PHP Functions Essential Reference

array_splice

array array_splice(array array, int offset, [int length], [array replacement]) 

array	Array to act on
offset	Starting element index
length	Length of segment to replace
replacement	Array of replacement elements

Replaces part of an array with another array.

Returns:

Array of elements deleted from the original array; NULL on failure

Description:

This function deletes the elements of array starting at the position given by offset . If offset is positive, it gives the number of elements from the beginning of array from which to start deleting; if negative, it gives the number of elements from the end at which to start deleting.

array is altered in place, and an array containing the deleted elements is returned.

If length is given ...