PHP Regular Expression replaces the site keyword link with a blank solution, regular expression keyword

Last Update:2014-09-18 Source: Internet

Author: User

Tags php regular expression

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PHP Regular Expression replaces the site keyword link with a blank solution, regular expression keyword

The title is inappropriate. The specific situation is as follows: the website needs to add the keyword link function, then it needs to match and replace the content of the article with a regular expression, and then uses the preg_replace function. The replaced program code is as follows:

Function ReplaceKeyword ($ linkDefs, $ content) {$ linkMap = array ();/* foreach ($ linkDefs as $ row) {$ linkMap [] = explode (',', $ row);} */$ linkMap = $ linkDefs; // replace the original link with the text foreach ($ linkMap as $ row) {$ content = preg_replace ('/(<. *?> \ S *)('. $ row [0]. ') (\ s * <\/a>)/sui', $ row [0], $ content);} // sort usort ($ linkMap, '_ sortDesc'); // var_dump ($ linkMap); $ tmpKwds = array (); // store the temporarily replaced subkeyword $ k_count = 0; foreach ($ linkMap as $ I =>$ row) {list ($ kwd, $ url) = $ row; for ($ j = $ I + 1; $ j <count ($ linkMap); $ j ++) {$ subKwd = $ linkMap [$ j] [0]; // if other keywords are included, temporarily replace it with other strings, such as tea leaves into if (strpos ($ kwd, $ subKwd )! = False) {$ tmpKwd = ''; $ kwd = str_replace ($ subKwd, $ tmpKwd, $ kwd); $ tmpKwds [$ tmpKwd] = $ subKwd ;}} // Replace the text with the link require (MLEINC. '/config/globals. config. php '); $ th_num = $ config ['keyword _ num']; // number of times the keyword is replaced $ content = preg_replace ('/('. $ row [0]. ')/sui',' <a href = "'. $ row [1]. '"> '. $ kwd. '</a>', $ content, $ th_num, $ count); // all matching items will be replaced by $ k_count + = $ count ;} // Replace the string that replaces the subkeyword with foreach ($ tmpKwds as $ tmp => $ kwd) {$ content = str_replace ($ tmp, $ kwd, $ content );} $ result = array ($ content, $ k_count); return $ result; unset ($ result); unset ($ tmp); unset ($ tmpKwds); unset ($ kwd ); unset ($ count); unset ($ config); unset ($ linkMap); unset ($ linkDefs); unset ($ tmpKwd); unset ($ content ); unset ($ th_num); unset ($ row); unset ($ k_count );}

The program is found on the Internet, and then tested locally. The local environment serves php 5.3 as 5.2. After uploading the program to the Internet, it is blank when it is submitted, the first consideration was the PHP version. I thought it was the difference between ereg preg and it would not work after replacement. Later, I checked it online and found that some netizens said they could adjust the large pcre. backtrack_limit and pcre. recursion_limit. I tried it and it was okay. It seems to be a configuration problem, but in general, the default configuration of PHP should be no problem, I wrote this program is still not good enough!

Php Regular Expression problem. Below is a program that replaces the keyword with the link

I can write it like this. I tried IE6 and FIREFOX 3.0. No problem.
<! Doctype html public "-// W3C // dtd html 4.0 Transitional // EN">
<HTML>
<HEAD>
<TITLE> New Document </TITLE>
<Meta name = "Generator" CONTENT = "EditPlus">
<Meta name = "Author" CONTENT = "">
<Meta name = "Keywords" CONTENT = "">
<Meta name = "Description" CONTENT = "">
</HEAD>

<BODY>
Xhtml Linux
</BODY>
<Script language = "JavaScript">
Document. body. innerHTML = document. body. innerHTML. replace (/(x) | (l)/gi, " $1 $2 ");
</Script>
</HTML>

The following is the innerHTM of the BODY obtained through FIREFOX 3.0.
 X htm l L inu x 
<Script> l anguage = "JavaScript">
Document. body. innerHTM L = document. body. innerHTM L . rep l ace (/( x ) | ( l )/gi, " l or = red> $1 $2 </...... remaining full text>

PHP Regular Expression replacement hyperlink

Use the str_replace Function

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

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