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    QuickHashIntHash::exists

    (PECL quickhash >= Unknown)

    QuickHashIntHash::exists — This method checks whether a key is part of the hash

    説明

    public QuickHashIntHash::exists(int $key): bool

    This method checks whether an entry with the provided key exists in the hash.

    パラメータ

    key

    The key of the entry to check for whether it exists in the hash.

    戻り値

    Returns true when the entry was found, or false when the entry is not found.

    例

    例1 QuickHashIntHash::exists() example

    <?php
    //generate 200000 elements
    $array = range( 0, 199999 );
    $existingEntries = array_rand( array_flip( $array ), 180000 );
    $testForEntries = array_rand( array_flip( $array ), 1000 );
    $foundCount = 0;

    echo     "Creating hash: ", microtime( true ), "\n";
    $hash = new QuickHashIntHash( 100000 );
    echo     "Adding elements: ", microtime( true ), "\n";
    foreach(     $existingEntries as $key )
    {
    $hash->add( $key, 56 );
    }

    echo     "Doing 1000 tests: ", microtime( true ), "\n";
    foreach(     $testForEntries as $key )
    {
    $foundCount += $hash->exists( $key );
    }
    echo     "Done, $foundCount found: ", microtime( true ), "\n";
    ?>

    上の例の出力は、 たとえば以下のようになります。

    Creating hash: 1263588703.0748
Adding elements: 1263588703.0757
Doing 1000 tests: 1263588703.7851
Done, 898 found: 1263588703.7897

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