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str_rot13> <str_repeat
Last updated: Fri, 18 Jul 2008

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str_replace

(PHP 4, PHP 5)

str_replace — Sostituisce tutte le occorrenze della stringa cercata con la stringa di sostituzione

Descrizione

mixed str_replace ( mixed $search , mixed $replace , mixed $subject [, int &$count ] )

Questa funzione restituisce una stringa, od una matrice, con tutte le occorrenze di search nella stringa subject sostituite con il valore del parametro replace . Se non occorrono particolari capacità di sostituzione (tipo le espressioni regolari), si dovrebbe utilizzare questa funzione invece di ereg_replace() o preg_replace().

Dal PHP 4.0.5, ogni parametro di str_replace() può essere una matrice.

Avviso

Nelle versioni di PHP antecedenti la 4.3.3 esisteva un errore quando si utilizzano le matrici per search e replace che faceva ignorare gli indici vuoti di search avanzando il puntatore interno di replace , questo è stato corretto dal PHP 4.3.3, ogni script che si basava su questo errore, per potere simulare il comportamento originale, dovrebbe rimuovere gli elementi vuoti prima di richiamare questa funzione.

Se subject è una matrice, allora la ricerca e la sostituzione sono eseguite su ogni elemento di subject , ed il valore restituito è pure una matrice.

Se search e replace sono matrici, allora str_replace() prende i valori da ciascuna matrice e li usa per svolgere la ricerca e la sostituzione in subject . Se replace ha meno valori di search , allora si utilizzeranno delle stringhe vuote per completare i rimanenti valori da sostituire. Se search è una matrice e replace è una stringa, allora questa stringa di sostituzione sarà utilizzata per ogni valore di search . Il contrario non avrebbe senso.

Example #1 Esempi di uso di str_replace()

<?php
// Provides: <body text='black'>
$bodytag str_replace("%body%""black""<body text='%body%'>");

// Provides: Hll Wrld f PHP
$vowels = array("a""e""i""o""u""A""E""I""O""U");
$onlyconsonants str_replace($vowels"""Hello World of PHP");

// Provides: You should eat pizza, beer, and ice cream every day
$phrase  "You should eat fruits, vegetables, and fiber every day.";
$healthy = array("fruits""vegetables""fiber");
$yummy   = array("pizza""beer""ice cream");

$newphrase str_replace($healthy$yummy$phrase);

// Use of the count parameter is available as of PHP 5.0.0
$str str_replace("ll""""good golly miss molly!"$count);
echo 
$count// 2
?>

Nota: Questa funzione è binary-safe (gestisce correttamente i file binari)

Nota: Dal PHP 5.0.0 il numero di stringhe trovate e e sostituite, sarà restituito nel parametro, passato per riferimento, count . Nelle versioni antecedenti al PHP 5.0.0 questo parametro non è disponibile.

Vedere anche: str_ireplace(), substr_replace(), ereg_replace(), preg_replace() e strtr().



str_rot13> <str_repeat
Last updated: Fri, 18 Jul 2008
 
add a note add a note User Contributed Notes
str_replace
Daniel Vidal
07-Dec-2008 04:48
Substituindo caracteres acentuados em uma string (português)

If you need change portugues chars to ansi chars, try this

$com_acentos=array(
    "á","Á","ã","Ã",
    "â","Â","à","À",
    "é","É","ê","Ê",
    "í","Í","ó","Ó",
    "õ","Õ","ô","Ô",
    "ú","Ú","ü","Ü",
    "ç","Ç");
$sem_acentos=array(
    "a","A","a","A",
    "a","A","a","A",
    "e","E","e","E",
    "i","I","o","O",
    "o","O","o","O",
    "u","U","u","U",
    "c","C");

$input_string  = 'Ações em Alta. Série positiva:[áéíóúÁÉÍÓÚçÇ]';
$output_string = str_replace($com_acentos,$sem_acentos,$input_string);

echo 'input_string : ' . $input_string  . " <br />\n";
echo 'output_string: ' . $output_string . " <br />\n";

-------------------
Your will get:

input_string : Ações em Alta. Série positiva:[áéíóúÁÉÍÓÚçÇ]
output_string: Acoes em Alta. Serie positiva:[aeiouAEIOUcC]
gabriel dot totoliciu at ddnet dot ro
06-Dec-2008 07:30
As 'max at efoxdesigns dot com' said, when you try to replace a string that occurs in the $search array after the same character occurs in the $replace character, you don't usually get what you want.

examples:

<?php
$search
=array("beer", "graffiti", "programming");
$replace=array("graffiti", "motorcycles", "chips");
$string="I like beer, graffiti and programming.";

var_dump(str_replace($search, $replace, $string));
// you would expect to see:
// string(39) "I like graffiti, motorcycles and chips."

