How to use 3 dimensional array in PHP

I'm doing some image processing in php and normally I never use array in php before.

I have to keep the value of rgb value of hold image in 3 dimensional array.

For example, rgbArray[][][]

the first [] is represent th weight, the second[] use to keep height and the last one is use to keep either red,greed or blue. How can i create an array in php that can keep th开发者_Go百科is set of value.

Thank you in advance.

I think you're looking for a two dimensional array:

$rgbArray[$index] = array('weight'=>$weight, 'height'=>$height, 'rgb'=>$rgb);

But here is a 3 dimensional array that could make sense for what you're asking.

$rgpArray[$index] = array('red'=>array('weight'=>$weight, 'height'=>$height),
                          'green'=>array('weight'=>$weight, 'height'=>$height),
                          'blue'=>array('weight'=>$weight, 'height'=>$height));

Your example is a little confuse rgbArray[1][1][red], it looks like you want this:

$rgbArray = array(1 => array(1 => array('red' => 'value')));
echo $rgbArray[1][1]['red']; // prints 'value'

I recommend, as PMV said, to do next:

$rgbArray = array('weight' => 1, 'height' => 1, 'rgb' => 'red' );

or

$rgbArray = array();
$rgbArray['weight'] = 1; // int value
$rgbArray['height'] = 1; // int value
$rgbArray['rgb'] = 'red'; // string value

If it's not what you want please be more specific in order to be helped.

If yours array

$rgbArray = array('red'=>array('weight'=>$weight, 'height'=>$height),
                  'green'=>array('weight'=>$weight, 'height'=>$height),
                  'blue'=>array('weight'=>$weight, 'height'=>$height));

Then you can assign the value to rgbArray like

$weight = $rgbArray['red']['weight']
$height = $rgbArray['red']['height']

If yours array

$rgbArray = array('red'=>array($weight, $height),
                  'green'=>array($weight, $height),
                  'blue'=>array($weight, $height));

Then you can assign the value to rgbArray like

$weight = $rgbArray['red'][0]
$height = $rgbArray['red'][1]

Define three-dimensional array

$threeDimArray = array(array(
                        array("reza", "daud", "ome"),
                        array("shuvam", "himel", "izaz"),
                        array("sayanta", "hasib", "toaha")));

Printing three-dimensional array

for ($i=0; $i < count($threeDimArray); $i++) { 
    for ($j=0; $j < count($threeDimArray[$i]); $j++) { 
        for ($k=0; $k < count($threeDimArray[$i][$j]); $k++) { 
            echo $threeDimArray[$i][$j][$k];
            echo " ";
        }
        echo "<br>";
    }
}