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SplFixedArray::fromArray

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

SplFixedArray::fromArrayImport a PHP array in a SplFixedArray instance

Description

public static SplFixedArray::fromArray(array $array, bool $preserveKeys = true): SplFixedArray

Import the PHP array array in a new SplFixedArray instance

Parameters

array

The array to import.

preserveKeys

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

Return Values

Returns an instance of SplFixedArray containing the array content.

Examples

Example #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);
?>

The above example will output:

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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5
MuLoT
10 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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