How can error handling techniques like "or die" be effectively implemented in PHP scripts to manage database query failures?

When running database queries in PHP scripts, it is essential to handle potential errors that may occur during the execution of the query. One common technique to manage database query failures is to use the "or die" function in PHP. This function allows you to display an error message and terminate the script if the database query fails. 

// Establish a database connection
$connection = mysqli_connect("localhost", "username", "password", "database");

// Check if the connection was successful
if (!$connection) {
    die("Connection failed: " . mysqli_connect_error());
}

// Execute a database query
$query = "SELECT * FROM table";
$result = mysqli_query($connection, $query) or die("Query failed: " . mysqli_error($connection));

// Process the query result
while ($row = mysqli_fetch_assoc($result)) {
    // Do something with the data
}

// Close the database connection
mysqli_close($connection);

Keywords

error handling or die database query PHP scripts failure.

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