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str_replace

(PHP 4, PHP 5, PHP 7)

str_replaceSubstitui todas as ocorrências da string de procura com a string de substituição

Descrição

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

Esta função retorna uma string ou um array com todas as ocorrências de search em subject substituídas com o valor dado para replace.

Se você não precisa de regras de substituição especiais (como expressões regulares), você sempre poderia usar esta função ao invés de ereg_replace() ou preg_replace().

Parâmetros

Se search e replace são arrays, então str_replace() pega o valor de cada array e os usa para fazer a pesquisa e a substituição em subject. Se replace tem menos valores do que search, então uma string vazia é usada para o restante dos valores de substituição. Se search é um array e replace é uma string, então esta string de substituição é usada para cada valor de search. O contrário não faria sentido, contudo.

Se search ou replace são arrays, seus elementos são processados do primeiro ao último.

search

replace

subject

Se subject é um array, então a pesquisa e a substituição é executada com cada entrada de subject, e o valor de retorno é um array também.

count

Nota: Se passado, guardará o número de combinações e modificações feitas.

Valor Retornado

Esta função retorna uma string ou um array com os valores modificados.

Changelog

Versão Descrição
5.0.0 O parâmetro count foi adicionado.
4.3.3 O comportamento desta função foi modificado. Em antigas versões um bug existia ao se usar arrays em ambos os parâmetros search e replace que causava índices de search vazios para serem pulados sem avançar o apontador interno no array replace. Isto foi corrigido no PHP 4.3.3, quaisquer scripts que contavam com este bug removeriam valores de pesquisa vazios anteriores à chamada desta função afim de imitar o comportamento original.
4.0.5 Mais parâmetros podem agora ser um array.

Exemplos

Exemplo #1 Exemplos da str_replace()

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

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

// Fornece: você comeria pizza, cerveja e sorvete todos os dias
$frase  "você comeria frutas, vegetais, e fibra todos os dias.";
$saudavel = array("frutas""vegetais""fibra");
$saboroso   = array("pizza""cerveja""sorvete");

$novafrase str_replace($saudavel$saboroso$frase);

// Uso do parâmetro count está disponível no PHP 5.0.0
$str str_replace("ll""""good golly miss molly!"$count);
echo 
$count// 2

// Order of replacement
$str     "Line 1\nLine 2\rLine 3\r\nLine 4\n";
$order   = array("\r\n""\n""\r");
$replace '<br />';
// Processes \r\n's first so they aren't converted twice.
$newstr str_replace($order$replace$str);

// Outputs: apearpearle pear
$letters = array('a''p');
$fruit   = array('apple''pear');
$text    'a p';
$output  str_replace($letters$fruit$text);
echo 
$output;
?>

Notas

Nota: Esta função é binary-safe.

Nota:

Esta função é case-sensitive. Use str_ireplace() para substituição case-insensitive.

Veja Também

  • str_ireplace() - Versão que não diferencia maiúsculas e minúsculas de str_replace.
  • substr_replace() - Substitui o texto dentro de uma parte de uma string
  • preg_replace() - Realiza uma pesquisa por uma expressão regular e a substitui.
  • strtr() - Traduz certos caracteres

add a note add a note

User Contributed Notes 46 notes

up
156
nikolaz dot tang at hotmail dot com
6 years ago
A faster way to replace the strings in multidimensional array is to json_encode() it, do the str_replace() and then json_decode() it, like this:

<?php
function str_replace_json($search, $replace, $subject){
     return
json_decode(str_replace($search, $replacejson_encode($subject)));

}
?>

This method is almost 3x faster (in 10000 runs.) than using recursive calling and looping method, and 10x simpler in coding.

