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array_reduce(3) [php man page]

ARRAY_REDUCE(3) 							 1							   ARRAY_REDUCE(3)

array_reduce - Iteratively reduce the array to a single value using a callback function

SYNOPSIS
mixed array_reduce NULL (array $array, callable $callback, [mixed $initial]) DESCRIPTION
array_reduce(3) applies iteratively the $callback function to the elements of the $array, so as to reduce the array to a single value. PARAMETERS
o $array - The input array. o $callback - mixed callback (mixed $carry, mixed $item) o $carry - Holds the return value of the previous iteration; in the case of the first iteration it instead holds the value of $ini- tial. o $item - Holds the value of the current iteration. o $initial - If the optional $initial is available, it will be used at the beginning of the process, or as a final result in case the array is empty. RETURN VALUES
Returns the resulting value. If the array is empty and $initial is not passed, array_reduce(3) returns NULL. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.3.0 | | | | | | | Changed $initial to allow mixed, previously | | | integer. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 array_reduce(3) example <?php function sum($carry, $item) { $carry += $item; return $carry; } function multiplication($carry, $item) { $carry *= $item; return $carry; } $a = array(1, 2, 3, 4, 5); $x = array(); var_dump(array_reduce($a, "sum")); // int(15) var_dump(array_reduce($a, "multiplication", 10)); // int(1200), because: 10*1*2*3*4*5 var_dump(array_reduce($x, "sum", "No data to reduce")); // string(17) "No data to reduce" ?> SEE ALSO
array_filter(3), array_map(3), array_unique(3), array_count_values(3). PHP Documentation Group ARRAY_REDUCE(3)

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EIO_STAT(3)								 1							       EIO_STAT(3)

eio_stat - Get file status

SYNOPSIS
resource eio_stat (string $path, int $pri, callable $callback, [mixed $data = NULL]) DESCRIPTION
eio_stat(3) returns file status information in $result argument of $callback PARAMETERS
o $path - The file path o $pri -The request priority: EIO_PRI_DEFAULT, EIO_PRI_MIN, EIO_PRI_MAX, or NULL. If NULL passed, $pri internally is set to EIO_PRI_DEFAULT. o $callback -$callback function is called when the request is done. It should match the following prototype: void callback(mixed $data, int $result[, resource $req]); o $data -is custom data passed to the request. o $result -request-specific result value; basically, the value returned by corresponding system call. o $req -is optional request resource which can be used with functions like eio_get_last_error(3) o $data - Arbitrary variable passed to $callback. RETURN VALUES
eio_stat(3) returns request resource on success or FALSE on error. On success assigns $result argument of $callback to an array. EXAMPLES
Example #1 eio_stat(3) example <?php $tmp_filename = "eio-file.tmp"; touch($tmp_filename); function my_res_cb($data, $result) { var_dump($data); var_dump($result); } function my_open_cb($data, $result) { eio_close($result); eio_event_loop(); @unlink($data); } eio_stat($tmp_filename, EIO_PRI_DEFAULT, "my_res_cb", "eio_stat"); eio_open($tmp_filename, EIO_O_RDONLY, NULL, EIO_PRI_DEFAULT, "my_open_cb", $tmp_filename); eio_event_loop(); ?> The above example will output something similar to: string(8) "eio_stat" array(12) { ["st_dev"]=> int(2050) ["st_ino"]=> int(2489173) ["st_mode"]=> int(33188) ["st_nlink"]=> int(1) ["st_uid"]=> int(1000) ["st_gid"]=> int(100) ["st_rdev"]=> int(0) ["st_blksize"]=> int(4096) ["st_blocks"]=> int(0) ["st_atime"]=> int(1318250380) ["st_mtime"]=> int(1318250380) ["st_ctime"]=> int(1318250380) } SEE ALSO eio_lstat, eio_fstat. PHP Documentation Group EIO_STAT(3)

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