Re: Proposal for new array_map function to pass in keys

> function my_call_back($key, $value) { > return array($value, strlen($value)); > } > $array = str_word_count("PHP is lots of fun!"); > $array = array_map_key('my_call_back', $array); > > > The result would be the following array: > > array(5) { > ["PHP"]=> > int(3) > ["is"]=> > int(2) > ["lots"]=> > int(4) > ["of"]=> > int(2) > ["fun"]=> > int(3) > } > > This example doesn't make any sense, as str_word_count returns an integer, so you would in fact pass an int to array_map_key and not an array. But let's say using your example, you use explode(" ", $string) instead of str_word_count, which will give you an array of all the words. What happens in the following case: function my_call_back($key, $value) { return array($value, strlen($value)); } $array = str_word_count("PHP stands for PHP hypertext preprocessor"); $array = array_map_key('my_call_back', $array); This would give you 2 keys with the value of PHP. What happens in this case? What if you have duplicate integer keys. Does the keys simply increment or throw an error?