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str_ireplace

(PHP 5, PHP 7, PHP 8)

str_ireplaceVersión insensible a mayúsculas y minúsculas de str_replace()

Descripción

str_ireplace(
    mixed $search,
    mixed $replace,
    mixed $subject,
    int &$count = ?
): mixed

Esta función devuelve un string o un array con todas las apariciones de search en subject (ignorando mayúsculas y minúsculas) reemplazadas con el valor dado de replace. Si no se necesitan reglas complicadas de reemplazo, en general se puede utilizar esta función en lugar de preg_replace() con el modificador i.

Parámetros

Sisearch y replace son matrices, entonces str_ireplace() toma un valor de cada array y lo utiliza para buscar y reemplazar en subject. Si replace tiene menos valores que search, entonces un string vacío es usado para el resto de los valores de reemplazo. Si search es un array y replace es un string, entonces este string de reemplazo es usado para cada valor de search. Sin embargo, lo contrario no tendría sentido.

Si search o replace son arrays, sus elementos son procesados del primero al último.

search

El valor a ser buscado, también conocida como la aguja. Un array puede ser utilizado para designar varias agujas.

replace

El valor de reemplazo que sustituye los valores encontrados de search. Un array puede ser utilizado para designar reemplazos múltiples.

subject

El string o array sobre el que se busca y se sustituye, también conocido como el pajar.

Si subject es un array, entonces la búsqueda y reemplazo se realiza con cada entrada de subject y el valor devuelto también es un array.

count

Si es pasado, con éste parámetro se establece el número de reemplazos realizados.

Valores devueltos

Devuelve un string o un array de sustituciones.

Ejemplos

Ejemplo #1 Ejemplo de str_ireplace()

<?php
$bodytag
= str_ireplace("%body%", "black", "<body text=%BODY%>");
echo
$bodytag; // <body text=black>
?>

Notas

Nota: Esta función es segura binariamente.

Precaución

Trampa en que se puede caer por el orden de reemplazo

Debido a que str_ireplace() reemplaza de izquierda a derecha, podría sustituir a un valor previamente insertado cuando se hacen sustituciones múltiples. El ejemplo #2 en la documentación de str_replace() demuestra como esto puede afectar en la práctica.

Ver también

  • str_replace() - Reemplaza todas las apariciones del string buscado con el string de reemplazo
  • preg_replace() - Realiza una búsqueda y sustitución de una expresión regular
  • strtr() - Convierte caracteres o reemplaza substrings

add a note

User Contributed Notes 11 notes

up
27
sawdust
15 years ago
Here's a different approach to search result keyword highlighting that will match all keyword sub strings in a case insensitive manner and preserve case in the returned text. This solution first grabs all matches within $haystack in a case insensitive manner, and the secondly loops through each of those matched sub strings and applies a case sensitive replace in $haystack. This way each unique (in terms of case) instance of $needle is operated on individually allowing a case sensitive replace to be done in order to preserve the original case of each unique instance of $needle.

<?php
function highlightStr($haystack, $needle, $highlightColorValue) {
// return $haystack if there is no highlight color or strings given, nothing to do.
if (strlen($highlightColorValue) < 1 || strlen($haystack) < 1 || strlen($needle) < 1) {
return
$haystack;
}
preg_match_all("/$needle+/i", $haystack, $matches);
if (
is_array($matches[0]) && count($matches[0]) >= 1) {
foreach (
$matches[0] as $match) {
$haystack = str_replace($match, '<span style="background-color:'.$highlightColorValue.';">'.$match.'</span>', $haystack);
}
}
return
$haystack;
}
?>
up
16
daevid at daevid dot com
18 years ago
here's a neat little function I whipped up to do HTML color coding of SQL strings.

<?php
/**
* Output the HTML debugging string in color coded glory for a sql query
* This is very nice for being able to see many SQL queries
* @access public
* @return void. prints HTML color coded string of the input $query.
* @param string $query The SQL query to be executed.
* @author Daevid Vincent [daevid@LockdownNetworks.com]
* @version 1.0
* @date 04/05/05
* @todo highlight SQL functions.
*/
function SQL_DEBUG( $query )
{
if(
$query == '' ) return 0;

global
$SQL_INT;
if( !isset(
$SQL_INT) ) $SQL_INT = 0;

//[dv] this has to come first or you will have goofy results later.
$query = preg_replace("/['\"]([^'\"]*)['\"]/i", "'<FONT COLOR='#FF6600'>$1</FONT>'", $query, -1);

$query = str_ireplace(
array (
'*',
'SELECT ',
'UPDATE ',
'DELETE ',
'INSERT ',
'INTO',
'VALUES',
'FROM',
'LEFT',
'JOIN',
'WHERE',
'LIMIT',
'ORDER BY',
'AND',
'OR ', //[dv] note the space. otherwise you match to 'COLOR' ;-)
'DESC',
'ASC',
'ON '
),
array (
"<FONT COLOR='#FF6600'><B>*</B></FONT>",
"<FONT COLOR='#00AA00'><B>SELECT</B> </FONT>",
"<FONT COLOR='#00AA00'><B>UPDATE</B> </FONT>",
"<FONT COLOR='#00AA00'><B>DELETE</B> </FONT>",
"<FONT COLOR='#00AA00'><B>INSERT</B> </FONT>",
"<FONT COLOR='#00AA00'><B>INTO</B></FONT>",
"<FONT COLOR='#00AA00'><B>VALUES</B></FONT>",
"<FONT COLOR='#00AA00'><B>FROM</B></FONT>",
"<FONT COLOR='#00CC00'><B>LEFT</B></FONT>",
"<FONT COLOR='#00CC00'><B>JOIN</B></FONT>",
"<FONT COLOR='#00AA00'><B>WHERE</B></FONT>",
"<FONT COLOR='#AA0000'><B>LIMIT</B></FONT>",
"<FONT COLOR='#00AA00'><B>ORDER BY</B></FONT>",
"<FONT COLOR='#0000AA'><B>AND</B></FONT>",
"<FONT COLOR='#0000AA'><B>OR</B> </FONT>",
"<FONT COLOR='#0000AA'><B>DESC</B></FONT>",
"<FONT COLOR='#0000AA'><B>ASC</B></FONT>",
"<FONT COLOR='#00DD00'><B>ON</B> </FONT>"
),
$query
);