// well.. what you actually see is:
// string(42) "I like motorcycles, motorcycles and chips."

?>

I've made a function (stru_replace) that replaces everything correctly. It has some downsides, as it does not implement all the functionality of str_replace:

<?php
$search
=array("beer", "graffiti", "programming");
$replace=array("graffiti", "motorcycles", "chips");
$string="I like beer, graffiti and programming.";

var_dump(str_replace($search, $replace, $string));
//string(39) "I like graffiti, motorcycles and chips."
?>

I'm sure that the functions can be improved. Anyway, I guess they are a bit useful :D

<?php
//returns the key of the minimum value within the array
function minkey($array)
{
$first=true;
$mkey=false;
$mvalue=false;

foreach(
$array as $key=>$value)
    {
    if (
is_numeric($value))
        {
        if (
$mvalue>$value || $first)
            {
           
$mvalue=$value;
           
$mkey=$key;
            if (
$first) $first=false;
            }
        }
    }
   
return
$mkey;
}

//returns the key and the position of the first needle found withing the (string)haystack
function strposfirst($haystack, $needles, $currentpos=0)
{
$positions=array();
foreach(
$needles as $key=>$value)
   
$positions[$key]=strpos($haystack,$value,$currentpos);

$minkey=minkey($positions);
if (
$minkey===false) return array(false, false);
return array(
$minkey, $positions[$minkey]);
}

//third parameter must be a string
function stru_replace($search, $replace, $string)
{
$newString="";

// the function only implements functionality for the $search and $replace parameters
// as arrays that have the same ammount of elements
if (is_array($search) && is_array($replace))
    {
    if (
count($search)!=count($replace))
        throw new
ErrorException("The \$search and \$replace parameters must have the same number of elements");

   
$oCPos=0; // current position inside old string
   
$done=false; // determines when we searched all the string
   
   
while(!$done)
        {
       
//get the key and position of the first found element
       
list($key, $position)=strposfirst($string, $search, $oCPos);
       
       
//if there is a found element, get concatenate the string before it, and replace the string
       
if ($position!==false)
            {
           
// the string before the needle is concatenated in the new string
           
$newString.=substr($string, $oCPos, $position-$oCPos);
           
           
// the needle is replaced
           
$newString.=$replace[$key];
           
           
//add the with of the length of the string before the needle + the length of the new key
           
$oCPos+=$position-$oCPos+strlen($search[$key]);
            }
       
//set the done flag when nothing is found (position is false)
       
else $done=true;
        }
   
   
//concatenate the string after the last needle
   
$newString.=substr($string, $oCPos);
    return
$newString;
    }
else return
str_replace($search, $replace, $string);
}
?>

I hope this helps :)
If I'll change the functions, you'll find them here
http://pb.dev.ddnet.ro/phpLecture/issue1.php
nospam at nospam dot com
02-Dec-2008 02:55
Replacement for str_replace in which a multiarray of numerically keyed data can be properly evaluated with the given template without having a search for 11 be mistaken for two 1's next to each other

<?php

function data_template($input, $template) {
  if (
$template) { // template string
   
if ($split = str_split($template)) { // each char as array member
     
foreach ($split as $char) { // each character
       
if (is_numeric($char)) { // test for digit
         
if ($s != 1) { // new digit sequence
           
$i++;
           
$s = 1;
          }
         
$digits[$i] .= $char; // store digit
       
} else { // not a digit
         
if ($s != 2) { // new non-digit sequence
           
$i++;
           
