mysql - Deleting a data in Database using php -


i need delete data on database using php code, have written code there error message. here php code(del.php):-

<!doctype html> <html> <body> <?php  $conn = mysql_connect('localhost', 'root','');  if ($conn->connect_error) {  die("connection failed: " . $conn->connect_error); }   $sql = "delete register name='' ";  if ($conn->query($sql) === true) {   echo "record deleted successfully"; } else {      echo "error deleting record: " . $conn->error; } $conn->close(); ?> </body> </html>

the database name 'selva' , table name 'register', in database file names "name,email,contact,address", need delete name or email or contact . how delete!!

//this delete whole row:

<!doctype html> <html> <body> <?php  $servername = "localhost"; $username = "root"; $password = "your_password"; // add pw here $dbname = "selva";  // create connection $conn = new mysqli($servername, $username, $password, $dbname);  // check connection if ($conn->connect_error) {     die("connection failed: " . $conn->connect_error); } //this delete whole row $sql = "delete register 1 ";  if ($conn->query($sql) === true) {     echo "record deleted successfully"; } else {     echo "error deleting record: " . $conn->error; } $conn->close(); ?> </body> </html>

//this delete columns set here:

<!doctype html> <html> <body> <?php  $servername = "localhost"; $username = "root"; $password = "your_password"; // add pw here $dbname = "selva";  // create connection $conn = new mysqli($servername, $username, $password, $dbname);  // check connection if ($conn->connect_error) {     die("connection failed: " . $conn->connect_error); } $sql = "alter table register drop name, drop email; drop contact; ";  if ($conn->query($sql) === true) {     echo "record deleted successfully"; } else {     echo "error deleting record: " . $conn->error; } $conn->close(); ?> </body> </html>


hope :)


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