PHP implementation of the article content keyword added inner chain _php tutorial

Website articles automatically add links to the site this I think most of the students have this function, the following small series summed up the three kinds of articles within the chain automatically added function, from the top down, the best method on the top.

Example 1

The code is as follows

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/** * Add links to keywords in content * Only deal with the first occurrence of keywords, the key to the existing link will not be linked to support Chinese and English * $content: string literal * $keyword: string keyword * $link: String, link */ function Yang_keyword_link ($content, $keyword, $link) { Exclude keywords from a picture $content = Preg_replace (' | () *?) ('. $keyword. ') ([^>]*?>) | U ', ' $1%&&&&&%$3 ', $content); $regEx = '/(?! (<.*?) | (]*?) >) | ([^>]*?)] /si '; $url = ". $keyword."; $content = Preg_replace ($regEx, $url, $content, 1); Restore keywords in a picture $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 = "". $spotUrlPair [0]. ""; Description inside only text, no picture, so just note a link $tmp 1 = Explode ("$is _replaced=false; foreach ($tmp 1 as $key = = $item) { $tmp 2 = Explode ("", $item); if (sizeof ($tmp 2) >1) { if (substr ($tmp 2[0],0,1)! = "a" && substr ($tmp 2[0],0,1)! = "a") { if ($is _replaced===false) { $tmp 2[1] = innerlink::str_replace_once ($spotUrlPair [0], $replace, $tmp 2[1], $is _replaced); } $tmp 1[$key] = Implode ("", $tmp 2); } }else { if (is_string ($item) && $is _replaced===false) { $tmp 1[$key] = innerlink::str_replace_once ($spotUrlPair [0], $replace, $item, $is _replaced); } } } $description = Implode ("} 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 is what I wrote when I first learned PHP, and I feel a bit of a problem.

The code is as follows

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$keys =array ( Array (' Web effects ', '/js_a/js.html '), Array (' SEO ', '/seo/seo.html '), Array (' php ', '/phper/php.html '), Array (' JSP ', '/jsp/jsp.html '), Array (' ASP ', '/asp/asp.html '), Array (' ps ', '/fw/photo.html '), Array (' Photoshop ', '/fw/photo.html '), Array (' JavaScript ', '/js_a/js.html '), Array ('. Net ', '/net/net.html '), Array (' Non-mainstream ', '/fw/photo.html '), Array (' Network ', '/mon/mon.html '), Array (' CSS ', '/cssdiv/css.html '), Array (' Graphic design ', '/fw/photo.html '), Array (' website ', '/person/'), Array (' Web authoring ', '/wy/yw.html '), Array (' Search engine ', '/seo/seo.html '), Array (' Optimization ', '/seo/seo.html '), Array (' animation ', '/flash_a/flash.html '), Array (' database ', '/database/database.html '), Array (' Earn money ', '/mon/mon.html '), Array (' Operations ', '/mon/mon.html ') ); $STR = "Today is May 30, 2010, My site problems this SEO has a lot of problems, SEO is SEO, before learning php good AH now think JSP good, Css+div, Web page, Web design, web production, Web learning, Web teaching, Photoshop,flash,html,css,dreamweaver,fireworks,asp,php,jsp,asp.net, website construction, website development, web effects, graphic design, personal website, web material "; Echo $str, " "; foreach ($keys as $nkeys) { Print_r ($nkeys); echo " "; foreach ($nkeys as $join) { Echo ($join), " "; if (Strpos ($str, $nkeys [0])) { $str =str_replace ($nkeys [0], "". $nkeys [0]. "", $STR); } //} } Echo $str; ?>

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