Php implements adding internal links with keyword in the article content

Example 1

The code is as follows:

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/** * Add links to keywords in the content * Only processes the keywords that appear for the first time, and does not add links to the existing links. It supports both Chinese and English * $ Content: string original string * $ Keyword: string keyword * $ Link: string, link */ Function yang_keyword_link ($ content, $ keyword, $ link ){ // Exclude keywords from the image $ Content = preg_replace ('| (] *?) ('. $ Keyword.') ([^>] *?>) | U', '$ 1% & % $3', $ content ); $ RegEx = '/(?! (<.*?) | (<.*?))) ('. $ Keyword .')(?! ([^ <>] *?)>) | ([^>] *? </A>)/si '; $ Url = '<a href = "'. $ link. '">'. $ keyword. '</a> '; $ Content = preg_replace ($ regEx, $ url, $ content, 1 ); // Restore the keywords in the image $ Content = str_replace ('% & %', $ keyword, $ content ); Return $ content; }

Example 2

The code is as follows:

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Include_once (dirname (_ file _). "/../db/DBViewSpot. php "); Class InnerLink { Private static $ spotUrlMap; /** * Generate view spots keywords link      * * @ Param string $ description * @ Param array $ spotUrlMap * @ Return string */ Public static function genSpotLink ($ basePath, $ description)     { If (empty (InnerLink: $ spotUrlMap )){ InnerLink: $ spotUrlMap = DBViewSpot: getSpotPare ();         } // Exclude irregular data If (empty ($ description )){ Return $ description;         } Foreach (InnerLink: $ spotUrlMap AS $ spotUrlPair ){ $ Replace = "<a target = '_ blank' href = 'http: // pzg412403.blog.163.com/blog /". $ basePath. "/". $ spotUrlPair [1]. ". html '> ". $ spotUrlPair [0]. "</a> "; // The description contains only text and no image, so pay attention to the link. $ Tmp1 = explode ("<a", $ description ); $ Is_replaced = false; Foreach ($ tmp1 as $ key => $ item ){ $ Tmp2 = explode ("</a>", $ item ); If (sizeof ($ tmp2)> 1 ){ If (substr ($ tmp2 [0], 0, 1 )! = "A" & substr ($ tmp2 [0], 0, 1 )! = ""){ If ($ is_replaced === false ){ $ Tmp2 [1] = InnerLink: str_replace_once ($ spotUrlPair [0], $ replace, $ tmp2 [1], $ is_replaced );                         } $ Tmp1 [$ key] = implode ("</a>", $ tmp2 );                     } } Else { If (is_string ($ item) & $ is_replaced === false ){ $ Tmp1 [$ key] = InnerLink: str_replace_once ($ spotUrlPair [0], $ replace, $ item, $ is_replaced );                     }                 }             } $ Description = implode ("<a", $ tmp1 );         } Return $ description;     } /** * Replace key word for one time      * * @ Param string $ needle * @ Param string $ replace * @ Param string $ haystack * @ Param bool $ is_replaced * @ Return string */ Private static function str_replace_once ($ needle, $ replace, $ haystack, & $ is_replaced ){ $ Pos = strpos ($ haystack, $ needle ); If ($ pos = false ){ Return $ haystack;         } $ Is_replaced = true; Return substr_replace ($ haystack, $ replace, $ pos, strlen ($ needle ));     } }

Example 3

This was written when I first learned php, and it felt a bit problematic.

The code is as follows:

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<? Php $ Keys = array ( Array ('webpage effect ', 'http: // www.111cn.net/js_a/js.html '), Array ('SEO ', 'http: // www.111cn.net/seo/seo.html '), Array ('php', '/phper/php.html '), Array ('JSP ','/jsp/jsp.html '), Array ('asp ','/asp/asp.html '), Array ('ps', 'http: // www.111cn.net/fw/photo.html '), Array ('Photoshop ', 'http: // www.111cn.net/fw/photo.html '), Array ('javascript ', 'http: // www.111cn.net/js_a/js.html '), Array ('. Net','/net/net.html '), Array ('nonmainstream ', 'http: // www.111cn.net/fw/photo.html '), Array ('Network', 'http: // www.111cn.net/mon/mon.html '), Array ('css ','/cssdiv/css.html '), Array ('Graphic Design ', 'http: // www.111cn.net/fw/photo.html '), Array ('Website', '/person /'), Array ('webpage maker ', 'http: // www.111cn.net/wy/yunchtml '), Array ('search engine ', 'http: // www.111cn.net/seo/seo.html '), Array ('Optimization', 'http: // www.111cn.net/seo/seo.html '), Array ('animate', '/flash_a/flash.html '), Array ('database', '/database/database.html '), Array ('earning money ', 'http: // www.111cn.net/mon/mon.html '), Array ('operation', 'http: // www.111cn.net/mon/mon.html ')             );           $ Str = "today is July 22, May 30, 2010. My website encountered problems. There are many seo problems. seo is the optimization of search engines. I used to learn php well. Now I think jsp is good, css + div, webpage, webpage design, webpage creation, webpage learning, webpage teaching, Photoshop, Flash, HTML, CSS, Dreamweaver, Fireworks, ASP, PHP, JSP, ASP. NET, website construction, website development, webpage special effects, graphic design, personal website, webpage materials ";           Echo $ str, "<br> "; Foreach ($ keys as $ nkeys ){ // Print_r ($ nkeys); echo "<br> "; // Foreach ($ nkeys as $ join ){ // Echo ($ join), "<br> "; If (strpos ($ str, $ nkeys [0]) { $ Str = str_replace ($ nkeys [0], "<a href = http://www.111cn.net ". $ nkeys [1]. "target = _ blank> ". $ nkeys [0]. "</a>", $ str );            }  //}     }            Echo $ str; ?>