php中文手册

目录搜索

文字

eregi_replace

(PHP 4, PHP 5)

eregi_replace — 不区分大小写的正则表达式替换

说明

string eregi_replace ( string $pattern , string $replacement , string $string )

本函数和 ereg_replace() 完全相同，只除了在匹配字母字符时忽略大小写的区别。

Example #1 高亮搜索结果

  <?php
$pattern  =  '(>[^<]*)(' .  quotemeta ( $_GET [ 'search' ]) . ')' ;
 $replacement  =  '\\1<span class="search">\\2</span>' ;
 $body  =  eregi_replace ( $pattern ,  $replacement ,  $body );
 ?>

参见 ereg() ， eregi() 和 ereg_replace() 。

用户评论:

[#1] dave at bevhost dot com [2012-01-06 12:22:57]

The easiest function to replace this with is mb_eregi_replace(),
which is the mutibyte version that works on unicode characters such as chinese letters in your strings.

[#2] jgriggs777 at yahoo dot com [2008-06-06 07:26:37]

My apologies. I'm a PHP newbie and the count function didn't work right if you have more than one "keyword". I searched and spent a long time to get this to work right, so wanted to share it.

This is very easy to use by doing the following.

$text - is the text to search
$words - are the words to highlight (search text)
$the_place - is so that you can tell your users what "area" was searched.

<?php function highlight_this($text, $words, $the_place) { $words = trim($words); $the_count = 0; $wordsArray = explode(' ', $words); foreach($wordsArray as $word) { if(strlen(trim($word)) != 0) //exclude these words from being replaced $exclude_list = array("word1", "word2", "word3"); // Check if it's excluded if ( in_array( strtolower($word), $exclude_list ) ) { } else { $text = str_ireplace($word, "".strtoupper($word)."", $text, $count); $the_count = $count + $the_count; } } //added to show how many keywords were found echo " <div class=\"emphasis\">A search for " . $words. " found " . $the_count . " matches within the " . $the_place. ".</div> "; return $text; } //example of how to use $text_to_highlight = highlight_this($text_to_highlight, $search_text, "Place you searched"); ?>

[#3] jgriggs777 at yahoo dot com [2008-06-05 12:56:05]

I modified the script from the note below this one so that you could show how many matches were found. I know this should probably be posted in the str_ireplace() area, so I will post it there afterwards.

$text - is the text to search
$words - are the words to highlight (search text)
$the_place - is so that you can tell your users what "area" was searched.

<?php function highlight_this($text, $words, $the_place) { $words = trim($words); $wordsArray = explode(' ', $words); foreach($wordsArray as $word) { if(strlen(trim($word)) != 0) $text = str_ireplace($word, "".strtoupper($word)."", $text, $count); } //added to show how many keywords were found echo " <div class=\"emphasis\">A search for " . $words. " found " . $count . " matches within the " . $the_place. ".</div> "; //end script modification return $text; } ?>

[#4] a dot dotreppe at gmail dot com [2008-05-20 15:49:39]

Hi everyone.
I saw a lot of highlighting functions, but no one was simple... maybe I missed a part of discussion ?

Anyway, I think this function is the easiest:

<?php function highlight($text, $words) { $words = trim($words); $wordsArray = explode(' ', $words); foreach($wordsArray as $word) { if(strlen(trim($word)) != 0) $text = eregi_replace($word, '\\0', $text); } return $text; } ?>

[#5] dan at dotgospel dot com [2008-02-22 19:30:38]

[#6] mp3spl at o2 dot pl [2007-12-23 04:40:05]

Nice way to highlight that what someone search.

For example is some one search for "Wire Mobile 6"

It will highlight every word separated even if found "Wire Xp and some mobile stuff"

? and ? are importiant, because without special signs, string in second turn will convert also 
which will be already in text.

