Edit Report a Bug

    str_repeat

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

    str_repeat — Repite un string

    Descripción

    str_repeat(string $input, int $multiplier): string

    Devuelve el input repetido multiplier veces.

    Parámetros

    input

    El string a ser repetido.

    multiplier

    El número de veces que el string input debe ser repetido.

    multiplier debe ser mayor o igual a 0. Si el multiplier se establece en 0, la función devolverá un string vacío.

    Valores devueltos

    Devuelve el string repetido.

    Ejemplos

    Ejemplo #1 Ejemplo de str_repeat()

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

    El resultado del ejemplo sería:

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

    Ver también

    • for
    • str_pad() - Rellena un string hasta una longitud determinada con otro string
    • substr_count() - Cuenta el número de apariciones del substring

    add a note add a note

    User Contributed Notes 5 notes

    up
    34
    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
    3
    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 ...
    up
    2
    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
    0
    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
    -4
    Anonymous
    21 years ago
    str_repeat does not repeat symbol with code 0 on some (maybe all?) systems (tested on PHP Version 4.3.2 , FreeBSD 4.8-STABLE i386 ).

    Use <pre>
    while(strlen($str) < $desired) $str .= chr(0);
    </pre> to have string filled with zero-symbols.
    add a note add a note
    To Top