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POJavascript to php the same file
 

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    <p>I have a problem. I need to get the value from a select tag then use it in php for my sql. Here is my code</p> <pre><code>&lt;div class="form-group"&gt; &lt;label&gt; ROOMS &lt;/label&gt; &lt;?php echo "&lt;select value= 'TRoom1' id ='TRoom1' class='form control'&gt;"; echo "&lt;option&gt;Select Room Type&lt;/option&gt;"; while ($row1 = mysql_fetch_array($result2)) { echo "&lt;option&gt;" . $row1['Room_type'] . "&lt;/option&gt;"; } echo "&lt;/select&gt;"; ?&gt; </code></pre> <p></p> <p>this is for the sql command</p> <pre><code> &lt;div class="modal-body"&gt; &lt;div class="container"&gt; &lt;?php $selectedValue = $_POST['TRoom1']; $sql = "SELECT RoomNumber FROM rooms Where Room_type = '$selectedValue' "; $result = mysql_query($sql); echo "&lt;select value= 'RoomNo' id ='RoomID' class='form-control'&gt;"; echo "&lt;option&gt;Select Room Number&lt;/option&gt;"; while ($row = mysql_fetch_array($result)) { echo "&lt;option&gt;" . $row['RoomNumber'] . "&lt;/option&gt;"; } echo "&lt;/select&gt;"; ?&gt; </code></pre> <p>TIA! :))</p> <p>THis is the code ofor room type with its corresponding room number</p> <pre><code> &lt;div class="form-group"&gt; &lt;label for="exampleInputEmail1"&gt; ROOMS &lt;/label&gt; &lt;?php echo "&lt;select value= 'TRoom1' name ='TRoom1' id ='TRoom1' class='form-control'&gt;"; echo "&lt;option&gt;Select Room Type&lt;/option&gt;"; while ($row1 = mysql_fetch_array($result2)) { echo "&lt;option&gt;" . $row1['Room_type'] . "&lt;/option&gt;"; } echo "&lt;/select&gt;"; ?&gt; &lt;/div&gt; &lt;div class="form-group"&gt; &lt;?php $select_value=$_POST['selectedValue']; $sql = "SELECT RoomNumber FROM rooms Where Room_type = '$select_value' "; $result = mysql_query($sql); echo "&lt;select value= 'RoomNo' id ='RoomID' class='form-control'&gt;"; echo "&lt;option&gt;Select Room Number&lt;/option&gt;"; while ($row = mysql_fetch_array($result)) { echo "&lt;option&gt;" . $row['RoomNumber'] . "&lt;/option&gt;"; } echo "&lt;/select&gt;"; ?&gt; &lt;/div&gt; </code></pre>
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    1. COON same page or call that page in form action ?
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    2. COyou can use ajax calls also
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    3. COon the same page.
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