$s = 2;
          }
         
$strings[$i] .= $char; // store string
       
}
      }
      if (
$i && $input && is_array($input)) { // input data
       
foreach ($input as $sub) { // each subarray
         
if (is_array($sub)) {
           
$out = ''; // reset output
           
for ($j = 0; $j <= $i; $j++) { // each number/string member
             
if ($number = $digits[$j]) { // number
               
$out .= $sub[$number]; // add value from subarray to output
             
} else { // string
               
$out .= $strings[$j]; // add to output
             
}
            }
           
$a[] = $out;
          }
        }
        return
$a;
      }
// input
   
} // split
 
} // template
}

$input = array(array(1=>'yellow', 2=>'banana', 11=>'fruit'), array(1=>'green', 2=>'spinach', 11=>'vegetable'), array(1=>'pink', 2=>'salmon', 11=>'fish'));

print_r (data_template($input, '2: a 1, healthy 11'));

/*
Array
(
    [0] => banana: a yellow, healthy fruit
    [1] => spinach: a green, healthy vegetable
    [2] => salmon: a pink, healthy fish
)
*/

// str_replace would have wanted to output 'banana: a yellow, healthy yellowyellow

?>

Not sure if this will help anyone but I wrote it for my application and thought I would share just in case
Konstantin
29-Oct-2008 04:01
Well, suffering without parameter replace ability like in plsql
sql = > "select * from x where id = %1";
execute sql, var1;
(sorry for pseudo)

here is a function just wrote for my self using str_replace, let me know if there is a better way for such generic function

<?php
function sql_prep()
{
       
$args = func_get_args();
       
$sql = array_shift($args);
       
$args_cnt = func_num_args();
       
$found=0;
        foreach(
$args as $key=>$value)
        {
               
$rep_str "\$sql = str_replace('%$key','$value',\$sql,\$count);";
                eval(
$rep_str);
                if(
$count)
                {
                       
$found++;
                }
        }
        if(
$found == $args_cnt-1)
        {
                return
$sql;
        }
        else
        {
                echo
"WARNING: number of subs=".($args_cnt-1)." does not match number of reps=$found";
                return
$sql;
        }
}
?>
tchapin at gmail dot com
15-Oct-2008 11:42
<?php

   
// Function used to "Genderize" a phrase, replacing "[he]" with "she", if gender is female,
    // and "[he]" with "he" if gender is male, and "[she]" with "he" if gender is male, etc...
   
function GenderizePhrase($Phrase='', $Gender="male"){
       
$SearchValues = array(
           
"[He]",
           
"[he]",
           
"[He's]",
           
"[he's]",
           
"[She]",
           
"[she]",
           
"[She's]",
           
"[she's]",
           
"[Him]",
           
"[him]",
           
"[Her]",
           
"[her]",
           
"[His]",
           
"[his]",
           
"[Hers]",
           
"[hers]",
           
"[Her's]",
           
"[her's]",
           
"[Himself]",
           
"[himself]",
           
"[Herself]",
           
"[Herself]"
       
);
        if(
$Gender=="Male" ||$Gender=="male" || $Gender == 1){
           
// Replace phrase pieces with male versions
           
$ReplacementValues = array(
               
"He",
               
"he",
               
"He's",
               
"he's",
               
"He",
               
"he",
               
"He's",
               
"he's",
               
"Him",
               
"him",
               
"His",
               
"his",
               
"His",
               
"his",
               
"His",
               
"his",
               
"His",
               
"his",
               
"Himself",
               
"himself",
               
"Himself",
               
"himself"
           
);
        }else{
           
// Replace phrase pieces with female versions
           
$ReplacementValues = array(
               
"She",
               
"she",
               
"She's",
               
"she's",
               
"She",
               
"she",
               
"She's",
               
"she's",
               
"Her",
               
"her",
               
"Her",
               
"her",
               
"Hers",
               
"hers",
               
"Hers",
               
"hers",
               
"Her's",
               
"her's",
               
"Herself",
               
"herself",
               
"Herself",
               
"Herself"
           
);
        }
        return
str_replace($SearchValues, $ReplacementValues, $Phrase);
    }

?>
lewdew at lycos dot co dot kr(LEE, EUN WOO)
15-Oct-2008 10:49
This function is made in order to slove the problem when using conventional str_replace built-in function when inserting tags in normal string.

