str_repeat

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

str_repeat — Repeat a string

Опис

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

Returns string repeated times times.

Параметри

string

The string to be repeated.

times

Number of time the string string should be repeated.

times has to be greater than or equal to 0. If the times is set to 0, the function will return an empty string.

Значення, що повертаються

Returns the repeated string.

Приклади

Приклад #1 str_repeat() example

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

Поданий вище приклад виведе:

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

Прогляньте також

for
str_pad() - Pad a string to a certain length with another string
substr_count() - Count the number of substring occurrences

Improve This Page

Learn How To Improve This Page • Submit a Pull Request • Report a Bug

＋add a note

User Contributed Notes 4 notes

down

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
?,?,?

down

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

down

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;
}
?>

down

-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 ...

＋add a note