<?php $searchcolor = explode(' ',$search); $ilosc = count($searchcolor); $ilosc2 = "0"; while ($ilosc2 != $ilosc ) { $name = eregi_replace ($searchcolor[$ilosc2],'?'.$searchcolor[$ilosc2].'?',$name); $ilosc2++; } $name = str_replace('?','',$name); $name = str_replace('?','',$name); echo $name; ?>

[#7] augusto at fagioli dot biz [2007-12-21 00:50:36]

related to the private at sfiac dot net function,
please note that you  can add a dot in the

$c=ereg_replace".
   "("[-a-z0-9!#$%&\'*+/=?^_`{|}~]+@([.]?[a-zA-Z0-9_/-])*",".
   "$e,$c);

having it to find email address like user.name@test.com

this is my example
$c=ereg_replace".
   "("[-a-z0-9.!#$%&\'*+/=?^_`{|}~]+@([.]?[a-zA-Z0-9_/-])*",".
   "$e,$c);

[#8] webmaster at hhgroups dot com [2007-11-28 01:24:30]

Your remove links functions are incorrect if there are a php var in the URL, we have to add '?' character inside our pattern, I have three this function working correctly with php vars:

function transformUrl($str){
$str=utf8_decode(urldecode($str));
$str=eregi_replace("(^| |>)(www([.]?[a-zA-Z0-9_/-?])[^<]*)", "\\1<a href=\"http://\\2\">Look link</a>", $str);
$str=eregi_replace("(^| |>)(http://www([.]?[a-zA-Z0-9_/-?])[^<]*)", "\\1<a href=\"\\2\">Look link</a>", $str);
$str=eregi_replace("(^| |>)(http://([.]?[a-zA-Z0-9_/-?])[^<]*)", "\\1<a href=\"\\2\">Look link</a>", $str);
return utf8_encode($str);
}

[#9] php[at]drixe[dot]net [2007-06-24 12:49:31]

Melissa,
This one is a better setup for your marvelous code.
It handles Melissa Magic and also Magic Melissa

function underline($subject, $word)
{
$mywords = explode(" ",$word);
for ($j=0;$j<count($mywords);$j++)
{
$regex_chars = '\.+?(){}[]^$';
for ($i=0; $i<strlen($regex_chars); $i++)
{
$char = substr($regex_chars, $i, 1);
$mywords[$j] = str_replace($char, '\\'.$char, $mywords[$j]);
}
$mywords[$j] = '(.*)('.$mywords[$j].')(.*)';
$subject = eregi_replace($mywords[$j], '\1\2\3', $subject);
}
return $subject;
}

[#10] spiritualmind at gmail dot com [2007-06-11 08:19:58]

eregi_replace seems not to deal with UTF8 chars !
I needed to utf8_decode / encode my string to parse it in eregi_replace :

<?php $input = "string_from_utf8_form" ; $output = utf8_encode(eregi_replace("(pattern)", "replacement", utf8_decode($input)) ; echo $output ; ?>

I think UTF8 is not totally supported by PHP.

[#11] Vladimir Luchaninov [2006-10-22 07:38:17]

If you have plain text e-mails and links but need to make them real links

<?php function replaceLinks($text) { // convert support@pogoda.in into // <a href="mailto:support@pogoda.in"> // support@pogoda.in</a> $text = ereg_replace('[-a-z0-9!#$%&\'*+/=?^_`{|}~]+@([.]?[a-zA-Z0-9_/-])*', '<a href="mailto:\\0">\\0</a>',$text); // convert http://www.pogoda.in/new_york/eng/ into // <a href="http://pogoda.in/new_york/eng/"> // pogoda.in/new_york/eng/</a> $text = ereg_replace('[a-zA-Z]+://(([.]?[a-zA-Z0-9_/-])*)', '<a href="\\0">\\1</a>',$text); // convert www.pogoda.in/new_york/eng/ into // <a href="http://www.pogoda.in/new_york/eng/"> // www.pogoda.in/new_york/eng/</a> $text = ereg_replace('(^| )(www([-]*[.]?[a-zA-Z0-9_/-?&%])*)', ' <a href="http://\\2">\\2</a>',$text); return $text; } ?>

[#12] carlos at braziland dot com [2006-05-15 17:11:27]

@bluedragonx at gmail dot com: Now you're calling two functions instead of one. I'm trully curious if that would still be faster.

