What does res mean in php

In PHP, res is a variable used to store the MySQL database query result set, which can be obtained using the mysqli_query() function and traversed through functions such as mysqli_fetch_array(), mysqli_fetch_assoc(), and finally mysqli_free_result() Function releases the connection to the database server.

res

What is res# in PHP ##?

In PHP,

res is a variable used to store the result set of a MySQL database query. It is a resource type that represents a resource pointing to a MySQL server connection.

How to useres

To obtain the query result set, you can use the

mysqli_query() function, as shown below:

$res = mysqli_query($conn, "SELECT * FROM users");

Where:

• $conn is the connection handle pointing to the MySQL server.
• "SELECT * FROM users" is the query to be executed.

mysqli_query() The function returns a res variable containing the query result set. Operations on

res

You can use various functions to traverse and operate

res, including:

• mysqli_fetch_array(): Gets a row in the result set as an associative array or numeric array.
• mysqli_fetch_assoc(): Get a row in the result set as an associative array.
• mysqli_fetch_row(): Get a row in the result set as a numeric array.
• mysqli_fetch_object(): Get a row in the result set as an object.

Releaseres

Use

mysqli_free_result() The function release is associated with res resources, as follows:

mysqli_free_result($res);

Release

res is very important because it releases the connection to the database server.

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