note 26434 deleted from function.array-key-exists by philip

I got stuck trying to figure out the correct test on an array key/value. I wrote this to help me see the difference. I hope it helps someone save a few minutes. # Unremark one of these declarations to see the effect. # $qwerty=array(); # $qwerty["badge"]=null; # $qwerty["badge"]=""; # $qwerty["badge"]="test_data"; # Test if the array exists at all if (!isset($qwerty)) { print "<p>Failed isset on array \n";} # Test if the key exists in the array - doesn't check or care about a value yet if (!array_key_exists("badge",$qwerty)) { print "<p>Failed array_key_exists \n";} # Test if the key has been assigned a value during this run (could be "") if (!isset($qwerty["badge"])) { print "<p>Failed isset on array key value \n";} # Test if the key has a value of any sort (not true if "") if (!($qwerty["badge"])) { print "<p>Failed contents examination of array key value \n";}