How To Get the Value from a Database using PHP Key Pair


To get the value from a database using PHP key pair, you can use the SELECT statement in SQL and fetch the result in PHP using MySQLi extension.

Here's an example using MySQLi:

<?php

// Set up database connection
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database_name";

$conn = mysqli_connect($servername, $username, $password, $dbname);

// Check connection

if (!$conn) {

    die("Connection failed: " .mysqli_connect_error());

}

// Define key

$key = "my_key";

// Query to get value from key

$sql = "SELECT value FROM my_table WHERE key_name = '$key'";

$result = mysqli_query($conn, $sql);

// Check if result exists and fetch the value

if (mysqli_num_rows($result) > 0) {

    $row = mysqli_fetch_assoc($result);

    $value = $row["value"];

    echo "Value for key $key is $value";

} else {

    echo "No result found for key $key";

}

// Close database connection

mysqli_close($conn);

?>

In this example, replace my_key, my_table, key_name, and value with your own key-value pairs and table/column names.

Note: It's important to sanitize user input to prevent SQL injection attacks. You can use prepared statements with parameter binding to achieve this

       

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