str_ireplace

(PHP 5, PHP 7, PHP 8)

str_ireplacestr_replace() 的忽略大小写版本

说明

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

该函数返回一个字符串或者数组。该字符串或数组是将 subject 中全部的 search 都被 replace 替换(忽略大小写)之后的结果。如果没有一些特殊的替换规则,你应该使用该函数替换带有 i 修正符的 preg_replace() 函数。

参数

如果 searchreplace 为数组,那么 str_ireplace() 将对 subject 做二者的映射替换。如果 replace 的值的个数少于 search 的个数,多余的替换将使用空字符串来进行。如果 search 是一个数组而 replace 是一个字符串,那么 search 中每个元素的替换将始终使用这个字符串。

如果 searchreplace 是数组,他们的元素将从头到尾一个个处理。

search

要搜索的值,就像是 needle。可以使用 array 来提供多个 needle。

replace

search 的替换值。一个数组可以被用来指定多重替换。

subject

要被搜索和替换的字符串或数组,就像是 haystack

如果 subject 是一个数组,替换操作将遍历整个 subject,并且也将返回一个数组。

count

如果被指定,它的值将被设置为替换发生的次数。

返回值

返回替换后的字符串或者数组。

范例

Example #1 str_ireplace() 范例

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

注释

Note: 此函数可安全用于二进制对象。

Caution

Replacement order gotcha

Because str_ireplace() replaces left to right, it might replace a previously inserted value when doing multiple replacements. Example #2 in the str_replace() documentation demonstrates how this may affect you in practice.

参见

User Contributed Notes

Anteaus 02-Jan-2015 08:41
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!
Psudo - thepsudo at gmail dot com 29-Jun-2011 09:53
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.
holblin at holblin dot com 09-Mar-2011 01:11
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);
}
?>
stepanic dot matija at gmail dot com 21-Oct-2010 08:57
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;
}
?>
triplepoint at gmail dot com 23-Sep-2010 10:06
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);
}
?>
ishutko at gmail dot com 16-Mar-2009 01:49
For function work with cirilic

setlocale (LC_ALL, 'ru_RU');
sawdust 04-Dec-2008 07:28
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;
}
?>
Michael dot Bond at mail dot wvu dot edu 14-Nov-2008 06:44
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);
}
?>
hfuecks at nospam dot org 04-Jul-2005 02:07
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.
daevid at daevid dot com 05-Apr-2005 01:14
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
?>
aidan at php dot net 30-May-2004 10:36
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
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