Loop through multiple arrays with PHP

Question

I have several arrays: $n, $p, $a

Each array is the same:

$n = array()
$n['minutes'] = a;
$n['dollars'] = b;
$n['units'] = c;

$p = array()
$p['minutes'] = x;
$p['dollars'] = y;
$p['units'] = z;

etc...

I also have a simple array like this:

$status = array('n', 'p', 'a');

Is it possible for me to use the $status array to loop through the other arrays?

Something like:

foreach($status as $key => $value) {
    //display the amounts amount here
};

So I would end up with:

a
x

b
y

c
z

Or, do I need to somehow merge all the arrays into one?

My $status array can be whatever - I was trying to use it to be able to loop through the other arrays so whatever works... — Jason
– Jason, Commented Dec 28, 2011 at 13:30
What correlation is there betweeh the $status array and $n/$p... I can't see any logical connection — Mark Baker
– Mark Baker, Commented Dec 28, 2011 at 13:31
The value in the status array (p) relates to the name of the other array ($p) so it is the name of the array, not the name of the array item. — Jason
– Jason, Commented Dec 28, 2011 at 13:36

Darm · Accepted Answer · 2011-12-28 13:36:57Z

2

Use:

$arrayData=array('minutes','dollars','units');
foreach($arrayData as $data) {
    foreach($status as $value) {
       var_dump(${$value}[$data]);
    }
}

answered Dec 28, 2011 at 13:36

Darm

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Mark Baker · Accepted Answer · 2011-12-28 13:47:08Z

2

foreach($n as $key => $value) {
    foreach($status as $arrayVarName) (
        echo $$arrayVarName[$key],PHP_EOL;
    }
    echo PHP_EOL;
}

Will work as long as all the arrays defined in $status exist, and you have matching keys in $n, $p and $a

Updated to allow for $status

edited Dec 28, 2011 at 13:47

answered Dec 28, 2011 at 13:30

Mark Baker

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Comments

Paul · Accepted Answer · 2011-12-28 13:36:21Z

0

You could use next() in a while loop.

Example: http://ideone.com/NTIuJ

EDIT:

Unlike other answers this method works whether the keys match or not, even is the arrays are lists, not dictionaries.

edited Dec 28, 2011 at 13:36

answered Dec 28, 2011 at 13:30

Paul

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Comments

Envyrus · Accepted Answer · 2011-12-28 13:47:31Z

0

If I understand your goal correctly, I'd start by putting each array p/n/... in an array:

$status = array();

$status['n'] = array();
$status['n']['minutes'] = a;
$status['n']['dollars'] = b;
$status['n']['units'] = c;


$status['p'] = array();
$status['p']['minutes'] = a;
$status['p']['dollars'] = b;
$status['p']['units'] = c;

Then you can read each array with:

foreach($status as $name => $values){
    echo 'Array '.$name.': <br />';
    echo 'Minutes: '.$values['minutes'].'<br />'; 
    echo 'Dollars: '.$values['dollars'].'<br />';
    echo 'Units: '.$values['units'].'<br />';
}

For more information, try googling Multidimensional Arrays.

answered Dec 28, 2011 at 13:47

Envyrus

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