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I am new to php and html, I am trying to make a search function where you can search by a persons firstname or lastname but I am getting an error. the error is Notice: Undefined variable: searchq in C:\wamp\www\search2.php on line 17. Can anyone help me please <title>Applicant Data view</title> <p> <center><img src="cyberwarfareimage1.png" alt="Squadron logo" style="width:200px;height:200px" style="middle"></center> <table border="1"> <tr> <td><a href="index.php"> Home Page </a></td> <td><a href="administratorhomepage.html">Administrator Home Page </a></td> <td><a href="viewhomepage.html">View Home Page </a></td> </table> </p> <?php include "connection.php"; $sql = ("SELECT * FROM applicant WHERE `Firstname` LIKE $searchq OR `Lastname` LIKE $searchq") or die("Could Not Search"); $result = $dbhandle->query($sql); echo "<table border='1'> <tr> <th>Applicant Id</th> <th>Firstame</th> <th>Lastname</th> <th>Address</th> <th>Date Of Birth</th> <th>Contact Number</th> <th>Next Of Kin</th> <th>Next Of Kin Address</th> <th>Vetting Date</th> <th>Clearance Expiry</th> <th>Current Employer</th> <th>Date Applied</th> <th>Resubmitting</th> <th>Number Of Previous Attempts</th> <th>Why</th> <th>Qualificaton 1</th> <th>Date Completed</th> <th>Expiry Date</th> <th>Qualificaton 2</th> <th>Date Completed</th> <th>Expiry Date</th> <th>Qualificaton 3</th> <th>Date Completed</th> <th>Expiry Date</th> <th>Qualificaton 4</th> <th>Date Completed</th> <th>Expiry Date</th> <th>Qualificaton 5</th> <th>Date Completed</th> <th>Expiry Date</th> <th>Qualificaton 6</th> <th>Date Completed</th> <th>Expiry Date</th> <th>Qualificaton 7</th> <th>Date Completed</th> <th>Expiry Date</th> <th>Qualificaton 8</th> <th>Date Completed</th> <th>Expiry Date</th> <th>Qualificaton 9</th> <th>Date Completed</th> <th>Expiry Date</th> <th>Qualificaton 10</th> <th>Date Completed</th> <th>Expiry Date</th> </tr>"; if(isset ($_POST["submit"])) { $searchq = $_POST[`submit`]; $searchq = preg_replace("#[^a-z]#i","",$searchq); if ($result->num_rows > 0) { // output data of each row while($row = mysqli_fetch_array($result)) { echo "<tr>"; echo "<td>" . $row['Applicant_ID'] . "</td>"; echo "<td>" . $row['Firstname'] . "</td>"; echo "<td>" . $row['Lastname'] . "</td>"; echo "<td>" . $row['Address'] . "</td>"; echo "<td>" . $row['DOB'] . "</td>"; echo "<td>" . $row['Telephone_No'] . "</td>"; echo "<td>" . $row['NOK'] . "</td>"; echo "<td>" . $row['NOK_Address'] . "</td>"; echo "<td>" . $row['Vetting_Date'] . "</td>"; echo "<td>" . $row['Clearance_Expiry'] . "</td>"; echo "<td>" . $row['Current_Employer'] . "</td>"; echo "<td>" . $row['Date_applied'] . "</td>"; echo "<td>" . $row['Resubmission'] . "</td>"; echo "<td>" . $row['Number_of_Attempts'] . "</td>"; echo "<td>" . $row['Why'] . "</td>"; echo "<td>" . $row['Qual_1'] . "</td>"; echo "<td>" . $row['Date_Completed_1'] . "</td>"; echo "<td>" . $row['Run_out_date_1'] . "</td>"; echo "<td>" . $row['Qual_2'] . "</td>"; echo "<td>" . $row['Date_Completed_2'] . "</td>"; echo "<td>" . $row['Run_out_date_2'] . "</td>"; echo "<td>" . $row['Qual_3'] . "</td>"; echo "<td>" . $row['Date_Completed_3'] . "</td>"; echo "<td>" . $row['Run_out_date_3'] . "</td>"; echo "<td>" . $row['Qual_4'] . "</td>"; echo "<td>" . $row['Date_Completed_4'] . "</td>"; echo "<td>" . $row['Run_out_date_4'] . "</td>"; echo "<td>" . $row['Qual_5'] . "</td>"; echo "<td>" . $row['Date_Completed_5'] . "</td>"; echo "<td>" . $row['Run_out_date_5'] . "</td>"; echo "<td>" . $row['Qual_6'] . "</td>"; echo "<td>" . $row['Date_Completed_6'] . "</td>"; echo "<td>" . $row['Run_out_date_6'] . "</td>"; echo "<td>" . $row['Qual_7'] . "</td>"; echo "<td>" . $row['Date_Completed_7'] . "</td>"; echo "<td>" . $row['Run_out_date_7'] . "</td>"; echo "<td>" . $row['Qual_8'] . "</td>"; echo "<td>" . $row['Date_Completed_8'] . "</td>"; echo "<td>" . $row['Run_out_date_8'] . "</td>"; echo "<td>" . $row['Qual_9'] . "</td>"; echo "<td>" . $row['Date_Completed_9'] . "</td>"; echo "<td>" . $row['Run_out_date_9'] . "</td>"; echo "<td>" . $row['Qual_10'] . "</td>"; echo "<td>" . $row['Date_Completed_10'] . "</td>"; echo "<td>" . $row['Run_out_date_10'] . "</td>"; echo "</tr>"; } echo "</table>"; } else { echo "0 results"; } } $dbhandle->close(); ?>