rtrim

(PHP 4, PHP 5)

rtrim — Supprime les espaces (ou d'autres caractères) de fin de chaîne

Description

string rtrim ( string $str [, string $charlist ] )

rtrim() retourne la chaîne str , après avoir supprimé tous les caractères blancs de fin de chaîne. Appelée sans le second paramètre, rtrim() supprimera les caractères suivants :

" " (ASCII 32 (0x20)), un espace ordinaire.
"\t" (ASCII 9 (0x09)), une tabulation.
"\n" (ASCII 10 (0x0A)), une nouvelle ligne (line feed).
"\r" (ASCII 13 (0x0D)), un retour chariot (carriage return).
"\0" (ASCII 0 (0x00)), le caractère NUL.
"\x0B" (ASCII 11 (0x0B)), une tabulation verticale.

Il est aussi possible de spécifier les caractères à supprimer en utilisant le paramètre charlist . Listez simplement les caractères que vous voulez supprimer dans ce paramètre. Avec .., vous pourrez spécifier des intervalles de caractères.

Exemple #1 Exemple avec rtrim()


<?php

$text = "\t\tVoici quelques mots :) ...  ";
$binary = "\x09Exemple de chaîne\x0A";
$hello  = "Bonjour le monde !";
var_dump($text, $binary, $hello);

print "\n";

$trimmed = rtrim($text);
var_dump($trimmed);

$trimmed = rtrim($text, " \t.");
var_dump($trimmed);

$trimmed = rtrim($hello, "Hdle");
var_dump($trimmed);

// enlève les caractères de contrôle ASCII à la fin de $binary
// (de 0 à 31 inclusif)
$clean = rtrim($binary, "\x00..\x1F");
var_dump($clean);

?>

L'exemple ci-dessus va afficher :

string(32) "        Voici quelques mots :) ...  "
string(16) "    Exemple de chaîne
"
string(11) "Bonjour le monde !"

string(30) "        Voici quelques mots :) ..."
string(26) "        Voici quelques mots :)"
string(9) "Hello Wor"
string(15) "    Exemple de chaîne"

Note: Le second paramètre a été ajouté en PHP 4.1.0.

Voir aussi trim() et ltrim().

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quotemeta

Last updated: Fri, 11 Apr 2008

add a note User Contributed Notes
rtrim

harmor
05-Apr-2008 01:05


I'm sure there's a better way to strip strings from the end of strings.



/**

 * Strip a string from the end of a string

 *

 * @param string $str      the input string

 * @param string $remove   OPTIONAL string to remove

 *  

 * @return string the modified string

  */

function rstrtrim($str, $remove=null)

{

    $str    = (string)$str;

    $remove = (string)$remove;    

    

    if(empty($remove))

    {

        return rtrim($str);

    }

    

    $len = strlen($remove);

    $offset = strlen($str)-$len;

    while($offset > 0 && $offset == strpos($str, $remove, $offset))

    {

        $str = substr($str, 0, $offset);

        $offset = strlen($str)-$len;

    }

    

    return rtrim($str);    

    

} //End of function rstrtrim($str, $remove=null)



echo rstrtrim('Hello World!!!', '!')   .'<br />'; //"Hello World"

echo rstrtrim('Hello World!!!', '!!')  .'<br />'; //"Hello World!"

echo rstrtrim('Hello World!!!', '!!!') .'<br />'; //"Hello World"

echo rstrtrim('Hello World!!!', '!!!!').'<br />'; //"Hello World!!!"

YAS
08-May-2006 03:01


To remove an unwanted character - example "." - if exist or not.



The example above doesn't include the case where there is no "."

If there is not "." at the example above the last word will be deleted.



Have fun with this code.



<?php

$text = "This string contains. some unwanted characters on the end .";

$text = trim($text);

$last = $text{strlen($text)-1};

if (!strcmp($last,"."))

