str_replace

str_pad

Last updated: Fri, 27 Nov 2009

str_repeat

(PHP 4, PHP 5)

str_repeat — Repeat a string

Description

string str_repeat ( string $input , int $multiplier )

Returns input repeated multiplier times.

Parameters

input

The string to be repeated.

multiplier

Number of time the input string should be repeated.

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

Return Values

Returns the repeated string.

Examples

Example #1 str_repeat() example


<?php
echo str_repeat("-=", 10);
?>

The above example will output:

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


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

?,?,?

claude dot pache at gmail dot com
10-Feb-2009 10:25


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;

}

?>

Kees van Dieren
16-Jan-2009 09:26


Needed a function to repeat a string with a separator.



<?php

/**

 * Repeats <tt>$string</tt> <tt>$multiplier</tt> times, separated with <tt>$sep</tt>.

 *

 * str_repeat_sep('?', ',', 3) ==> "?,?,?"

 * str_repeat_seap('..', '/', 3) ==> "../../.."

 *

 * @param string $string

 * @param string $sep

 * @param int $multiplier

 * @return string

 */

function str_repeat_sep($string, $sep, $multiplier) {

  $ret = "";

  for($i=0;$i<$multiplier;$i++) {

    if ($i) $ret.=$sep;

    $ret.=$string;

  }

  return $ret;

}

?>

Alper Kaya
30-Jun-2007 10:09


If you want to hide a part of your password, you can use this code. It's very simple and might be required in your user management panel.



<?php

$password = "12345abcdef";

$visibleLength = 4; // 4 chars from the beginning



echo substr($password,0,4).str_repeat("*", (strlen($password)-$visibleLength));

?>

15-Sep-2005 02:32


In reply to what Roland Knall wrote:



It is much simpler to use printf() or sprintf() for leading zeros.



<?php

   printf("%05d<br>\n",  1); // Will echo 00001

   sprintf("%05d<br>\n",  1); // Will return 00001

?>

21-Jul-2003 05:45


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.

dakota at dir dot bg
25-Jun-2002 10:06


Note that the first argument is parsed only once, so it's impossible to do things like this:



echo str_repeat(++$i, 10);



The example will produce 10 times the value of $i+1, and will not do a cycle from $i to $i+10.

bryantSPAMw at geocities dot SPAM dot com
25-Oct-2001 11:16


(For the benefit of those searching the website:)





This is the equivalent of Perl's "x" (repetition) operator, for eg.  str_repeat("blah", 8) in PHP does the same thing as "blah" x 8 in Perl.

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