Question

suppose I have the follwing matrix data:

 2  3  
 4  5 
 6  7
 8  9

How to insert them into a 2d php array, can anybody help me with that, I am new to php 2d array, any help will be greatly appreciated!

Answer 1

Do you actually want a 2D array or do you want your first columns to be the keys?

You can do this:

$key = 2;
$value = 3;
$array[$key] = $value;
echo '<pre>'; print_r( $array ); echo '</pre>';
// outputs  array( [2] => 3 )

Then you can access it like this:

foreach( $array as $key => $value ){
    echo $key.' - '.$value.' <br />';
}
// outputs: 2 - 3

You can also do this:

 $array[] = array( '2', '3' );    
 $array[] = array( '4', '5' );    
 // outputs  
      array( [0] => array( 
                     [0] => 2,
                     [1] => 3 )
             [1] => array( 
                     [0] => 4,
                     [1] => 5 )
           )

Read this and post back with a more specific question if you are not understanding somewhere.
https://www.php.net/manual/en/language.types.array.php

Also, the reason the comments are asking you where you got the data is because you can automate much of this process. If you are pulling it from a database, then the 2D arrays can be made automatically. Otherwise, the process I just did above is very manual. I don’t know think I’ve ever made an array like this in a production environment. They are always in for or foreach loops.