[Resolved] Looping through multi-dimensional array

Mucello

I guess this is sort of a newbie question... I don't know. I'm sort of familiar with 1D arrays but this multi dimensional array stuff is throwing me for a loop, no pun intended, hah.

I have been working on this all afternoon and have gotten nowhere with it... I'm hopeful that someone here can help me straighten this out.

I have an array called $request and it contains other arrays.

The following example is where I'm adding two new things to the array:

$request['param'][] = 'temp';
$request['temp']['desc'] = '2m Temperature';
$request['temp']['unit'] = 'Celcius';

$request['param'][] = 'dew';
$request['dew']['desc'] = 'Dew Point temperature';
$request['dew']['unit'] = 'Celcius';

Now I want to echo ONLY the 'desc' values for each 'param' key. In other words, I want to somehow echo only:
2m Temperature
Dew Point Temperature

And then I'll also want to do the same with ONLY the 'unit' key as well.

Obviously I need some sort of nested while or for loop but for some reason I just can't seem to wrap my mind around the logic for this. Can someone please help?

Regards,
Mark

Mucello

I changed my array slightly to hopefully make it easier to use. Or perhaps I screwed it up... I don't know, that's why I'm here😉

This is what my array looks like now:

Array
(
    [temp] => Array
        (
            [desc] => 2m Temperature
            [unit] => Celcius
        )

[dew] => Array
    (
        [desc] => Dew Point temperature
        [unit] => Celcius
    )

)

So how can I iterate through my array and display ONLY the [desc] or only the [unit] key values without knowing how many keys there are?

jimson

<?php
// i rebuild your array to show u how to do it.
$param = array(
			'temp' => array(
				'desc'	=> '2m Temperature',
				'unit'	=> 'Celcius'),
			'dew' => array(
				'desc'	=> 'Dew Point temperature',
				'unit'	=> 'celcius'),
			'damnbush' => array(
				'desc'	=> 'cheat'),
			'sadam' => array(
				'desc'	=> 'where are you now'),
			'america' => array(
				'desc'	=> "bush\'s country",
				'unit'	=> 'dollar')
		);


foreach($param as $pKey => $pVal) {
	// assume we want to show only array that have item "unit"
	if(isset($param[$pKey]['unit'])){
		echo 'Description = '.$param[$pKey]['desc'].'<br>';
		echo 'Military Unit = '.$param[$pKey]['unit'].'<br><br>';
	}
}
?>

so the result will only show

2m Temperature
Dew Point temperature
bush's country

hopefully u are understood.

may God bless you, me and all of us. 🙂

Mucello

Yes that is very helpful! Thank you very much for your help!!! 🙂