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POChecking if a string contains a username from a database to make a message green
 

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  1. POChecking if a string contains a username from a database to make a message green
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    <p>I am trying to get a list of username from a database to see if a message contains @username, and right now I have this code:</p> <pre><code>if (strpos($data[3], '@') !== false) { $user_array_thing = array(); $user_query = mysql_query("SELECT username FROM users"); while($user_username = mysql_fetch_array($user_query) &amp;&amp; in_array($data[4],$user_array_thing) === false){ if(strpos($data[3],'@'.$user_username['username']) !== false){ //echo a message to somebody echo '&lt;li class="qn"&gt;&lt;a href="/status/index.php?user='.$prof_user.'&amp;status='.$data[4].'" class="qn_vis"&gt;&lt;font color="#007a00"&gt;&lt;b&gt;&lt;&lt; '.$data[2].':&lt;/b&gt;&amp;nbsp;&amp;nbsp;'.$data[3].'&lt;/font&gt; - &lt;font size="1" color="#a3a3a3"&gt;'.Timesince(strtotime($time)).' ago&lt;/font&gt;&lt;/a&gt;&lt;/a&gt;&lt;!--&lt;div id="delete'.$data[4].'" style="display:none; margin:0px;" class="qn_div"&gt;&lt;form method="post" action=""&gt;&lt;input type="hidden" name="messageid" id="messageid" value="'.$data[4].'" /&gt;&lt;input class="button small red" type="submit" id="delete" name="delete" value="Delete" /&gt;&lt;/form&gt;&lt;br&gt;&lt;/div&gt;--&gt;'; $user_array_thing[] = $data[4]; } } } else { $data[3] = preg_replace('|\B#([\d\w_]+)|i', '&lt;font color="#8020E0"&gt;$0&lt;/font&gt;', $data[3]); $data[3] = preg_replace('|\B\@([\d\w_]+)|i', '&lt;font color="#1378E0"&gt;$0&lt;/font&gt;', $data[3]); echo '&lt;li class="qn"&gt;&lt;a href="/status/index.php?user='.$prof_user.'&amp;status='.$data[4].'" class="qn_vis"&gt;&lt;img src="/images/icons/web/Bubble3.png" /&gt;&lt;font color="#147CE6"&gt;&lt;b&gt;'.$data[2].' said&lt;/font&gt;:&lt;/b&gt;&amp;nbsp;&amp;nbsp;'.$data[3].'&lt;font size="1" color="#a3a3a3"&gt; - '.$commentcount.''.Timesince(strtotime($time)).' ago&lt;/font&gt;&lt;/a&gt;&lt;/a&gt;'; } </code></pre> <p>It works perfectly, until you post something with an e-mail address in it, like 'someone@gmail.com'</p> <p>gmail.com is not in the database, but is still turning green. I'm not sure what I've done wrong, I've been trying to fix this for days now, to no avail. Any suggestions would be nice</p>
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    1. USTheNytangel
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    1. CO[**Please, don't use `mysql_*` functions in new code**](http://bit.ly/phpmsql). They are no longer maintained [and are officially deprecated](https://wiki.php.net/rfc/mysql_deprecation). See the [**red box**](http://j.mp/Te9zIL)? Learn about [*prepared statements*](http://j.mp/T9hLWi) instead, and use [PDO](http://php.net/pdo) or [MySQLi](http://php.net/mysqli) - [this article](http://j.mp/QEx8IB) will help you decide which. If you choose PDO, [here is a good tutorial](http://j.mp/PoWehJ).
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    2. COUnrelated suggestion, but use semantic markup rather than explicitly setting a font color inline. Use CSS classes, but more than that, CSS classes that describe the meaning of the element on the page. For example, use "user-message-highlight" instead of directly setting the color to green and "message-submit-button" instead of "button small red". It makes it easier to maintain your thematic elements since it's all in your CSS and easier to understand what the intent of the mark up is.
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      1. UStvanfosson
 

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