and Array

01<?php
02$sql = "SELECT key,value FROM table";
03$result = mysql_query($sql);
04while($row = mysql_fetch_row($result)) {
05$myArray[$row[0]] = $row[1];
06}
07 
08while(list($key,$value) = each($myArray)) {
09echo "$key : $value";
10}
11?>

Following image will help you to understand two dimensional array.

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Purab

I am Purab from India, Software development is my profession and teaching is my passion. Programmers blog dedicated to the JAVA, Python, PHP, DevOps and Opensource Frameworks. Purab's Github Repo Youtube Chanel Video Tutorials Connect to on LinkedIn View all posts by Purab

3 thoughts on “how to work with multidimensional array in php”

Thanks for this article on arrays. I have a question about WordPress and arrays. Here’s my situation. I have a custom post type called “property” and a custom field called “prop_state”. The prop_state contains a US state word like “Ohio”, “Illinois”, etc. I want to build an array that looks in the “property” post type and see what states are in the database and then give me a count of each state. For instance “There are 11 properties in Illinois”. Can you point me down the right road? I would appreciate any feedback you can lend.

Purab Kharat says:

December 15, 2014 at 5:25 pm

easiest solution would be creating US states as tags or category and using query_posts or wp_query you are able to get count of property easily. If you want keep US states as a meta fields than. it is also doable. you can pass custom field parameters to wp_query. check this documentation.

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