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POHow to replace words with preg_replace without duplicates?
 

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  1. POHow to replace words with preg_replace without duplicates?
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    <p>I want to create a PHP function which will replace certain words out of a text with internal links. That works so far, but if I have two matches, I end up with invalid HTML code.</p> <p>Example:</p> <pre> Welpen /hunde Chihuahua Welpen /hunde,chihuahua </pre> <pre><code>function seo_internal_links($str, $links, $limit) { foreach($links AS $link){ $pattern[$k] = "~\b($link[phrase])\b~i"; $replace[$k] = '&lt;a href="'.$link[link].'"&gt;\\1&lt;/a&gt;'; $k++; } return preg_replace($pattern,$replace,$str, $limit); } seo_internal_links($ad[text], $seo_internal_links, $limit = 1); </code></pre> <p>This will result in:</p> <pre><code>&lt;a href="//hunde,chihuahua"&gt;Chihuahua &lt;a href="/hunde"&gt;Welpen&lt;/a&gt;&lt;/a&gt; </code></pre> <p>Has somebody an idea on how to avoid this? I would also like to limit the amount of hits, but the limit in preg_replace accounts only for unique words, not the whole array.</p> <hr> <p>Some adtional explanation.</p> <p>I am pulling the words to replace and their coresponding replacements out of a table. There are hundreds of them. </p> <pre><code> $stmt =" SELECT * FROM $T73 ORDER BY prio desc "; $result = execute_stmt($stmt, $link); while ($row = mysql_fetch_object($result)){ $seo_internal_links[$row-&gt;ID]['phrase'] = $row-&gt;phrase; $seo_internal_links[$row-&gt;ID]['link'] = $row-&gt;link; } $my[text] = seo_internal_links($my[text], $seo_internal_links, $limit = 1); </code></pre> <p>The Problem occures, because the replacement function will start at the beginning of the text again to search for the next word. Instead it should just continue inside the text.</p> <p>My goal is to insert internal links to my website text whenever a relevant word is found inside a table full of keywords. For example replace "beagle welpen" with "<a href="/bla">beagle welpen</a>. If the word "welpen" is also inside the table, it will break the html code and insert a href tag again.</p>
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