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copied!<p>You basically require two tables, with this structure</p> <p>table_categories</p> <pre><code>_____________________________ | id | title | -----------+---------------+ </code></pre> <p>table_category_detail</p> <pre><code>______________________________________________ | id | categoryId | articleId | -----------+---------------+------------------ </code></pre> <p>To extract all categories, select all from the <code>table_categories</code> and put up into the select menu with <code>mutiple</code> selection enabled.</p> <p>Next, when posted get the selected box values and insert into <code>table_category_detail</code> one by one</p> <p>This is how you create a select box</p> <pre><code>$query = "SELECT * FROM table_categories"; $result = mysql_query($query); echo '<select multiple="multiple">'; while($row = mysql_fetch_assoc($result)) { echo '<option value="'.$row['id'].'">'.$row['title'].'</option>'; } echo "</select>"; </code></pre> <p>Or a Multiple Check Box</p> <pre><code>while($row = mysql_fetch_assoc($result)) { echo '<input type="checkbox" name="selcats[]" value="'.$row['id'].'"> ' .$row['title']; } </code></pre> <p><strong>After the post:</strong></p> <pre><code> // Here write codes to insert the article first $articleId = mysql_insert_id(); //get the id $values = $_POST['selcats']; foreach($values as $value) { $query = "INSERT into `table_category_detail` VALUES(NULL, $value, $articleId)"; $result = mysql_query($result); } </code></pre>

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