note 126520 added to function.preg-split

Beware that it is not safe to assume there are no empty values returned by PREG_SPLIT_NO_EMPTY, nor that you will see no delimiters if you use PREG_SPLIT_DELIM_CAPTURE, as there are some edge cases where these are not true. <?php # As expected, splitting a string by itself returns two empty strings: var_export(preg_split("/x/", "x")); array ( 0 => '', 1 => '', ) # But if we add PREG_SPLIT_NO_EMPTY, then instead of an empty array, we get the delimiter. var_export(preg_split("/x/", "x", PREG_SPLIT_NO_EMPTY)); array ( 0 => 'x', ) And if we try to split an empty string, then instead of an empty array, we get an empty string even with PREG_SPLIT_NO_EMPTY. var_export(preg_split("/x/", "", PREG_SPLIT_NO_EMPTY)); array ( 0 => '', ) ?> ---- Server IP: 45.112.84.4 Probable Submitter: 45.112.85.242 (proxied: 66.90.161.34) ---- Manual Page -- https://php.net/manual/en/function.preg-split.php Edit -- https://main.php.net/note/edit/126520 Del: integrated -- https://main.php.net/note/delete/126520/integrated Del: useless -- https://main.php.net/note/delete/126520/useless Del: bad code -- https://main.php.net/note/delete/126520/bad+code Del: spam -- https://main.php.net/note/delete/126520/spam Del: non-english -- https://main.php.net/note/delete/126520/non-english Del: in docs -- https://main.php.net/note/delete/126520/in+docs Del: other reasons-- https://main.php.net/note/delete/126520 Reject -- https://main.php.net/note/reject/126520 Search -- https://main.php.net/manage/user-notes.php