I'm looking for a way to make array_unique case-insensitive, so, for example, it would turn array('Rock', 'rock', 'Pop') into array('Rock', 'Pop'). I don't particularly mind which of the differently-cased variations makes it into the final array, just so long as there aren't any case-based duplicates. Any ideas?
Thanks,
//BHolley
My idea would be to make all array values lowercase (array_map) before using array_unique.
Or you could do this:
function array_iunique($arr)
{
foreach ($arr as $key => $value) {
$arr[$key] = strtolower($value); // Or uc_first(), etc.
}
return array_unique($arr);
}
$new_array = array_iunique($array);Okay, I figured something out. I didn't want to auto-lowercase everyting, since its kinda dumb to do that if they're all uppercase or whatever.
Here's the function (part of the GPL project muswap):
function array_iunique($array) {
/* Sort the array so it's alphabetical and so items beginning in uppercase (like OCRemix, which are usually more precise unless the user goes nuts with capslock) over lowercase ones (ocremix) */
usort($array, 'strcmp');
/* We make a reference array that is truly unique (but all lower case) to compare against */
$finalArray = array(); /* Declare it as blank first, just in case) */
$referenceArray = array();
/* Every value has its lower-case equivalent compared to the reference array. If it's not there, it gets added in lowercase form to the reference array and in regular form to the final array. */
foreach($array as $item) {
if(!in_array(strtolower($item), $referenceArray)) {
$finalArray[] = $item;
$referenceArray[] = strtolower($item);
}
}
return $finalArray;
}