echo
"<FONT COLOR='#0000FF'><B>SQL[".$SQL_INT."]:</B> ".$query."<FONT COLOR='#FF0000'>;</FONT></FONT><BR>\n";

$SQL_INT++;

}
//SQL_DEBUG
?>
up
6
Anteaus
9 years ago
If you follow the instructions given here you will end up with code which works in php5.3 but which bugs-out in php5.4. Reason is that '&$count' (explicit pass by reference) is now an illegal construct.
Nasty, especially it leads to unreliable code which may work on test but not in production. Manual needs corrected!
up
4
stepanic dot matija at gmail dot com
13 years ago
FIX-ed problem with highlighting second 'o' OR 'a', in this string

<?php
function highlight_string ($haystack, $needle, $highlight_class) {
// return $haystack if there is no highlight color or strings given, nothing to do.

$first_encode='XXXXXXXXXXXXXXX'; //ENCODE string

$second_encode='YYYYYYYYYYYYYYY';

preg_match_all("/$needle+/i", $haystack, $matches);
if (
is_array($matches[0]) && count($matches[0]) >= 1) {
foreach (
$matches[0] as $match) {
$haystack = str_replace($match, $first_encode.$match.$second_encode, $haystack);
}
}

$haystack=str_replace(array($first_encode,$second_encode),
array(
'<font class="'.$highlight_class.'" >','</font>'),$haystack);

return
$haystack;
}
?>
up
4
Psudo - thepsudo at gmail dot com
12 years ago
For highlighting without the overhead of regex and without destroying capitalization, try this:

<?php
function highlight($needle, $haystack){
$ind = stripos($haystack, $needle);
$len = strlen($needle);
if(
$ind !== false){
return
substr($haystack, 0, $ind) . "<b>" . substr($haystack, $ind, $len) . "</b>" .
highlight($needle, substr($haystack, $ind + $len));
} else return
$haystack;
}
?>

This example uses HTML bold tags, but you can easily change the highlighting method.
up
3
aidan at php dot net
19 years ago
This functionality is now implemented in the PEAR package PHP_Compat.

More information about using this function without upgrading your version of PHP can be found on the below link:

http://pear.php.net/package/PHP_Compat
up
2
ishutko at gmail dot com
15 years ago
For function work with cirilic

setlocale (LC_ALL, 'ru_RU');
up
-2
hfuecks at nospam dot org
18 years ago
Note that character case is being defined by your server's locale setting, which effects strings containing non-ASCII characters.

See strtolower() - http://www.php.net/strtolower and comments - internally str_ireplace converts $search and $replace to lowercase to find matches.
up
-2
Michael dot Bond at mail dot wvu dot edu
15 years ago
This function will highlight search terms (Key Words in Context).

The difference between this one and the ones below is that it will preserve the original case of the search term as well. So, if you search for "american" but in the original string it is "American" it will retain the capital "A" as well as the correct case for the rest of the string.

<?php
function kwic($str1,$str2) {

$kwicLen = strlen($str1);

$kwicArray = array();
$pos = 0;
$count = 0;

while(
$pos !== FALSE) {
$pos = stripos($str2,$str1,$pos);
if(
$pos !== FALSE) {
$kwicArray[$count]['kwic'] = substr($str2,$pos,$kwicLen);
$kwicArray[$count++]['pos'] = $pos;
$pos++;
}
}

for(
$I=count($kwicArray)-1;$I>=0;$I--) {
$kwic = '<span class="kwic">'.$kwicArray[$I]['kwic'].'</span>';
$str2 = substr_replace($str2,$kwic,$kwicArray[$I]['pos'],$kwicLen);
}

return(
$str2);
}
?>
up
-5
holblin at holblin dot com
13 years ago
Warning with highlighting ...

I used :

<?php
$text
= preg_replace('/('.$q.')/i','<span class=highlighting "">$1</span>' , $text);
?>

Because this line do not allow to highlight uppercase and lowercase correctly (transform uppercase to lowercase for exemple)

<?php
$text
= str_ireplace( $q , '<span class=highlighting "">'.$q.'</span>', $text);
?>

But when $q contain some regex you have some problems ... for exemple :
<?php $q = '('; ?>

So you must use preg_replace to highlight correctly the text and you must create a function for escape bad regex caracters !

I think that a better function can be found but this works I guess :

<?php
function regex_escape( $q )
{
return
preg_replace('/([\[\]\(\)\{\}\-\.\*\?\|\^\$])/', '\$1', $q);
}
?>
up
-12
triplepoint at gmail dot com
13 years ago
Regarding maintaining the case of the find/replace for search-highlighting purposes:

if the performance hit of a regular expression isn't a big problem, there's something like:

<?php
function highlight_matches($find_text, $text) {
return
preg_replace("/($find_text)/i", '<span class="search_item">$1</span>', $text);
}
?>
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