<?php
$what
: string to be matched wholly
$where
: string to be searched in
$tag_open
: opening tag string such as <font color=#123456>
$tag_close : closing tag string such as </font>

function
str_html_addtag($what, $where, $tag_open, $tag_close)
{
   
$array_pos_begin = array();
   
$array_pos_end = array();
    for(
$cnt=0; $cnt<sizeof($what); $cnt++)
    {
       
$pos = 0;
       
$pos_start = $pos;
        while(
$pos = stripos($where, $what[$cnt], $pos))//stripos - case-insensitive search
      
{
           if(
is_false($pos)) break;
          
array_push($array_pos_begin, $pos);
          
array_push($array_pos_end, $pos+strlen($what[$cnt]));
           if(
sizeof($array_pos_begin)>10) break;
          
$pos++;
       }
    }
   
array_multisort($array_pos_begin, $array_pos_end);
    for(
$i=0; $i<sizeof($array_pos_begin)-1; $i++)
    {
        if(
$array_pos_end[$i]>=$array_pos_begin[$i+1])
        {
   
$array_pos_end[$i] = max($array_pos_end[$i], $array_pos_end[$i+1]);
   
array_splice($array_pos_begin, $i+1, -(sizeof($array_pos_begin)-($i+2)));
   
array_splice($array_pos_end, $i+1, -(sizeof($array_pos_end)-($i+2)));
   
$i--;
        }
    }
    for(
$i=sizeof($array_pos_begin)-1; $i>=0; $i--)
    {
       
$head = substr($where, 0, $array_pos_end[$i]);
       
$tail = substr($where, $array_pos_end[$i]);
       
$where = $head.$tag_close.$tail;

       
$head = substr($where, 0, $array_pos_begin[$i]);
       
$tail = substr($where, $array_pos_begin[$i]);
       
$where = $head.$tag_open.$tail;
    }
    return
$where;
}
?>
nick at NOSPAM dot pitchinteractive dot com
06-Oct-2008 04:12
I tried max at efoxdesigns dot com solution for str_replace_once but it didn't work quite right so I came up with this solution (all params must be strings):

<?php
function str_replace_once($search, $replace, $subject) {
   
$firstChar = strpos($subject, $search);
    if(
$firstChar !== false) {
       
$beforeStr = substr($subject,0,$firstChar);
       
$afterStr = substr($subject, $firstChar + strlen($search));
        return
$beforeStr.$replace.$afterStr;
    } else {
        return
$subject;
    }
}
?>
Mohammad Dayyan
24-Sep-2008 07:19
Changing English number with Persian number

<?php
function farsi_number($input)
{
 
$englishNumber=
       array(
"0","1","2","3","4","5","6","7","8","9");
 
$persianNumber=
       array(
"۰","۱","۲","۳","۴","۵","۶","۷","۸","۹");
  return
str_replace($englishNumber,
      
$persianNumber, $input);
}
?>
paolo A T doppioclick D O T com
05-Sep-2008 04:15
For PHP 4 < 4.4.5 and PHP 5 < 5.2.1 you may occur (like me) in this bug:

http://www.php-security.org/MOPB/MOPB-39-2007.html
marco dot carvalho at onda dot com dot br
29-Aug-2008 11:54
If you need to replace áóíóú and other special char, you need encondig type suport.

For this, just use htmlentities and some regular expressions

<?PHP

function RemoveAcentos($str, $enc = "UTF-8"){

$acentos = array(
   
'A' => '/&Agrave;|&Aacute;|&Acirc;|&Atilde;|&Auml;|&Aring;/',
   
'a' => '/&agrave;|&aacute;|&acirc;|&atilde;|&auml;|&aring;/',
   
'C' => '/&Ccedil;/',
   
'c' => '/&ccedil;/',
   
'E' => '/&Egrave;|&Eacute;|&Ecirc;|&Euml;/',
   
'e' => '/&egrave;|&eacute;|&ecirc;|&euml;/',
   
'I' => '/&Igrave;|&Iacute;|&Icirc;|&Iuml;/',
   
'i' => '/&igrave;|&iacute;|&icirc;|&iuml;/',
   
'N' => '/&Ntilde;/',
   
'n' => '/&ntilde;/',
   
'O' => '/&Ograve;|&Oacute;|&Ocirc;|&Otilde;|&Ouml;/',
   
'o' => '/&ograve;|&oacute;|&ocirc;|&otilde;|&ouml;/',
   
'U' => '/&Ugrave;|&Uacute;|&Ucirc;|&Uuml;/',
   
'u' => '/&ugrave;|&uacute;|&ucirc;|&uuml;/',
   
'Y' => '/&Yacute;/',
   
'y' => '/&yacute;|&yuml;/',
   
'a.' => '/&ordf;/',
   
'o.' => '/&ordm;/'
);

return
preg_replace($acentos, array_keys($acentos), htmlentities($str,ENT_NOQUOTES, $enc));

