Create dynamic Array in PHP

Here are the instructions to create dynamic array using php.

Dynamic Array is one where the elements can be altered during run time.

This title explain you both single dimensional and multidimensional array.

First let we declare the variables,

//Single Dimensional
$single_arr=array();
//Multidimensional
$multi_arr=array();

We can able to create dynamic new array from the database tables or existing arrays.

Now we create the dynamic array from tables

TableName: test

 
sno
dept
name
1
P&AR
D.Premkumar
2
H,P&E
N.Thangamani
3
Agriculture
K.Shanmugam
4
RD&PR
P.Usha
5
H&FW
M.Vijayarani
6
Public
R.Kalaimani
7
Public
E.Dhandapani
8
P&AR
A.Anbarasan
9
H&FW
B.Kamakshi
10
Sch.Edn.
M.Vijayalakshmi
11
Agriculture
M.R.Amamath
12
L&E
K.Lakshmi
13
Revenue
S.Karikalan
14
Home
S.Sellakkannu
15
Agriculture
G.Ramanuja Surendranath

$sql="SELECT sno,dept,name FROM test";
$query=@mysql_query($sql);
$num_query=@mysql_num_rows($query);
if($num_query>0)	{
while($fetch=mysql_fetch_assoc($query))	{
//Single Dimension Array
$single_arr[$fetch['sno']]=$fetch['name'];
//Multiple Dimension Array
$multi_arr[$fetch['dept']][$fetch['sno']]=$fetch['name'];
}
}
//echo ' < pre > ';
//print_r( $single_arr );
//print_r( $multi_arr );

Below are the output for created dynamic single dimensional array

Array
(
    [1] => D.Premkumar
    [2] => N.Thangamani
    [3] => K.Shanmugam
    [4] => P.Usha
    [5] => M.Vijayarani
    [6] => R.Kalaimani
    [7] => E.Dhandapani
    [8] => A.Anbarasan
    [9] => B.Kamakshi
    [10] => M.Vijay
    [11] => M.R.Amamath
    [12] => K.Lakshmi
    [13] => S.Karikalan
    [14] => S.Sellakkannu
    [15] => G.Ramanuja
)

Below are the output for created dynamic multidimensional array

Array
(
    [P&AR] => Array        (
            [1] => D.Premkumar
            [8] => A.Anbarasan
        )
    [H,P&E] => Array        (
            [2] => N.Thangamani
        )
    [Agriculture] => Array        (
            [3] => K.Shanmugam
            [11] => M.R.Amamath
            [15] => G.Ramanuja
        )
    [RD&PR] => Array        (
            [4] => P.Usha
        )
    [H&FW] => Array        (
            [5] => M.Vijayarani
            [9] => B.Kamakshi
        )
    [Public] => Array        (
            [6] => R.Kalaimani
            [7] => E.Dhandapani
        )
    [Sch.Edn.] => Array        (
            [10] => M.Vijay
        )
    [L&E] => Array        (
            [12] => K.Lakshmi
        )
    [Revenue] => Array        (
            [13] => S.Karikalan
        )
    [Home] => Array        (
            [14] => S.Sellakkannu
        )
)

From above we concluded that we created dynamic php array.