How can the use of mysql_error() improve error handling in PHP scripts, especially when dealing with database queries?

When dealing with database queries in PHP scripts, errors can occur that may not be immediately apparent. Using the mysql_error() function can help improve error handling by providing detailed information about any errors that occur during the execution of a query. This can help developers quickly identify and resolve issues, leading to more robust and reliable scripts. 

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

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

// Execute query
$query = "SELECT * FROM table";
$result = mysqli_query($connection, $query);

// Check for errors
if (!$result) {
    die("Query failed: " . mysqli_error($connection));
}

// Process results
while ($row = mysqli_fetch_assoc($result)) {
    // Process each row
}

// Close connection
mysqli_close($connection);

Keywords

mysql_error() error handling PHP scripts database queries improve

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