aggregate_info(3) [php man page]

AGGREGATE_INFO(3)							 1							 AGGREGATE_INFO(3)

aggregate_info - Gets aggregation information for a given object

SYNOPSIS

       array aggregate_info (object  $object)

DESCRIPTION

	Gets the aggregation information for the given $object.

PARAMETERS

	      o $object
		-

RETURN VALUES

	Returns the aggregation information as an associative array of arrays of methods and properties. The key for the main array is the name of
       the aggregated class.

EXAMPLES

       Example #1

	      Using aggregate_info(3)

	      <?php

	      class Slicer {
		  var $vegetable;

		  function Slicer($vegetable)
		  {
		      $this->vegetable = $vegetable;
		  }

		  function slice_it($num_cuts)
		  {
		      echo "Doing some simple slicing
";
		      for ($i=0; $i < $num_cuts; $i++) {
			  // do some slicing
		      }
		  }
	      }

	      class Dicer {
		  var $vegetable;
		  var $rotation_angle = 90;   // degrees

		  function Dicer($vegetable)
		  {
		      $this->vegetable = $vegetable;
		  }

		  function dice_it($num_cuts)
		  {
		      echo "Cutting in one direction
";
		      for ($i=0; $i < $num_cuts; $i++) {
			  // do some cutting
		      }
		      $this->rotate($this->rotation_angle);
		      echo "Cutting in a second direction
";
		      for ($i=0; $i < $num_cuts; $i++) {
			  // do some more cutting
		      }
		  }

		  function rotate($deg)
		  {
		      echo "Now rotating {$this->vegetable} {$deg} degrees
";
		  }

		  function _secret_super_dicing($num_cuts)
		  {
		      // so secret we cannot show you ;-)
		  }
	      }

	      $obj = new Slicer('onion');
	      aggregate($obj, 'Dicer');
	      print_r(aggregate_info($obj));
	      ?>

	      The above example will output:

	      Array
	      (
		  [dicer] => Array
		      (
			  [methods] => Array
			      (
				  [0] => dice_it
				  [1] => rotate
			      )

			  [properties] => Array
			      (
				  [0] => rotation_angle
			      )

		      )

	      )
	As you can see, all properties and methods of the Dicer class have been aggregated into our new object, with the exception  of	the  class
       constructor and the method _secret_super_dicing

SEE ALSO

       aggregate(3),  aggregate_methods(3), aggregate_methods_by_list(3), aggregate_methods_by_regexp(3), aggregate_properties(3), aggregate_prop-
       erties_by_list(3), aggregate_properties_by_regexp(3), deaggregate(3).

PHP Documentation Group 													 AGGREGATE_INFO(3)

ARRAY_FILTER(3) 							 1							   ARRAY_FILTER(3)

array_filter - Filters elements of an array using a callback function

SYNOPSIS

       array array_filter (array  $array, [callable  $callback], [int  $flag])

DESCRIPTION

	Iterates  over	each value in the $array passing them to the $callback function. If the $callback function returns true, the current value
       from $array is returned into the result array. Array keys are preserved.

PARAMETERS

	      o $array
		- The array to iterate over

	      o $callback
		- The callback function to use	If no $callback is supplied, all entries of $array equal to FALSE (see converting to boolean) will
		be removed.

	      o $flag
		- Flag determining what arguments are sent to $callback:

		     o ARRAY_FILTER_USE_KEY - pass key as the only argument to $callback instead of the value

		     o ARRAY_FILTER_USE_BOTH - pass both value and key as arguments to $callback instead of the value

RETURN VALUES

	Returns the filtered array.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.6.0	|						    |
       |	|						    |
       |	|  Added  optional  $flag  parameter  and constants |
       |	| ARRAY_FILTER_USE_KEY and ARRAY_FILTER_USE_BOTH    |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

       Example #1

	      array_filter(3) example

	      <?php
	      function odd($var)
	      {
		  // returns whether the input integer is odd
		  return($var & 1);
	      }

	      function even($var)
	      {
		  // returns whether the input integer is even
		  return(!($var & 1));
	      }

	      $array1 = array("a"=>1, "b"=>2, "c"=>3, "d"=>4, "e"=>5);
	      $array2 = array(6, 7, 8, 9, 10, 11, 12);

	      echo "Odd :
";
	      print_r(array_filter($array1, "odd"));
	      echo "Even:
";
	      print_r(array_filter($array2, "even"));
	      ?>

	      The above example will output:

	      Odd :
	      Array
	      (
		  [a] => 1
		  [c] => 3
		  [e] => 5
	      )
	      Even:
	      Array
	      (
		  [0] => 6
		  [2] => 8
		  [4] => 10
		  [6] => 12
	      )

       Example #2

	      array_filter(3) without $callback

	      <?php

	      $entry = array(
			   0 => 'foo',
			   1 => false,
			   2 => -1,
			   3 => null,
			   4 => ''
			);

	      print_r(array_filter($entry));
	      ?>

	      The above example will output:

	      Array
	      (
		  [0] => foo
		  [2] => -1
	      )

       Example #3

	      array_filter(3) with $flag

	      <?php

	      $arr = ['a' => 1, 'b' => 2, 'c' => 3, 'd' => 4];

	      var_dump(array_filter($arr, function($k) {
		  return $k == 'b';
	      }, ARRAY_FILTER_USE_KEY));

	      var_dump(array_filter($arr, function($v, $k) {
		  return $k == 'b' || $v == 4;
	      }, ARRAY_FILTER_USE_BOTH));
	      ?>

	      The above example will output:

	      array(1) {
		["b"]=>
		int(2)
	      }
	      array(2) {
		["b"]=>
		int(2)
		["d"]=>
		int(4)
	      }

NOTES

       Caution

	       If the array is changed from the callback function (e.g. element added, deleted or unset) the behavior of this  function  is  unde-
	      fined.

SEE ALSO

       array_map(3), array_reduce(3), array_walk(3).

PHP Documentation Group 													   ARRAY_FILTER(3)