how to connect an html form with a database code example

Example 1: connect html to mysql database

<?php
// database connection code
// $con = mysqli_connect('localhost', 'database_user', 'database_password','database');

$con = mysqli_connect('localhost', 'root', '','db_connect');

// get the post records
$txtName = $_POST['txtName'];
$txtEmail = $_POST['txtEmail'];
$txtPhone = $_POST['txtPhone'];
$txtMessage = $_POST['txtMessage'];

// database insert SQL code
$sql = "INSERT INTO `tbl_contact` (`Id`, `fldName`, `fldEmail`, `fldPhone`, `fldMessage`) VALUES ('0', '$txtName', '$txtEmail', '$txtPhone', '$txtMessage')";

// insert in database 
$rs = mysqli_query($con, $sql);

if($rs)
{
	echo "Contact Records Inserted";
}

?>

Example 2: connect html to mysql database

<?php
//Step1
 $db = mysqli_connect('localhost','username','password','database_name')
 or die('Error connecting to MySQL server.');
?>

<html>
 <head>
 </head>
 <body>
 <h1>PHP connect to MySQL</h1>
</body>
</html>

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