PHP 5.4.31 Released

SplFixedArray::fromArray

(PHP 5 >= 5.3.0)

SplFixedArray::fromArrayImport a PHP array in a SplFixedArray instance

Beschreibung

public static SplFixedArray SplFixedArray::fromArray ( array $array [, bool $save_indexes = true ] )

Import the PHP array array in a new SplFixedArray instance

Parameter-Liste

array

The array to import.

save_indexes

Try to save the numeric indexes used in the original array.

R├╝ckgabewerte

Returns an instance of SplFixedArray containing the array content.

Beispiele

Beispiel #1 SplFixedArray::fromArray() example

<?php
$fa 
SplFixedArray::fromArray(array(=> 1=> 2=> 3));

var_dump($fa);

$fa SplFixedArray::fromArray(array(=> 1=> 2=> 3), false);

var_dump($fa);
?>

Das oben gezeigte Beispiel erzeugt folgende Ausgabe:

object(SplFixedArray)#1 (4) {
  [0]=>
  int(2)
  [1]=>
  int(1)
  [2]=>
  NULL
  [3]=>
  int(3)
}
object(SplFixedArray)#2 (3) {
  [0]=>
  int(1)
  [1]=>
  int(2)
  [2]=>
  int(3)
}

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User Contributed Notes 1 note

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MuLoT
3 years ago
Memory footprint tests :

<?php
echo memory_get_usage()."\n"; // display 627760
$array = array_fill( 0, 2048, 'a' );
echo
memory_get_usage()."\n"; // 824744, so 196984 for $array

unset( $array );

echo
memory_get_usage()."\n"; // 627792
$spl=SplFixedArray::fromArray( array_fill( 0, 2048, 'a' ) );
echo
memory_get_usage()."\n"; //644944, so just 17151 for $spl !!!
?>
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