note 92838 added to function.in-array

The function which Robin is proposing is known as an Iterative (as opposed to Recursive) Binary Search. It is indeed faster, but can only be used in situations when the haystack is in ascending order. If the haystack is not sorted it may return incorrect results. For this reason it cannot always be used as a direct replacement for in_array. For general purpose arrays, in_array is as good as it gets. ---- Server IP: 69.147.83.197 Probable Submitter: 72.77.26.129 ---- Manual Page -- http://www.php.net/manual/en/function.in-array.php Edit -- https://master.php.net/note/edit/92838 Del: integrated -- https://master.php.net/note/delete/92838/integrated Del: useless -- https://master.php.net/note/delete/92838/useless Del: bad code -- https://master.php.net/note/delete/92838/bad+code Del: spam -- https://master.php.net/note/delete/92838/spam Del: non-english -- https://master.php.net/note/delete/92838/non-english Del: in docs -- https://master.php.net/note/delete/92838/in+docs Del: other reasons-- https://master.php.net/note/delete/92838 Reject -- https://master.php.net/note/reject/92838 Search -- https://master.php.net/manage/user-notes.php