How can PHP developers effectively handle error messages related to MySQL queries not being executed properly in their code?

When a MySQL query fails to execute properly in PHP, developers can effectively handle error messages by using the mysqli_error() function to retrieve the specific error message generated by the last MySQL function call. This allows developers to identify and troubleshoot the issue quickly. 

// Connect to MySQL database
$connection = mysqli_connect("localhost", "username", "password", "database");

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

// Attempt to execute a MySQL query
$query = "SELECT * FROM table";
$result = mysqli_query($connection, $query);

// Check if query was executed successfully
if (!$result) {
    die("Query failed: " . mysqli_error($connection));
}

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

// Close the connection
mysqli_close($connection);

Keywords

PHP MySQL error handling mysqli_error query execution

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