}
?>
max at efoxdesigns dot com
06-Aug-2008 01:13
I'm sorry.  I can't believe it: I messed up again.  Something that I forgot is that the php empty() function considers the number zero (0) as an empty value.  Therefore, we need to change our if statement to the following:
<?php
if ($i[0] !== null) $subject .= $replace[$i[0]];
?>
If we left it how it was, the replace ignores the first element of the arrays. ($array[0])

The reason that I used !empty() before, is that I wasn't sure what array_keys() returns if the element is not found (null? and empty string?), since both null and the empty string print out the same and I couldn't find what it returned in this case, in the manual.

The final, working function would look like:
<?php
function str_replace_once($search, $replace, $subject) {
   
$newArr = str_split($subject);
   
$subject = '';
    foreach (
$newArr as $nchar)
    {
       
$i = array_keys($search, $nchar);
        if (
$i[0] !== null) $subject .= $replace[$i[0]];
        else
$subject .= $nchar;
    }
    return
$subject;
}
?>
max at efoxdesigns dot com
06-Aug-2008 12:28
Sorry, folks. That last note I put up won't work quite correctly. Unlike str_replace(), that snippet I showed you will replace any characters that aren't in your $search array with an empty string.
To correct this behavior, add this check to the foreach loop:
<?php
   
//...
   
if (!empty($i[0])) $subject .= $replace[$i[0]];
    else
$subject .= $nchar; //now, if the search character isn't found (ie, we don't care about it), it will stay the same, instead of getting replaced by an empty string.
?>
The whole thing would look like the following, if you were to put it into a function:
<?php
function char_replace_once($search, $replace, $subject) {
   
$newArr = str_split($subject);
   
$subject = '';
    foreach (
$newArr as $nchar)
    {
       
$i = array_keys($search, $nchar);
        if (!empty(
$i[0])) $subject .= $replace[$i[0]];
        else
$subject .= $nchar;
    }
    return
$subject;
}
?>
I'm sure it may not be as efficient as str_replace(), but it successfully replaces characters, correctly.

ONE OTHER IMPORTANT THING TO NOTE: Unlike I said before, this will only work for character replacement - not string replacement. The reason, of course, is that the original string gets split into an array, who's members are only one character. Sorry about that.
That drawback aside, though, this is still a useful function for doing complete, accurate character replacement.
max at efoxdesigns dot com
06-Aug-2008 11:29
Note that the str_replace() function is recursive. This is not usually a problem, unless you are trying to do a replace in which a character or string occurs in the $search array, after the same character or string occurs in the $replace array. (For instance, imagine doing a global character replace.)
To demonstrate, take a look at the folowing:
<?php
$search
= array('q','w','e','r','t','y','u');
$replace = array('z','s','d','e','y','f','g');
$mystring = 'qwertyu';

//Outputs: zsdeffg
echo str_replace($search, $replace, $mystring);
?>
As you would expect, the q gets replaced by a z, the w by an s, and so on. Everything is correct, except that the t doesn't seem to have been replaced by a y. This is not entirely true, however. What happened is that it did, indeed get replaced by a y, but then on the next pass of the str_replace() function, str_replace() found a y and replaced it with an f.

To get this to work as we'd like (every letter in the $search array replaced by the cooresponding spot in the $replace array), we can do something like the following:
<?php
$search
= array('q','w','e','r','t','y','u');
$replace = array('z','s','d','e','y','f','g');
$mystring = 'qwertyu';

//Outputs: zsdeffg (Not what we wanted.)
echo str_replace($search, $replace, $mystring);

$newArr = str_split($mystring); //split $mystring into an array of characters. For php4, you'll have to create the str_split() function.
$newstring = '';
foreach (
$newArr as $nchar)
{
   
$i = array_keys($replace, $nchar); //get the key(s) in the $search array for the character we're replacing. (we assume it occurs only once.) Returns an array of length, 1.
   