My original post was just to highlight the need to escape characters that could be used to abuse a contact form. Something everyone should do, especially if doing it for a customer.

But bluedragonx, thanks for your input.

[#13] melissa at melissagirl dot com [2006-04-14 09:28:57]

Here's a nice case-insensitive highlight function that ignores any regular expression characters and highlights a word and leaves it in whatever case it was before:

<?php function highlight($word, $subject) { $regex_chars = '\.+?(){}[]^$'; for ($i=0; $i<strlen($regex_chars); $i++) { $char = substr($regex_chars, $i, 1); $word = str_replace($char, '\\'.$char, $word); } $word = '(.*)('.$word.')(.*)'; return eregi_replace($word, '\1\2\3', $subject); } ?>

[#14] [2005-11-02 03:06:55]

@bluedragonx: You're right. And i got the order of the params wrong as well, must've been sleepy when i wrote that note. For what it's worth:

<?php $_POST['email'] = str_replace("[at]", "@", strtolower($_POST['email'])); ?>

Not similar to Carlos' code though, since it'll convert all characters to lowercase.

[#15] bluedragonx at gmail dot com [2005-10-16 16:42:44]

Actually that wouldn't work because str_replace is case sensitive. So any instances of [AT] [aT] or [At] would be ignored.

[#16] php dot net at nr78 dot net [2005-08-08 05:36:23]

@carlos at braziland dot com: Hate to be a wisecrack, but i believe the following code might be slightly faster with the same result:

<?php $_POST['email'] = str_replace("@", "[at]", $_POST['email']); ?>

[#17] carlos at braziland dot com [2005-07-31 12:54:04]

So here is my answer to those who are trying to submit headers through my simple contact form:

$any_form_field = eregi_replace("@","[at]",$_POST['just_one_field']); //how can anyone send emails to other email addresses without the @ symbol :)

My suggestion is to do a foreach loop in the $_POST array and remove the @ symbol from all fields (unless you want one of the fields to have the @ symbol, in which case it should be very careful and question if the symbol is necessary).

Not the best solution, but it's simple and it works.

[#18] joltmans at amersel dot com [2005-03-01 11:06:25]

PHP's Regex engine differs from several others in its treatment of parsing spaces.

In many Regex languages '\s' denotes a space.
PHP does not recognize '\s', just type a space ' ' instead.

This simple example illustrates the problem:
<?php $string = "A sentence with spaces"; if (eregi("with\s*spaces", $string)) { // Will never print echo "PHP understood \s"; } else { // Will always print echo "PHP doesn't understand \s"; } ?>

This example does work:
<?php $string = "A sentence with spaces"; if (eregi("with *spaces", $string)) { // Will print echo "PHP understood ' '"; } ?>

[#19] [2005-01-27 08:15:44]

never mind my last post for the eregi_replace not replacing.

I just used str_replace instead and it works fine. I must have had something wrong with my search string. POSIX, Perl.. hmm.. yeah probably something there.

Mettedraq / Gene

[#20] Ausvald [2004-06-19 16:21:41]

Zach Johnson missed up. ereg* funcs use posix regex, not the rfc one

[#21] furiousgreencloud at yahoo dot com [2004-06-17 20:47:11]

To simply convert wild input into a sensable sting, say for a filename I use:

function cleanString($wild) {
return ereg_replace("[^[:alnum:]+]","",$wild);
}

echo cleanString("@#$&*$@#H~e'{}l{}l<o\{}"); // outputs: Hello

[#22] e dot boeters at planet dot nl [2004-06-03 16:46:34]

This is a 'faster' way to highlight search results:

$content = str_replace($query, "" . $query . "", $content);

[#23] julien at ratatouille dot com dot fr [2003-11-24 18:28:11]

This function replace < and > symbols between <code> and </code> tags by html code for lower than (<) and greather than (>) elements.

