How to make a MySQL PHP request

Build MySQL queries with PHP: learn how to execute simple & complex queries with an example.

Making a MySQL PHP Request

To make a MySQL PHP request, the user must first connect to the MySQL database using the PHP mysqli_connect() function. This function requires four parameters: the server, username, password and database name. Here is an example of the code for connecting to a MySQL database:

$server = "localhost"; 
$username = "root"; 
$password = "password";
$database = "my_database";

$connection = mysqli_connect($server, $username, $password, $database);

if (!$connection) {
    die("Connection failed: " . mysqli_connect_error());
}

Once the user has established a connection to the database, they can execute a MySQL query against the database. This is done using the PHP mysqli_query() function. This function takes two parameters: the connection variable and the query string. Here is an example of a MySQL query using the mysqli_query() function:

$sql = "SELECT * FROM customers";
$result = mysqli_query($connection, $sql);

This query will select all columns from the customers table. The result of the query is stored in the $result variable. The user can then fetch the data from the query result using the mysqli_fetch_assoc() function. This function takes the $result variable as a parameter and returns an associative array containing all the data from the query. Here is an example of how to use the mysqli_fetch_assoc() function to fetch data from the query result:

while($row = mysqli_fetch_assoc($result)) {
    echo "Name: " . $row['name'] . " - Email: " . $row['email'];
    echo "
";
}

This code will loop through all the rows in the query result and print out the name and email for every customer. Finally, the user should close the connection to the database when they are done using the mysqli_close() function. This function takes the connection variable as a parameter. Here is an example of how to use the mysqli_close() function:

mysqli_close($connection);

In summary, making a MySQL PHP request is a relatively simple task. The user must first connect to the database using the mysqli_connect() function. Then they can execute a query against the database using the mysqli_query() function. Finally, they can fetch the data from the query result using the mysqli_fetch_assoc() function and close the connection to the database using the mysqli_close() function.