Req #31659 [Com]: array_map to take non-array parameters and pass them to the callback function

Edit report at https://bugs.php.net/bug.php?id=31659&edit=1 ID: 31659 Comment by: lucas at threeam dot com dot au Reported by: zizka at seznam dot cz Summary: array_map to take non-array parameters and pass them to the callback function Status: Wont fix Type: Feature/Change Request Package: *General Issues PHP Version: 5.0.1 Block user comment: N Private report: N New Comment: Anonymous functions don't obviate the usefulness of scalar arguments to array_map (from the 3rd argument onwards, anyway). To work around this, use array_fill(). Using the previous example, this would be: $a = array_map('str_replace', $a, array_fill(0, count($a), 'X'), array_fill(0, count($a), 'Y')); Previous Comments: ------------------------------------------------------------------------ [2014-12-31 15:52:44] nikic@php.net This use-case should be covered by anonymous functions (since PHP 5.3). ------------------------------------------------------------------------ [2005-03-01 19:45:23] zizka at seznam dot cz Another solution is to pass arrays with several identical members: $a = explode(' ', 'XyX aXb sXs'); $a = array_map('str_replace', Array('X','X','X'), Array('Y','Y','Y'), $a); But the arrays are superfluous in this case, as a scalar value would be enough. And with this case there is a problem that the supplementary arrays must be of at least the same length as $a: PHP Manual: "Usually when using two or more arrays, they should be of equal length because the callback function is applied in parallel to the corresponding elements. If the arrays are of unequal length, the shortest one will be extended with empty elements." ------------------------------------------------------------------------ [2005-01-22 22:08:44] zizka at seznam dot cz Description: ------------ array_map could take non-array parameters and pass them to the callback function in each step. Example: $a = explode(' ', 'XyX aXb sXs'); $a = array_map('str_replace', 'X','Y', $a); That would result in calling: str_replace('X','Y', $a[...]); and the result array would be like Array('YyY', 'aYb', 'sYs'); Now I have to define a callback function for many simple operations that could be done this way. Thanks, Ondra Zizka Reproduce code: --------------- $a = explode(' ', 'XyX aXb sXs'); $a = array_map('str_replace', 'X','Y', $a); print_r($a); Expected result: ---------------- Array( [0] => YyY [1] => aYb [2] => sYs ) Actual result: -------------- Warning: array_map() [function.array-map.htm]: Argument #2 should be an array in ... ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=31659&edit=1