{

  $text = rtrim($text, 'a..z');

  $text = rtrim($text, '.');

}

?>

gbelanger at exosecurity dot com
17-Feb-2006 11:31


True, the Perl chomp() will only trim newline characters. There is, however, the Perl chop() function which is pretty much identical to the PHP rtrim()



---



Here's a quick way to recursively trim every element of an array, useful after the file() function :



# Reads /etc/passwd file an trims newlines on each entry

$aFileContent = file("/etc/passwd");

foreach ($aFileContent as $sKey => $sValue) {

    $aFileContent[$sKey] = rtrim($sValue);

}



print_r($aFileContent);

Unimagined at UnaimaginedDesigns dot Com
16-Jan-2005 09:49


I needed a way to trim all white space and then a few chosen strings from the end of a string.  So I wrote this class to reuse when stuff needs to be trimmed.  



<?php



class cleaner {



function cleaner ($cuts,$pinfo) {

$ucut = "0";

$lcut = "0";

while ($cuts[$ucut]) {

$lcut++;

$ucut++;

}

$lcut = $lcut - 1;

$ucut = "0";

$rcut = "0";

$wiy = "start";



while ($wiy) {



if ($so) {

$ucut = "0";

$rcut = "0";

unset($so);

}



if (!$cuts[$ucut]) {

$so = "restart";

} else {

$pinfo = rtrim($pinfo);

$bpinfol = strlen($pinfo);

$tcut = $cuts[$ucut];

$pinfo = rtrim($pinfo,"$tcut");

$pinfol = strlen($pinfo);



    if ($bpinfol == $pinfol) {

    $rcut++;

    if ($rcut == $lcut) {

    unset($wiy);

    }

    $ucut++;

    } else {

    $so = "restart";

    }

}

}



$this->cleaner = $pinfo;

}



}



$pinfo = "Well... I'm really bored...<br /><br>&nbsp;    \n\t&nbsp;<br><br /><br>&nbsp;    \r\r&nbsp;<br>\r<br /><br>\r&nbsp;    &nbsp;\n<br>      <br />\t";



$cuts = array('\n','\r','\t',' ',' ','&nbsp;','<br />','<br>','<br/>');



$pinfo = new cleaner($cuts,$pinfo);

$pinfo = $pinfo->cleaner;



print $pinfo;



?>



That class will take any string that you put in the $cust array and remove it from the end of the $pinfo string.  It's useful for cleaning up comments, articles, or mail that users post to your site, making it so there's no extra blank space or blank lines.

todd at magnifisites dot com
20-Aug-2003 03:19


This shows how rtrim works when using the optional charlist parameter:

rtrim reads a character, one at a time, from the optional charlist parameter and compares it to the end of the str string. If the characters match, it trims it off and starts over again, looking at the "new" last character in the str string and compares it to the first character in the charlist again. If the characters do not match, it moves to the next character in the charlist parameter comparing once again. It continues until the charlist parameter has been completely processed, one at a time, and the str string no longer contains any matches. The newly "rtrimmed" string is returned.

<?php

  // Example 1:

  rtrim('This is a short short sentence', 'short sentence');

  // returns 'This is a'

  // If you were expecting the result to be 'This is a short ',

  // then you're wrong; the exact string, 'short sentence',

  // isn't matched.  Remember, character-by-character comparison!

  // Example 2:

  rtrim('This is a short short sentence', 'cents');

  // returns 'This is a short short '

?>

HW
06-Jun-2003 03:32


$text = "This string contains some unwanted characters on the end.";

$text1 = rtrim($text, 'a..z');

$text1 = rtrim($text1, '.');

echo $text1; // only the '.' is trimmed.

$text2 = rtrim($text, 'a..z.');

echo $text2; // The whole last word is trimmed.

icon-phpnet at phy dot duke dot edu
01-Apr-2002 08:00


Not entirely. Perl's "chomp" will only remove the newline character, while rtrim without the second parameter will remove ALL whitespace. E.g. chomp("blah \n") will return "blah ", while rtrim("blah \n") will return "blah".

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Last updated: Fri, 11 Apr 2008