Delete row in table - MySQL, PHP, HTML - php

Question

I have an HTML table displaying data from a MySQL database. I want to add a "delete row" button, so that with a click I can delete a row from the database table (data linked to the Member's ID).
I can see what the SQL should be doing, but I don't know how to implement it with PHP.
I also have a search page where you can search for a member by inputting their first name and I want to add the same delete function to that search page too.
But for now I want to get it working on an HTML table that shows all the data first!
Here is my code (minus the connecting and disconnecting from database and all that):
// Retrieve Member Details
$sql = "SELECT MemberID, FirstName, Surname, DOB, Address, County,
PostCode, MobileNo, Email FROM Members";
$result = mysql_query($sql, $connection);
//create table
echo "<table>";
// Loop through the data and then display chosen data
echo "<h2>Member Details</h2>";
echo "<tr><th>Member ID</th><th>First Name</th><th>Surname</th>
<th>DOB</th><th>Address</th><th>County</th><th>Post Code</th>
<th>Mobile Number</th><th>Email</th><tr>";
while($a_row = mysql_fetch_assoc($result))
echo "<tr><td>" . $a_row['MemberID']
. "</td><td>" . $a_row['FirstName']
. "</td><td>" . $a_row['Surname']
. "</td><td>" . $a_row['DOB']
. "</td><td>" . $a_row['Address']
. "</td><td>" . $a_row['County']
. "</td><td>" . $a_row['PostCode']
. "</td><td>" . $a_row['MobileNo']
. "</td><td>" . $a_row['Email']
. "</td><tr>";
//close table
echo "</table>";
Code for Search page:
<?php
// Connecting to Database Server
$connection = mysql_connect("localhost", "1520621",
// If connection cannot be made to Database Server
if (!$connection)
die("Cannot connect to Database");
// Select the database
mysql_select_db("db1520621", $connection)
// If Database cannot be found
or die("Cannot find Database");
// SQL
// Select all data from Members table where FirstName matches that which is inserted into searchName using POST
$sql ="SELECT * FROM Members";
$sql.=" WHERE FirstName=\"".$_POST["searchName"]."\"";
// Execute the query
$queryResult=mysql_query($sql);
//Check for errors and display following messages if there is
if (mysql_error())
{
echo "Problem with Query<br>";
echo "The following error message was returned from MySQL:<br>";
echo mysql_error();
exit;
}
//Create table
echo "<table>";
echo "<h2>Member Details</h2>";
echo "<tr><th>First Name</th><th>Surname</th><th>DOB</th><th>Address</th><th>County</th><th>Post Code</th><th>Mobile Number</th><th>Email</th><tr>";
// If no results found show message. If results found, loop if there is more than 1 result
if (mysql_num_rows($queryResult)==0)
{
echo "No members with that name";
}
else
{
while ($dbRecord=mysql_fetch_array($queryResult))
{
echo "<tr><td>".$dbRecord["FirstName"]."</td><td>".$dbRecord["Surname"]."</td><td>".$dbRecord["DOB"]."</td><td>".$dbRecord["Address"]."</td><td>".$dbRecord["County"]."</td><td>".$dbRecord["PostCode"]."</td><td>".$dbRecord["MobileNo"]."</td><td>".$dbRecord["Email"]."</td></tr>";
}
}
// Close connection to Database
mysql_close($connection);
?>

Answer 1

You should be using PHP Data Objects (http://php.net/manual/en/ref.pdo-mysql.php) or MySQLi (http://php.net/manual/en/book.mysqli.php).
The Ending <tr> table on the echo line is not closed (</tr>) which might be messing with the HTML output.
SQL query for deleting:
$query = sprintf("DELETE FROM Members WHERE MemberID = '%s'",
mysql_real_escape_string($member_id));

Answer 2

Here is the full code to delete row from database. First you have to add delete link and pass member id to be deleted.
// Check if delete button is clicked and delete respective row
if(isset($_GET['DeleteID']) AND !empty($_GET['DeleteID']))
mysql_query("DELETE FROM Members where MemberID = '".$_GET['DeleteID']."'", $connection);
// Retrieve Member Details
$sql = "SELECT MemberID, FirstName, Surname, DOB, Address, County, PostCode, MobileNo, Email FROM Members";
$result = mysql_query($sql, $connection);
//create table
echo "<table>";
// Loop through the data and then display chosen data
echo "<h2>Member Details</h2>";
echo "<tr><th>Member ID</th><th>First Name</th><th>Surname</th><th>DOB</th><th>Address</th><th>County</th><th>Post Code</th><th>Mobile Number</th><th>Email</th><th>Delete</th><tr>";
while($a_row = mysql_fetch_assoc($result)){
echo "<tr><td>" . $a_row['MemberID'] . "</td><td>" . $a_row['FirstName'] . "</td><td>" . $a_row['Surname'] . "</td><td>" . $a_row['DOB'] . "</td><td>" . $a_row['Address'] . "</td><td>" . $a_row['County'] . "</td><td>" . $a_row['PostCode'] . "</td><td>" . $a_row['MobileNo'] . "</td><td>" . $a_row['Email'] . "</td>";
echo "<td>Delete</td></tr>";
}
//close table
echo "</table>";
Search page code
<?php
// Connecting to Database Server
$connection = mysql_connect("localhost", "1520621", "w9p1n5");
// If connection cannot be made to Database Server
if (!$connection)
die("Cannot connect to Database");
// Select the database
mysql_select_db("db1520621", $connection)
// If Database cannot be found
or die("Cannot find Database");
// SQL
if(isset($_GET['DeleteID']) AND !empty($_GET['DeleteID']))
mysql_query("DELETE FROM Members where MemberID = '".$_GET['DeleteID']."'", $connection);
// Select all data from Members table where FirstName matches that which is inserted into searchName using POST
$sql ="SELECT * FROM Members";
$sql.=" WHERE FirstName=\"".$_REQUEST["searchName"]."\"";
// Execute the query
$queryResult=mysql_query($sql);
//Check for errors and display following messages if there is
if (mysql_error())
{
echo "Problem with Query<br>";
echo "The following error message was returned from MySQL:<br>";
echo mysql_error();
exit;
}
//Create table
echo "<table>";
echo "<h2>Member Details</h2>";
echo "<tr><th>First Name</th><th>Surname</th><th>DOB</th><th>Address</th><th>County</th><th>Post Code</th><th>Mobile Number</th><th>Email</th><tr>";
// If no results found show message. If results found, loop if there is more than 1 result
if (mysql_num_rows($queryResult)==0)
{
echo "No members with that name";
}
else
{
while ($dbRecord=mysql_fetch_array($queryResult))
{
echo "<tr><td>".$dbRecord["FirstName"]."</td><td>".$dbRecord["Surname"]."</td><td>".$dbRecord["DOB"]."</td><td>".$dbRecord["Address"]."</td><td>".$dbRecord["County"]."</td><td>".$dbRecord["PostCode"]."</td><td>".$dbRecord["MobileNo"]."</td><td>".$dbRecord["Email"]."</td>";
echo "<td>Delete</td></tr>";
}
}
// Close connection to Database
mysql_close($connection);
?>