PHP Functions Essential Reference

array_unshift

int array_unshift(array array, mixed var, mixed ...) 

array	Array to modify
var	Value to prepend to array
...	Further values to prepend to array

Pushes the list of elements onto the given array.

Returns:

Number of elements in the revised array; NULL on failure

Description:

Prepends the new elements onto array in the order given as arguments. The first element in the argument list becomes the first element in the array. Returns the number of elements in the revised array. This function changes the original array.

Combined with array_pop(), this function can be used to make an array act in FIFO (first-in-first-out) fashion.

Version:

PHP 4

See also:

array_pop() 
array_push() 
array_shift() 

Example:

Push values onto the beginning ...