[PHP5] Declaring 2D arrays

[Drezard]

Whats the fastest way to set a 2D array? I've found multiple different ways but, I cant find one thats fast. What is the fastest way (or way you prefer?)

 

Thanks, Daniel

[discomatt]

You do not have to declare arrays in PHP... but assigning them, there are several ways

 

$arr[] = 'test1';

$arr[] = 'test2';

 

will populate $arr as such:

 

$arr[0] contains 'test1';

$arr[1] contains 'test2';

 

You can also use the array() function

 

$arr = array('test1', 'test2');

 

will populate $arr as such:

 

$arr[0] contains 'test1';

$arr[1] contains 'test2';

 

Alternately, you can define them with user keys with the array function

 

$arr = array('keyA' => 'test1', 'keyB' => 'test2');

 

will populate $arr as such:

 

$arr['keyA'] contains 'test1';

$arr['keyB'] contains 'test2';

 

You can also define them directly, as so

 

$arr['keyA'] = 'test1';

$arr[1] = 'test2';

 

To iterate through an array, the easiest way is to use the foreach() function, as described here

http://php.net/foreach

[keeB]

He's asking for 2 dimensional (2D) arrays.

 

Basically, you don't instantiate them

 

All kidding aside, my preferred method is the following:

 

<?php

$d2 = array("dimension2" => "this is dimension2");
$d1 = array("dimension1" => $d1);

?>