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POAutomatically convert keywords to links in php
 

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  1. POAutomatically convert keywords to links in php
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    <p>I am trying to convert specific keywords in text, which are stored in array, to the links.</p> <p>Example text:</p> <pre><code>$text='This text contains many keywords, but also formated &lt;a href="#keywords" title="keywords"&gt;keywords&lt;/a&gt;.' </code></pre> <p>So now I want to convert the word <strong>keywords</strong> to the <code>&lt;a href="#keywords" title="keywords"&gt;#keywords&lt;/a&gt;</code>.</p> <p>I used the very simple preg_replace function</p> <pre><code>preg_replace('/keywords/i',' &lt;a href="#keywords"&gt;keywords&lt;/a&gt; ',$text); </code></pre> <p>but obviously it converts to link also the string <strong>already</strong> formatted as a link, so I get a messy html like:</p> <pre><code>$text='This text contains many &lt;a href="#keywords" title="keywords"&gt;keywords&lt;/a&gt;, but also formated &lt;a href="#&lt;a href="#keywords" title="keywords"&gt;keywords&lt;/a&gt;" title="&lt;a href="#keywords" title="keywords"&gt;keywords&lt;/a&gt;"&gt;&lt;a href="#keywords" title="keywords"&gt;keywords&lt;/a&gt;&lt;/a&gt;.' </code></pre> <p>Expected result:</p> <pre><code>$text='This text contains many &lt;a href="#keywords" title="keywords"&gt;keywords&lt;/a&gt;, but also formated &lt;a href="#keywords" title="keywords"&gt;keywords&lt;/a&gt;.' </code></pre> <p>Any suggestions? THX</p> <p><strong>EDIT</strong></p> <p>We are one step from the perfect function, but still not working well in this case:</p> <pre><code>$text='This text contains many keywords, but also formated &lt;a href="http://www.keywords.com/keywords" title="keywords"&gt;keywords&lt;/a&gt;.' </code></pre> <p>In this case it replaces also the word <code>keywords</code> in the href, so we again get the messy code like</p> <pre><code> &lt;a href="http://www.&lt;a href="http://www.keywords.com/keywords" title="keywords"&gt;keywords&lt;/a&gt;.com/&lt;a href="http://www.keywords.com/keywords" title="keywords"&gt;keywords&lt;/a&gt;" title="keywords"&gt;keywords&lt;/a&gt; </code></pre>
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    1. COJust my two cents, but since an href of '#something' would actually be a valid reference, I suggest using something else, for example a percentage sign, so that you don't some day accidentically replace an ordinary link.
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    2. COactually that is just an example to show the the word keywords can occur also in the href="".
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    3. COThat just reinforces my point. You ought to re-read what I said. :)
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