Jaribu this one

    <?php
     /* Connection string which i assume */
      if($conn === false)
      {
        exit("<pre>" . print_r(sqlsrv_errors(), true) . "</pre>");
      }
      if (isset($_REQUEST['action']) && $_REQUEST['action'] == 'add-entry')
      {
        $your variable a= $_REQUEST['formvalue a'];
        $your variable b= $_REQUEST['formvalue b'];
        $your variable c= $_REQUEST['formvalue c'];

        $sql = "INSERT INTO entries (a, b, c) VALUES (?, ?, ?)";
        $stmt = sqlsrv_query($conn, $sql, array($your variablea, $your variableb, $your variablec));

        if ($stmt === false)
        {
          echo "<p>An error has occured.</p>";
        }
        else
        {
          echo "<p>New entry created.</p>";
        }
        sqlsrv_free_stmt($stmt);
      }
    ?>
    <h2>title</h2>
    <form action="" method="post">
      <div>
        <?php
          $sql = "SELECT * FROM (database).(table)";
          $stmt = sqlsrv_query($conn, $sql);

          if ($stmt === false)
          {
            print_r(sqlsrv_errors());
          }
        ?>
        <label>Project:</label> <select name="project">
        <?php
          while($row = sqlsrv_fetch_array($stmt))
          {
               echo "<option value=\"$row[id]\">$row[name]</option>";
          }
          sqlsrv_free_stmt($stmt);
        ?>
        </select>
      </div>
      <div><label>a:</label> <input type="text" name="a" /></div>
      <div><label>b:</label> <input type="text" name="b" /></div>
      <div><input type="submit" value="Save" /></div>
      <input type="hidden" name="action" value="add-entry" />
    </form>
    <?php
      sqlsrv_close($conn);
    ?>
</body>
</html>