Detect part of a name of var

[zzz]

I submit a form and need to be able to detect if an item from a particular group has been submitted. For example. I post a form and get the following results:

$_POST['apples_red'] == 20;
$_POST['apples_green'] == 20;
$_POST['apples_yellow'] == 20;
$_POST['bananas_yellow] == 20;

Is there away to detect is at least one posted result contains the word 'apples'?

[wilku]

$apples = false;//no apples yet

foreach ($_POST as $key => $val)//let's search all the POST keys
{
  if (strpos($key,'apples') !== false)//found some apples
  {
    $apples = true;
    break;
  }
}

[NogDog]

Another possibility to consider is using another array dimension. Instead of the form element being named "apples_red", instead set the name to "apples[red]", "apples[green]", and so forth. Then if you want to know if any apples were received in the post data:

if(isset($_POST['apples']))
{
   echo "Yes, apples were selected.<br />";
   foreach($_POST['apples'] as $color => $value)
   {
      echo "$color: $value<br />\n";
   }
}