str_repeat

    (PHP 4, PHP 5, PHP 7, PHP 8)

    str_repeat — 文字列を反復する

    説明

    str_repeat(string $string, int $times): string

    string を times 回を繰り返した文字列を返します。

    パラメータ

    string

    繰り返す文字列。

    times

    string を繰り返す回数。

    times は 0 以上でなければなりません。 times が 0 に設定された場合、この関数は空文字を返します。

    戻り値

    繰り返した文字列を返します。

    例

    例1 str_repeat() の例

    <?php
    echo str_repeat("-=", 10);
    ?>

    上の例の出力は以下となります。

    -=-=-=-=-=-=-=-=-=-=

    参考

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    User Contributed Notes 4 notes

    up
    42
    Damien Bezborodov
    15 years ago
    Here is a simple one liner to repeat a string multiple times with a separator:

    <?php
    implode    ($separator, array_fill(0, $multiplier, $input));
    ?>

    Example script:
    <?php

    // How I like to repeat a string using standard PHP functions
    $input = 'bar';
    $multiplier = 5;
    $separator = ',';
    print     implode($separator, array_fill(0, $multiplier, $input));
    print     "\n";

    // Say, this comes in handy with count() on an array that we want to use in an
    // SQL query such as 'WHERE foo IN (...)'
    $args = array('1', '2', '3');
    print     implode(',', array_fill(0, count($args), '?'));
    print     "\n";
    ?>

    Example Output:
    bar,bar,bar,bar,bar
    ?,?,?
    up
    5
    Alexander Ovsiyenko
    6 years ago
    http://php.net/manual/en/function.str-repeat.php#90555

    Damien Bezborodov , yeah but execution time of your solution is 3-5 times worse than str_replace.

    <?php

    function spam($number) {
    return     str_repeat('test', $number);
    }

    function     spam2($number) {
    return     implode('', array_fill(0, $number, 'test'));
    }

    //echo spam(4);
    $before = microtime(true);
    for (    $i = 0; $i < 100000; $i++) {
    spam(10);
    }
    echo     microtime(true) - $before , "\n"; // 0.010297
    $before = microtime(true);
    for (    $i = 0; $i < 100000; $i++) {
    spam2(10);
    }
    echo     microtime(true) - $before; // 0.032104
    up
    0
    claude dot pache at gmail dot com
    15 years ago
    Here is a shorter version of Kees van Dieren's function below, which is moreover compatible with the syntax of str_repeat:

    <?php
    function str_repeat_extended($input, $multiplier, $separator='')
    {
    return     $multiplier==0 ? '' : str_repeat($input.$separator, $multiplier-1).$input;
    }
    ?>
    up
    -1
    Anonymous
    13 years ago
    hi guys ,
    i've faced this example :
    <?php

    $my_head     = str_repeat("°~", 35);
    echo     $my_head;

    ?>

    so , the length should be 35x2 = 70 !!!
    if we echo it :

    <?php
    $my_head     = str_repeat("°~", 35);
    echo     strlen($my_head); // 105
    echo mb_strlen($my_head, 'UTF-8'); // 70
    ?>

    be carefull with characters and try to use mb_* package to make sure everything goes well ...
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