Removing an Array Element

How can I remove an Array Element from my Array? For example: $myArray = array('100'=>'jibberjabber','200'=>'morejibberjabber','0'=>'----'); if(isset($myArray[0])) // here is where I want to purge Key[0] from the Array all together.... ; I check for the presence of Key[0], which may not be the first or last key in the array, so array_pop won't work... array_splice would be tricky and would like to avoid creating a FOREACH or FOR loop -- Basically, I just want to know if the Key is set, and if so -- remove it... is there a simple way to do this? Thanks Jason