What is the purpose of the SQL query in the PHP script?

The purpose of the SQL query in the PHP script is to retrieve data from a database based on certain criteria. This query is essential for fetching specific information that is needed for the PHP script to process or display. 

// Example PHP script with SQL query to retrieve data from a database
<?php
// Connect to database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database";

$conn = new mysqli($servername, $username, $password, $dbname);

// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

// SQL query to retrieve data
$sql = "SELECT * FROM table_name WHERE condition = 'value'";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
    // Output data of each row
    while($row = $result->fetch_assoc()) {
        echo "Column1: " . $row["column1"]. " - Column2: " . $row["column2"]. "<br>";
    }
} else {
    echo "0 results";
}

$conn->close();
?>

Keywords

SQL query PHP script purpose database interaction data retrieval

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