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)

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)