$newstring .= $replace[$i[0]]; //find the character in the $replace array that matches the position of the one we're replacing, and add it to $newstring.
}

//Outputs: zsdeyfg
echo $newstring;
?>
This time, as you can see, there is a y in place of the t, which was what we wanted. :)
Hope that clears up any confusion for anyone wondering why their strings aren't getting replaced as they'd expect.
troy at troyonline dot com
22-Jun-2008 10:18
Yet another deep replace function:

<?php
   
function str_replace_deep( $search, $replace, $subject)
    {
       
$subject = str_replace( $search, $replace, $subject);

        foreach (
$subject as &$value)
           
is_array( $value) and $value =str_replace_deep( $search, $replace, $value);
           
        return
$subject;
    }
?>
jaimthorn at yahoo dot com
20-Jun-2008 04:52
On the 19th of June, 2008, max at bitsonnet dot com posted a function interpolate that used create_function. I'd never seen create_function before and I thought it was very educational.  Thanks, Maxim!

However, the interpolate function can be improved, speed-wise:

<?php

function interpolate2($template, $hash, $prefix = '#{', $postfix = '}')
{
   
$tmp = array();
    foreach(
$hash as $k => $v)
    {
       
$tmp[$prefix . $k . $postfix] = $v;
    }

    return
str_replace(array_keys($tmp), array_values($tmp), $template);
}

echo
interpolate2('Hello, #{username}. Welcome to #{site}.', array('username' => 'World', 'site' => 'php.net'));

?>

According to my own tests, this version is somewhere between 4 and 5 times faster.

Note, btw, that I used a very similar function on the sprintf page.
max at bitsonnet dot com
19-Jun-2008 02:00
I always miss interpolate functionality in PHP, so I wrote this little helper method. It allows you to specify your own markup using $prefix and $postfix.

<?php

#  Interpolate a string using hash.
#  by Maxim Chernyak ( http://mediumexposure.com )

function interpolate($template, $hash, $prefix = '#{', $postfix = '}' ) {
   
$tokenize = create_function('$token', 'return "'. $prefix .'".$token."'.$postfix.'";');
   
$keys = array_keys($hash);
   
$values = array_values($hash);
   
$keys = array_map($tokenize, $keys);
       
    return
str_replace($keys, $values, $template);
}

?>

For example:

<?php
    $result
= interpolate('Hello, #{username}. Welcome to #{site}.', array('username' => 'Hakunin', 'site' => 'php.net'));
?>
cclarkson at htcomp dot net
27-Apr-2008 03:32
The example presented by bladescope at googlemail dot com has a couple of syntax errors. This works:

<?php
    $template
= "The {color} {object} is in {location}";
   
$array = array(
       
'{object}'    => 'Ball',
       
'{color}'     => 'Red',
       
'{location}'  => 'The Playground',
    );
    foreach (
$array as $search => $replace) {
       
$template = str_replace($search, $replace, $template);
    }
    print
$template;
?>

I did not check it for speed or thoroughly test it, but this function seems to do the same thing more succinctly.

<?php
   
function template($array, $template) {
        return
str_replace(
           
array_keys($array),
           
array_values($array),
           
$template
       
);
    }

    echo
template(
         array(
           
'{color}'     => 'red',
           
'{object}'    => 'ball',
           
'{location}'  => 'the playground',
        ),
       
'The {color} {object} is in {location}.'
   
);
?>
David Gimeno i Ayuso (info at sima dot cat)
09-Aug-2007 12:50
This is the functions I wrote for the problem reported above, str_replace in multi-dimensional arrays. It can work with preg_replace as well.

<?php
function array_replace($SEARCH,$REPLACE,$INPUT) {
  if (
is_array($INPUT) and count($INPUT)<>count($INPUT,1)):
    foreach(
$INPUT as $FAN):
     
$OUTPUT[]=array_replace($SEARCH,$REPLACE,$FAN);
    endforeach;
  else:
   
$OUTPUT=str_replace($SEARCH,$REPLACE,$INPUT);
  endif;
  return
$OUTPUT;
}
?>
David Gimeno i Ayuso (info at sima dot cat)
09-Aug-2007 12:22
With PHP 4.3.1, at least, str_replace works fine when working with single arrays but mess it all with two or more dimension arrays.

