(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplFixedArray::setSize — Change the size of an array
   Change the size of an array to the new size of size. If 
   size is less than the current array size, any values after the new size 
   will be discarded. If size is greater than the current array size, the 
   array will be padded with null values.
  
   Always returns true.
  
   Throws ValueError when
   size is less than zero.
  
| Version | Description | 
|---|---|
| 8.4.0 | SplFixedArray::setSize() now has a tentative return of true. | 
Example #1 SplFixedArray::setSize() example
<?php
   $array = new SplFixedArray(5);
   echo $array->getSize()."\n";
   $array->setSize(10);
   echo $array->getSize()."\n";
?>The above example will output:
5 10
