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    <p>The query parameter "style" is an array in this case and must be identified by square brackets - if not, the last key=value pair will overwrite the others.</p> <pre><code>?style[]=ranch&amp;style[]=barn&amp;style[]=colonial </code></pre> <p><code>$_GET['style']</code> is an array then you can loop over by using <code>foreach</code>:</p> <pre><code>foreach ($_GET['style'] as $value) { // ... } </code></pre> <p>if 'style' is not the only parameter you want to add, you can use a <code>is_array()</code> check in the <code>foreach</code> loop:</p> <pre><code> foreach ($_GET as $key =&gt; $value) { if ($i == 1){ $sqlStyle .= "where "; }else{ $sqlStyle .= " and "; } if(is_array($value)) { $sec = array(); foreach($value as $second_level) { $sec[] = $key . " LIKE '%" . $second_level."%'"; } $sqlStyle .= implode(' AND ', $sec); } else { $sqlStyle .= $key . " LIKE '%" . $value ."%'"; } $i++; } echo $sqlStyle; </code></pre> <p>alternative without foreach:</p> <pre><code>&lt;?php $statement = "SELECT DISTINCT COUNT(*) as count FROM `houses_single`"; if(is_array($_GET)) { $statement .= ' WHERE'; // create copy to keep the $_GET array $add_where = $_GET; array_walk(function($elem,$key){ is_array($elem) { return implode(' AND ', array_map(function($sec) using ($key) { return "$key LIKE '%$sec%'"; }, $elem); } else { return "$key LIKE '%$elem%'"; } },$add_where); $statement .= implode(' AND ', $add_where); } </code></pre> <p><em>(codes are untested)</em></p> <p>Sidenode about safety: I hope you won't use this code snippet you provided in productive environment without any escaping of the parameters.</p>
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    1. COhow do i loop through the querystring then? and I know WHY you say not to do that in production, but HOW do I do that?
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    2. COUpdated the answer, hope this fits your needs. For security take a look at [`mysqli_real_escape_string`](http://www.php.net/manual/de/mysqli.real-escape-string.php)
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