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    Generator::current

    (PHP 5 >= 5.5.0, PHP 7, PHP 8)

    Generator::current — yield した値を取得する

    説明

    public Generator::current(): mixed

    パラメータ

    この関数にはパラメータはありません。

    戻り値

    yield した値を返します。

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    User Contributed Notes 3 notes

    up
    2
    gib-o-master
    3 years ago
    current() advances untouched generator, same as next(), it makes the first step/iteration. the following calls will not.

    non-yielded value will be NULL
    up
    0
    ctx2002 at gmail dot com
    1 month ago
    I think what "gib-o-master" said is wrong.
    Generator::current method does not advances "untouched generator".

    let me give an example:

    function y1()
    {
    yield 1;
    }

    $g = y1();

    if ($g->valid()) { //at this point, PHP outputs "valid"
    echo "valid\n";
    }

    echo "current v:" . $g->current() . "\n"; //at this point, PHP outputs current v:1

    if ($g->valid()) { //at this point, PHP still outputs "valid"
    echo "valid\n";
    } else {
    echo "not valid\n";
    }

    if Generator::current method advances generator, then above If statement should outputs "not valid"
    up
    0
    mrsoftware73 at gmail dot com
    6 years ago
    <?php
    function gen_one_to_three() {
    for (    $i = 1; $i <= 3; $i++) {
    // Note that $i is preserved between yields.
    yield $i;
    }
    }

    $generator = gen_one_to_three();
    foreach (    $generator as $value) {
    echo     "regular : ".$value , PHP_EOL;
    echo     "With current function : ".$generator->current(),PHP_EOL;
    }
    ?>
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