foreach() - is this possible?

[jme]

I have a form that passes a number of variables when submitted.

Among these are some variables named 'LA_number_number'. Eg.:

$_POST['LA_23_643']

However there could be between 1 and 70 of these variables passed (depending on the users history) when then form is submitted. Is there a way that I could use a wildcard (maybe using foreach) where it would be something like:

foreach variable $POST['LA*'] do something?

Is this possible? I've really hit a brick wall with this one.

Thanks in advance.

[bradgrafelman]

Is it possible for you to change the form? It'd be easier if you submitted an array, e.g.

<input type="hidden" name="LA[23][643]">

or

<input type="hidden" name="LA[23_643]">

Otherwise, you could rig up something with [man]array_search/man on the array returned by [man]array_keys/man (e.g. grab the keys of the $POST array, search for "LA").

[Ashley_Sheridan]

You could iterate the $_POST array with a foreach, then check the key to see if it is in the correct format:

foreach($_POST as $key => $value)
{
    $parts = explode('_',$key);
    // check the various parts here
}

If all the $POST variables are in the form LA_number_number, then $parts[0] will be 'LA' and $parts[1] and $parts[2] will be the numbers. You can then do your checks to determine what to do. If not all yur post data will be in this form, then an if statement that checks if $parts[0]=='LA' will determine if it's worth going ahead and looking for the number parts.

[Weedpacket]

For each key/value pair in the $POST array ($POST[$key]=$value)...
If $key starts with "LA_"...
set $LA_variables[$key] = $value;

In the absence of an array_filter_keys function.....

$la_variables = array();
foreach($_POST as $key=>$value)
	if(substr($key,0,3)=='LA_')
		$la_variables[$key]=$value;