Getting an array element dynamically in PHP 5?

Question

I have an array ($configOptions) which contains some arrays. Each array ($option) in that array has this structure:

array
  'manufacturer1_sender' => string 'general' (length=7)
  'manufacturer1_mail' => string '[email protected]' (length=16)
  'manufacturer1_template' => string       
  'orderhandling_options_manufacturer1' (length=58)
  'manufacturer1_name' => string 'Acer' (length=4)

The only thing that changes is the number like in manufacturer1_name. The number can be 2,3,4 and so on. Now I have this code:

foreach($configOptions as $option) {
    $name = ??????????;        
}

The $option is the array which I dumped above, how could I access manufacturerN_name in the foreach?

Thanks!

DaveyBoy · Accepted Answer · 2012-03-30 10:42:35Z

2

There's a few ways:

1 - Retrieve all the keys in the sub-array and check each one against a regular expression, capture the result into an array and then use that as the index:

$keys=array_keys($option); //Retrieve all keys
$name='';
foreach ($keys as $key)    //Loop
{
    if (preg_match('/^(manufacturer\d+_name)$/'),$key))
    {
        $name=$key; // We've got a match!
    }
}

2 - If the manufacturerN_name is always the last element in the array, use

$throwaway=end($option); //Retrieve last item in array
$name=key($option)       //Get index of current position

or some similar construct

answered Mar 30, 2012 at 10:42

DaveyBoy

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hakre · Accepted Answer · 2012-06-23 09:49:47Z

0

You get so by obtaining the number with sscanf^Docs from the first key (manufacturer???_...) and then you can format the name key with sprintf^Docs:

foreach ($configOptions as $option) {
    list($refkey) = each($option);
    $number = sscanf($refkey, 'manufacturer%d_');
    if (NULL === $number) {
        throw new Exception('Could not find number in key "%s" or option %s.', $refkey, print_r($option, true));
    }
    $name = sprintf('manufacturer%d_name', $number);
}

answered Jun 23, 2012 at 9:49

hakre

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