Compared to:

<?php
function str_replace_deep($search, $replace, $subject)
{
    if (
is_array($subject))
    {
        foreach(
$subject as &$oneSubject)
           
$oneSubject = str_replace_deep($search, $replace, $oneSubject);
        unset(
$oneSubject);
        return
$subject;
    } else {
        return
str_replace($search, $replace, $subject);
    }
}
?>
up
27
Alberto Lepe
8 years ago
Be careful when replacing characters (or repeated patterns in the FROM and TO arrays):

For example:

<?php
$arrFrom
= array("1","2","3","B,);
"ht str-ireplace.php" class="functuByword">,"3","3","3","B,)ss="span>$oneSubject ,"B<>        return str_replace$replace$replace,"B,>}

For example:

<?php
$arrFrom
=lass="default"><?php
$} ,"3"<?php
$} ,"3"<?php
$} ,"3"<?php
$} ,"B,)ss="span>$oneSubject ,"B<>        rstr_replace,"3","B,>}
?>
5198
5198a href="/manual/vote-note.php?id=91536&page=function.str-replace&vote=up" title="Vote up!" class="usernotes-vot5198
5198a href="/manual/vote-note.php?id=91536&page=function.str-replace&vote=down" title="Vote down!" class="usernotes-voted">down 5198 iv> 5198 i
Alberto Lepe &p12-17 01:32v class="d7te" title="2009-06-15 07:44">8 years ago
nikolaz dot tang at hotmail dot com 1- &p26 11:20v class="date" title="2010-11-11 08:57">6 years ago nikolaz dot tang at hotmail dot com <> 5-04-03 01:25v class="d2te" title="2010-11-11 08:57">6 years ago />
752>a href="/manual/vote-note.php?id=91536&page=function.str-replace&vote=up" title="Vote up!" class="usernotes-vot752>
752>a href="/manual/vote-note.php?id=91536&page=function.str-replace&vote=down" title="Vote down!" class="usernotes-voted">down 752> iv> 752> i
nikolaz dot tang at hotmail dot com <> &p04-23 05:23v class="d7te" title="2009-06-15 07:44">8 years ago <>
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nikolaz dot tang at hotmail dot com 6-08p26 04:08v class="d1te" ttle="2010-11-11 08:57">6 years ago

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nikolaz dot tang at hotmail dot com 6-02-05 02:59v class="d1te" ttle="2010-11-11 08:57">6 years ago
s quAALLlaso ueterof itui o t,ss=ere'>no s quA>do;ubject// >;ubject// >?> /span>
nikolaz dot tang at hotmail dot com &pa1-29 06:38v class="date" title="2009-06-15 07:44">8 years ago
] atordefan/voted,">e> array is t ando
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2465 href="/manual/vote-note.php?id=100871&page=function.str-replace&vote=up" title="Vote up!" class="usernotes-vote2465 /a>
do)ukrong class="user">nikolaz dot tang at hotmail dot com 1- 2-16/a><16v class="date" title="2010-11-11 08:57">6 years ago
dfinn tunhtm ct un/vldyou to anyonchwsprwihhelatr malass=eir "Vo
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7574a href="/manual/vote-note.php?id=91536&page=function.str-replace&vote=down" title="Vote down!" class="usernotes-voted">down 7574 iv> <0v class="tally" id="V9871" title="76% like this..."> 7574 i<>
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18785 href="/manual/vote-note.php?id=100871&page=func5660n>tr-replace&vote=up" title="Vote up!" 5660ote" id="91536"d18785 /a>
1- 2-16/a>ttspan>7" title="2010-11-11 08:57">6 yeap;   breflne,For exaj Aject rs ag Aject , Aject , Aject , A)n class="'MIKE AND ERICA LIKE AMass="keyyse"oTs >en>st);st);g">"B);
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18785 href="/manual/vote-note.php?id=100871&page=fu6378an>tr-replace&vote=up" title="Vote up!6378aote" id="91536"d18785 /a>
<"gass="user">nikolaz dot tang at h6-03-30ot c40 1- 2-16/a>6378an>tss="date" title="2009-06-15 07:44">8 years:44efforn> ;Wclamcopypan>< aste smme&ntpl= s, I've>"B<>UTF8). A saneevio><* @

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2465 href="/manual/vote-note.php?id=100871&page=func9487n>tr-replace&vote=up" title="Vote up!" 9487ote" id="91536"d=2465 /a>
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