array_slice(3) [php man page]

ARRAY_SLICE(3)								 1							    ARRAY_SLICE(3)

array_slice - Extract a slice of the array

SYNOPSIS

       array array_slice NULL (array  $array, int  $offset, [int  $length], [bool  $preserve_keys = false])

DESCRIPTION

       array_slice(3) returns the sequence of elements from the array $array as specified by the $offset and $length parameters.

PARAMETERS

	      o $array
		- The input array.

	      o $offset
		-  If  $offset	is  non-negative,  the sequence will start at that offset in the $array. If $offset is negative, the sequence will
		start that far from the end of the $array.

	      o $length
		- If $length is given and is positive, then the sequence will have up to that many elements in it. If the array  is  shorter  than
		the  $length,  then  only the available array elements will be present. If $length is given and is negative then the sequence will
		stop that many elements from the end of the array. If it is omitted, then the sequence will have everything from $offset up  until
		the end of the $array.

	      o $preserve_keys
		-  Note  that array_slice(3) will reorder and reset the numeric array indices by default. You can change this behaviour by setting
		$preserve_keys to TRUE.

RETURN VALUES

	Returns the slice.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.2.4	|						    |
       |	|						    |
       |	|  The default value of the $length  parameter	was |
       |	| changed  to  NULL.  A  NULL$length  now tells the |
       |	| function to use the length of  $array.  Prior  to |
       |	| this	version,  a NULL$length was taken to mean a |
       |	| zero length (nothing will be returned).	    |
       |	|						    |
       | 5.0.2	|						    |
       |	|						    |
       |	|  The optional $preserve_keys parameter was added. |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

       Example #1

	      array_slice(3) examples

	      <?php
	      $input = array("a", "b", "c", "d", "e");

	      $output = array_slice($input, 2);      // returns "c", "d", and "e"
	      $output = array_slice($input, -2, 1);  // returns "d"
	      $output = array_slice($input, 0, 3);   // returns "a", "b", and "c"

	      // note the differences in the array keys
	      print_r(array_slice($input, 2, -1));
	      print_r(array_slice($input, 2, -1, true));
	      ?>

	      The above example will output:

	      Array
	      (
		  [0] => c
		  [1] => d
	      )
	      Array
	      (
		  [2] => c
		  [3] => d
	      )

SEE ALSO

       array_splice(3), unset(3), array_chunk(3).

PHP Documentation Group 													    ARRAY_SLICE(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)