SPLFIXEDARRAY(3)							 1							  SPLFIXEDARRAY(3)

The SplFixedArray class

INTRODUCTION
The SplFixedArray class provides the main functionalities of array. The main differences between a SplFixedArray and a normal PHP array is that the SplFixedArray is of fixed length and allows only integers within the range as indexes. The advantage is that it allows a faster array implementation. CLASS SYNOPSIS
SplFixedArray SplFixedArrayIteratorArrayAccessCountable Methods o public SplFixedArray::__construct ([int $size]) o public int SplFixedArray::count (void ) o public mixed SplFixedArray::current (void ) o publicstatic SplFixedArray SplFixedArray::fromArray (array $array, [bool $save_indexes = true]) o public int SplFixedArray::getSize (void ) o public int SplFixedArray::key (void ) o public void SplFixedArray::next (void ) o public bool SplFixedArray::offsetExists (int $index) o public mixed SplFixedArray::offsetGet (int $index) o public void SplFixedArray::offsetSet (int $index, mixed $newval) o public void SplFixedArray::offsetUnset (int $index) o public void SplFixedArray::rewind (void ) o public int SplFixedArray::setSize (int $size) o public array SplFixedArray::toArray (void ) o public bool SplFixedArray::valid (void ) o public void SplFixedArray::__wakeup (void ) EXAMPLES
Example #1 SplFixedArray usage example <?php // Initialize the array with a fixed length $array = new SplFixedArray(5); $array[1] = 2; $array[4] = "foo"; var_dump($array[0]); // NULL var_dump($array[1]); // int(2) var_dump($array["4"]); // string(3) "foo" // Increase the size of the array to 10 $array->setSize(10); $array[9] = "asdf"; // Shrink the array to a size of 2 $array->setSize(2); // The following lines throw a RuntimeException: Index invalid or out of range try { var_dump($array["non-numeric"]); } catch(RuntimeException $re) { echo "RuntimeException: ".$re->getMessage()." "; } try { var_dump($array[-1]); } catch(RuntimeException $re) { echo "RuntimeException: ".$re->getMessage()." "; } try { var_dump($array[5]); } catch(RuntimeException $re) { echo "RuntimeException: ".$re->getMessage()." "; } ?> The above example will output: NULL int(2) string(3) "foo" RuntimeException: Index invalid or out of range RuntimeException: Index invalid or out of range RuntimeException: Index invalid or out of range PHP Documentation Group SPLFIXEDARRAY(3)