WordPress Version: 5.1
/**
* Converts the keys of an array to lowercase.
*
* @since 1.0.0
*
* @param array $inarray Unfiltered array.
* @return array Fixed array with all lowercase keys.
*/
function wp_kses_array_lc($inarray)
{
$outarray = array();
foreach ((array) $inarray as $inkey => $inval) {
$outkey = strtolower($inkey);
$outarray[$outkey] = array();
foreach ((array) $inval as $inkey2 => $inval2) {
$outkey2 = strtolower($inkey2);
$outarray[$outkey][$outkey2] = $inval2;
}
}
return $outarray;
}