What resources or tutorials can help beginners understand the basics of executing SQL queries in PHP using mysqli?

To understand the basics of executing SQL queries in PHP using mysqli, beginners can refer to online tutorials, official documentation, and educational websites like W3Schools. These resources provide step-by-step guides, examples, and explanations on how to connect to a database, perform queries, and handle the results using mysqli functions in PHP. 

<?php
// Create a connection to the database
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "database_name";
$conn = new mysqli($servername, $username, $password, $dbname);

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

// Execute a SQL query
$sql = "SELECT * FROM table_name";
$result = $conn->query($sql);

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

// Close the connection
$conn->close();
?>

Keywords

SQL queries PHP mysqli tutorials beginners

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