How to remove prefix in array keys

Question

I try to remove a prefix in array keys and every attempt is failing. What I want to achieve is to:

Having: Array ( [attr_Size] => 3 [attr_Colour] => 7 )

To Get: Array ( [Size] => 3 [Colour] => 7 )

Your help will be much appreciated...

Answer 1

If I understood your question, you don't have to use implode() to get what you want.

define(PREFIX, 'attr_');

$array = array('attr_Size' => 3, 'attr_Colour' => 7);

$prefixLength = strlen(PREFIX);

foreach($array as $key => $value)
{
  if (substr($key, 0, $prefixLength) === PREFIX)
  {
    $newKey = substr($key, $prefixLength);
    $array[$newKey] = $value;
    unset($array[$key]);
  }
}

print_r($array); // shows: Array ( [Size] => 3 [Colour] => 7 )