array_rand(3) [php man page]

ARRAY_RAND(3)								 1							     ARRAY_RAND(3)

array_rand - Pick one or more random entries out of an array

SYNOPSIS

       mixed array_rand (array	$array, [int  $num = 1])

DESCRIPTION

	Picks one or more random entries out of an array, and returns the key (or keys) of the random entries.

PARAMETERS

	      o $array
		- The input array.

	      o $num
		- Specifies how many entries should be picked.

RETURN VALUES

	When  picking  only  one  entry,  array_rand(3)  returns the key for a random entry. Otherwise, an array of keys for the random entries is
       returned. This is done so that random keys can be picked from the array as well as random values. Trying to pick more elements  than  there
       are in the array will result in an E_WARNING level error, and NULL will be returned.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       |5.2.10	|						    |
       |	|						    |
       |	|  The	resulting  array of keys is no longer shuf- |
       |	| fled. 					    |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

       Example #1

	      array_rand(3) example

	      <?php
	      $input = array("Neo", "Morpheus", "Trinity", "Cypher", "Tank");
	      $rand_keys = array_rand($input, 2);
	      echo $input[$rand_keys[0]] . "
";
	      echo $input[$rand_keys[1]] . "
";
	      ?>

SEE ALSO

       shuffle(3).

PHP Documentation Group 													     ARRAY_RAND(3)

ARRAY_SPLICE(3) 							 1							   ARRAY_SPLICE(3)

array_splice - Remove a portion of the array and replace it with something else

SYNOPSIS

       array array_splice (array  &$input, int	$offset, [int  $length], [mixed  $replacement = array()])

DESCRIPTION

	Removes  the  elements	designated  by	$offset and $length from the $input array, and replaces them with the elements of the $replacement
       array, if supplied.

	Note that numeric keys in $input are not preserved.

       Note

	       If $replacement is not an array, it will be typecast to one (i.e. (array) $parameter). This may result in unexpected behavior  when
	      using an object or NULL$replacement.

PARAMETERS

	      o $input
		- The input array.

	      o $offset
		- If $offset is positive then the start of removed portion is at that offset from the beginning of the $input array. If $offset is
		negative then it starts that far from the end of the $input array.

	      o $length
		- If $length is omitted, removes everything from $offset to the end of the array. If $length is specified and  is  positive,  then
		that  many elements will be removed. If $length is specified and is negative then the end of the removed portion will be that many
		elements from the end of the array. If $length is specified and is zero, no elements will be removed. Tip:  to	remove	everything
		from $offset to the end of the array when $replacement is also specified, use count($input) for $length.

	      o $replacement
		-  If  $replacement  array  is	specified,  then  the removed elements are replaced with elements from this array.  If $offset and
		$length are such that nothing is removed, then the elements from the $replacement array are inserted in the place specified by the
		$offset.  Note	that  keys in replacement array are not preserved.  If $replacement is just one element it is not necessary to put
		array() around it, unless the element is an array itself, an object or NULL.

RETURN VALUES

	Returns the array consisting of the extracted elements.

EXAMPLES

       Example #1

	      array_splice(3) examples

	      <?php
	      $input = array("red", "green", "blue", "yellow");
	      array_splice($input, 2);
	      // $input is now array("red", "green")

	      $input = array("red", "green", "blue", "yellow");
	      array_splice($input, 1, -1);
	      // $input is now array("red", "yellow")

	      $input = array("red", "green", "blue", "yellow");
	      array_splice($input, 1, count($input), "orange");
	      // $input is now array("red", "orange")

	      $input = array("red", "green", "blue", "yellow");
	      array_splice($input, -1, 1, array("black", "maroon"));
	      // $input is now array("red", "green",
	      //	  "blue", "black", "maroon")

	      $input = array("red", "green", "blue", "yellow");
	      array_splice($input, 3, 0, "purple");
	      // $input is now array("red", "green",
	      //	  "blue", "purple", "yellow");
	      ?>

       Example #2

	      array_splice(3) examples

	       The following statements change the values of $input the same way:

	      <?php
	      array_push($input, $x, $y);
	      array_splice($input, count($input), 0, array($x, $y));
	      array_pop($input);
	      array_splice($input, -1);
	      array_shift($input);
	      array_splice($input, 0, 1);
	      array_unshift($input, $x, $y);
	      array_splice($input, 0, 0, array($x, $y));
	      $input[$x] = $y; // for arrays where key equals offset
	      array_splice($input, $x, 1, $y);
	      ?>

SEE ALSO

       array_slice(3), unset(3), array_merge(3).

PHP Documentation Group 													   ARRAY_SPLICE(3)