function retourne_format_code($texte)
{
$tablo=split("<code>",$texte);
$texte="";
$texte.=$tablo[0];
foreach($tablo as $cle=>$valeur)
{
if(eregi("</code>",$valeur))
{
$tablo1=split("</code>",$valeur);
$tablo1[0]=eregi_replace("<","<",$tablo1[0]);
$tablo1[0]=eregi_replace(">",">",$tablo1[0]);
foreach($tablo1 as $cle1=>$valeur1)
{
if($cle1==0)
$valeur1="<code>".$valeur1."</code>";
$texte.=$valeur1;
}
}
}
return $texte;
}

[#24] martin_goldmann at gmx dot net [2003-11-18 12:43:38]

After reading the last message I wrote that de-spamizer:

function despamMailURI($myStrMail='')
{
?>javascript:void(location.href='mailto:'+<?php=eregi_replace( "^([_\.0-9a-z-]+)@([0-9a-z][0-9a-z-]+)\.([a-z]{2,6})$", "'\\1'+'@'+'\\2'+'.'+'\\3'",$myStrMail)?>)<?php } Usage example: <a href="<?php=despamMailURI("user@foo.bar")?>">Mail me</a>

[#25] iparanoid at gmx dot de [2003-08-23 21:03:23]

To obtain the an email addresse in the scheme user at host dot use following function

function antispam_mail($mail) {
return eregi_replace( "^([_\.0-9a-z-]+)@([0-9a-z][0-9a-z-]+)\.([a-z]{2,6})$", '\\1 at \\2 dot \\3',$mail );
};

Combined with a wee JavaScript (document.location='mailto:'+user+'@'+host+'.'+tld) this provides a very powerfull anti-spam mechanism while providing full mailto: link functionality.

[#26] chpins-php at romu92 dot freesurf dot fr [2003-06-02 16:15:49]

function AHREF2text($string) {
return eregi_replace('(<a [^<]*href=["|\']?([^ "\']*)["|\']?[^>].*>([^<]*)</a>)','[\\3] (link: \\2)', $string);
}

// by Ch'Pins

[#27] buddy at directpay dot cz [2003-05-14 10:22:00]

i had to solve problem conserning DB2 timestamp format. here is how to parse ANSI timestamp format to DB2 timestamp format:

$mydate = Date("Y-m-d H:i:s");

$var = eregi_replace
("([0-9]{4}-[0-9]{2}-[0-9]{2}) ([0-9]{2}):([0-9]{2}):([0-9]{2})"
,"\\1-\\2.\\3.\\4",$mydate);

echo "ANSI: $mydate, DB2 format: $var";

happy codding
buddy

[#28] eder at xce dot de [2003-05-03 19:23:29]

function AHREF2text($string) {
return eregi_replace('(<a [^<]*href=["|\']?([^ "\']*)["|\']?[^>]*>([^<]*)</a>)','[\\3] (link: \\2)', $string);
}

[#29] Rainmaker526 at hotmail.com [2003-03-09 19:02:19]

I have found that some characters cannot be used by eregi_replace (or ereg_replace). When you get the REG_BADRPT error, try backslashing any special chars in your pattern string

ex.
$str = eregi_replace("*", "", $somevar)

gives the REG_BADRPT error. Change it to
$str = eregi_replace("\*", "", $somevar)

to make it work

[#30] php at silisoftware dot com [2003-02-18 11:08:28]

Transform HTML links into plain-text "links" with the URL visible

function AHREF2text($string) {
return eregi_replace('<A .*HREF=("|\')?([^ "\']*)("|\')?.*>([^<]*)</A>', '[\\4] (link: \\2)', $string);
}

$HTMLstring = 'A link to <a href="http://www.php.net">PHP.net</A>';
echo AHREF2text($HTMLstring);
// prints: A link to [PHP.net] (link: http://www.php.net)

[#31] simon_a99 at yahoo dot co dot uk [2002-08-27 12:07:30]

To find a string regardless of case, you might want to use the matched string in the replacement string without changing its case.

For example, you're searching for $search = "letter" and the text being searched is $text = "post lEtTeR". I want to change the format of the matched string.

Do this:
eregi_replace($search, "\\0", $text);

$text has now been changed to "post lEtTeR". \\0 is the entire text matched (lEtTer in this case).