Entry

If I define $array[10000], will PHP use/reserve memory for $array[0] - [9999]?

Apr 11th, 2002 05:39
Mike Ford, Joost Cassee,

No.

PHP only creates array elements when you actually assign a value to 
them.  This is because of the associative nature of PHP arrays.

As a corollary, you can also un-assign individual elements:

   unset($arr[99]);