(PHP 4, PHP 5, PHP 7)
array_splice — Remove a portion of the array and replace it with something else
&$input
, int $offset
[, int $length = count($input)
[, mixed $replacement = array()
]] )
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
replacementis not an array, it will be typecast to one (i.e.(array) $replacement). This may result in unexpected behavior when using an object orNULLreplacement.
inputThe input array.
offset
If offset is positive then the start of removed
portion is at that offset from the beginning of the
input array. If offset
is negative then it starts that far from the end of the
input array.
length
If length is omitted, removes everything
from offset to the end of the array. If
length is specified and is positive, then
that many elements will be removed. If
length is specified and is negative then
the end of the removed portion will be that many elements from
the end of the array. If length is
specified and is zero, no elements will be removed.
Tip: to remove everything from
offset to the end of the array when
replacement is also specified, use
count($input) for
length.
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.
Returns an array consisting of the extracted elements.
Example #1 array_splice() 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() examples
The following statements change the values of $input the same way:
<?php
// append two elements to $input
array_push($input, $x, $y);
array_splice($input, count($input), 0, array($x, $y));
// remove the last element of $input
array_pop($input);
array_splice($input, -1);
// remove the first element of $input
array_shift($input);
array_splice($input, 0, 1);
// insert an element at the start of $input
array_unshift($input, $x, $y);
array_splice($input, 0, 0, array($x, $y));
// replace the value in $input at index $x
$input[$x] = $y; // for arrays where key equals offset
array_splice($input, $x, 1, $y);
?>