<?php
$subject
= array("You should eat this","this","and this every day.");
$search  = "this";
$replace = "that";
$new     = str_replace($search, $replace, $subject);

print_r($new); // Array ( [0] => You should eat that [1] => that [2] => and that every day. )

echo "<hr />";

$subject = array(array("first", "You should eat this")
                ,array(
"second","this")
                ,array(
"third", "and this every day."));
$search  = "this";
$replace = "that";
$new     = str_replace($search, $replace, $subject);

print_r($new); // Array ( [0] => Array [1] => Array [2] => Array )

?>
mjaque at ilkebenson dot com
22-Jul-2007 01:28
In order to replace carriage return characters from form inputs, if everything else fails, you can try:

<?php
$new_text
= str_replace(chr(13).chr(10), '_', $original_text);
?>

And in order to show the line feeds in a javascript alert, you can do:

<?php
$new_text
= str_replace(chr(13).chr(10), '\n', $original_text);
?>
cm at k-a-p dot com
12-Jun-2007 06:47
Here is a version that allows for empty multidimensional arrays:

<?php
function str_replace_array ($search, $replace, $subject) {
    if (
is_array($subject)) {
        foreach (
$subject as $id=>$inner_subject) {
           
$subject[$id]=str_replace_array($search, $replace, $inner_subject);
        }
    } else {
       
$subject=str_replace($search, $replace, $subject);
    }
    return
$subject;
}
?>
tim at hysniu dot com
05-Jun-2007 11:27
I found that having UTF-8 strings in as argument didnt
work for me using heavyraptors function.
Adding UTF-8 as argument on htmlentities
fixed the problem.

cheers, tim at hysniu.com

<?php
function replace_accents($str) {
 
$str = htmlentities($str, ENT_COMPAT, "UTF-8");
 
$str = preg_replace(
'/&([a-zA-Z])(uml|acute|grave|circ|tilde);/',
'$1',$str);
  return
html_entity_decode($str);
}

?>
kole
25-Feb-2007 05:48
My input is MS Excel file but I want to save ‘,’,“,” as ',',",".

    $badchr        = array(
        "\xc2", // prefix 1
        "\x80", // prefix 2
        "\x98", // single quote opening
        "\x99", // single quote closing
        "\x8c", // double quote opening
        "\x9d"  // double quote closing
    );
       
    $goodchr    = array('', '', '\'', '\'', '"', '"');
       
    str_replace($badchr, $goodchr, $strFromExcelFile);

Works for me.
rlee0001 at sbcglobal dot net
16-Feb-2007 12:30
This is a more rigid alternative to spectrereturns at creaturestoke dot com's replace_different function:

<?php

       
function str_replace_many ($search, $replacements, $subject) {
           
$index = strlen($subject);
           
$replacements = array_reverse($replacements);

            if (
count($replacements) != substr_count($subject, $search)) {
                return
FALSE;
            }

            foreach (
$replacements as $replacement) {
               
$index = strrpos(substr($subject, 0, $index), $search);
               
$prefix = substr($subject, 0, $index);
               
$suffix = substr($subject, $index + 1);
               
$subject = $prefix . $replacement . $suffix;
            }

            return
$subject;
        }
?>

This will return false if there are a different number of $replacements versus number of occurrences of $search in $subject. Additionally, $search much be exactly one character (if a string is provided, only the first character in the string will be used). Examples:

<?php
       
echo str_replace_many('?',array('Jane','banana'),'? is eating a ?.');
?>

prints: "Jane is eating a banana."
15-Jan-2007 01:42
Before spending hours searching your application why it makes UTF-8 encoding into some malformed something with str_replace, make sure you save your PHP file in UTF-8 (NO BOM).

This was at least one of my problems.
Boris DOT Christ AT laposte DOT net
27-Nov-2006 01:32
I create a little function to transform (to example) "User@example.net" in "user AT example DOT net" and conversely.

<?php
function code_mail($email) {
    if(
preg_match('`^.+@.+\..{1,5}$`', $email)) { //email format
       
$email = str_replace('.', ' DOT ', $email); //replace . by dot
       
$email = str_replace('@', ' AT ', $email); //replace @ by at
       
return $email;
    }       
    else {
//not email format
       
return false;
    }
}
function
decode_mail($email) { //on décode...
   
$email = str_replace(' DOT ', '.', $email); //replace dot by .