[SOLVED] Combining multidimensional arrays

[Schlo_50]

Hello,

 

I have 2 arrays; $carList which contains 3 cars and their attributes, and $playerSelected which contains details of 1 car belonging to a human player.

 

Arrays:

<?php

$carList = array( 
    array( 
        'manufacturer' => 'Mitsubishi', 
        'model' => 'Colt', 
        'modexp' => '1200',
        'traction' => '500',
        'aerodynamics' => '3000',
        'acceleration' => '1500',
        'styling' => '6000' 
    ), 
    array( 
        'manufacturer' => 'Mitsubishi', 
        'model' => 'Evolution', 
        'modexp' => '45000',
        'traction' => '500',
        'aerodynamics' => '3000',
        'acceleration' => '1500',
        'styling' => '6000'
    ), 
    array( 
        'manufacturer' => 'Toyota', 
        'model' => 'MR2', 
        'modexp' => '25000',
        'traction' => '500',
        'aerodynamics' => '3000',
        'acceleration' => '1500',
        'styling' => '6000'
    )
);

$playerSelected = array( 
        'manufacturer' => 'Toyota', 
        'model' => 'Celica', 
        'modexp' => '1200000',
        'traction' => '500000',
        'aerodynamics' => '3000000',
        'acceleration' => '1500000',
        'styling' => '6000000' 
);

/>

 

In my code there is a function to randomly pick 2 cars from the $carList array. What I want to do is after the random pair of cars are generated, combine my $playerSelected array into that. I've tried array_push and array_merge but can't quite get it right.

 

Function:

<?php

function getRandomSubset($carList, $n) 
{ 
    /* 
     * If $n isn't greater than the number of entries, 
     * reset it to be the number of entries available. 
     */ 
    $n = (count($carList)<$n) ? count($carList) : $n; 
  
    $randList = array();

    // Pull the desired number of entry keys at random 
    $keys = array_rand($carList, $n);

    // Loop through the keys 
    foreach($keys as $key) { 

        // Add the value to end of the return array 
        array_push($randList, $carList[$key]); 

    } 

       //My not so great attempt on the next line..
array_push($randList, $playerSelected);

    return $randList; 

}

echo '<pre>';
//This just displays the two randomly generated cars
$randomSet = getRandomSubset($carList, 2);
echo '</pre>'; 

/>

 

Is there anyone who can help me please?

If you need more info just say!

 

Thanks

[Schlo_50]

Apologies in advance for not closing my PHP tags properly. No idea why I did that..

[GingerRobot]

What do you mean by 'combine'? Do you with your player array to contain two cars afterwards? If so, you need to make your player array a two dimensional one. I.e:

 

$playerSelected = array();
$playerSelected[] = array( 
        'manufacturer' => 'Toyota', 
        'model' => 'Celica', 
        'modexp' => '1200000',
        'traction' => '500000',
        'aerodynamics' => '3000000',
        'acceleration' => '1500000',
        'styling' => '6000000' 
);

 

 

You can then add a new car in the same vain as above;

 

$playerSelected[] = $carList[$key];

 

[Andy-H]

What you currently have should work if you pass the array stored in $playerSelected to the function. In your current code $playerSelected isn't available to the function as a function has it's own scope.

[Schlo_50]

Well, my function will output 2 random cars from the initial 3 like this:

 

Array
(
    [0] => Array
        (
            [manufacturer] => Toyota
            [model] => Aygo
            [modexp] => 950
            [traction] => 500
            [aerodynamics] => 3000
            [acceleration] => 1500
            [styling] => 6000
        )

    [1] => Array
        (
            [manufacturer] => Nissan
            [model] => 350Z
            [modexp] => 30000
            [traction] => 500
            [aerodynamics] => 3000
            [acceleration] => 1500
            [styling] => 6000
        )

)

 

I want to add my players car to the array above to end up with this:

 

Array
(
    [0] => Array
        (
            [manufacturer] => Toyota
            [model] => Aygo
            [modexp] => 950
            [traction] => 500
            [aerodynamics] => 3000
            [acceleration] => 1500
            [styling] => 6000
        )

    [1] => Array
        (
            [manufacturer] => Nissan
            [model] => 350Z
            [modexp] => 30000
            [traction] => 500
            [aerodynamics] => 3000
            [acceleration] => 1500
            [styling] => 6000
        )

    [2] => Array
        (
            [manufacturer] => Toyota
            [model] => Celica
            [modexp] => 1200000
            [traction] => 5000000
            [aerodynamics] => 3000000
            [acceleration] => 15000000
            [styling] => 6000000
        )


)

[Andy-H]

<?php

function getRandomSubset($carList, $playerSelected, $n) 
{ 
    /* 
     * If $n is greater than the number of values in the array, 
     * reset it to be the number of entries available. 
     */ 
    $i = count($carList) - 1;
    $n = ($i < $n) ? $i : $n; 
  
    $randList = array();

    // Pull the desired number of entry keys at random 
    $keys = array_rand($carList, $n);

    // Loop through the keys 
    foreach($keys as $key) { 

        // Add the value to end of the return array 
        array_push($randList, $carList[$key]); 

    } 

   //Push the $playerSelected array on to the generated array
   array_push($randList, $playerSelected);

    return $randList; 

}
// Set arrays of cars
$carList = array( 
    array( 
        'manufacturer' => 'Mitsubishi', 
        'model' => 'Colt', 
        'modexp' => '1200',
        'traction' => '500',
        'aerodynamics' => '3000',
        'acceleration' => '1500',
        'styling' => '6000' 
    ), 
    array( 
        'manufacturer' => 'Mitsubishi', 
        'model' => 'Evolution', 
        'modexp' => '45000',
        'traction' => '500',
        'aerodynamics' => '3000',
        'acceleration' => '1500',
        'styling' => '6000'
    ), 
    array( 
        'manufacturer' => 'Toyota', 
        'model' => 'MR2', 
        'modexp' => '25000',
        'traction' => '500',
        'aerodynamics' => '3000',
        'acceleration' => '1500',
        'styling' => '6000'
    )
);

$playerSelected = array( 
        'manufacturer' => 'Toyota', 
        'model' => 'Celica', 
        'modexp' => '1200000',
        'traction' => '500000',
        'aerodynamics' => '3000000',
        'acceleration' => '1500000',
        'styling' => '6000000' 
);

// Generate car array
$randomSet = getRandomSubset($carList, $playerSelected, 2);

echo '<pre>';
/*
   This just displays the two randomly generated cars
   And the selected players car...
*/
print_r($randomSet);
echo '</pre>'; 

?>

[Schlo_50]

All makes sense now!

 

Thanks for both you guys help.