How can the use of mysql_query() impact the reliability of mysql_insert_id() in PHP?

When using mysql_query() in PHP, it is important to note that it has been deprecated and replaced with mysqli or PDO for better security and performance. The use of mysql_query() can impact the reliability of mysql_insert_id() as it may not always return the correct last inserted ID due to potential race conditions or multiple queries being executed simultaneously. To ensure the reliability of mysql_insert_id(), it is recommended to switch to mysqli or PDO and use their respective functions to retrieve the last inserted ID. 

// Connect to MySQL using mysqli
$mysqli = new mysqli("localhost", "username", "password", "database");

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

// Perform a query
$mysqli->query("INSERT INTO table_name (column_name) VALUES ('value')");

// Get the last inserted ID
$last_id = $mysqli->insert_id;

// Close the connection
$mysqli->close();

// Use $last_id as needed

Keywords

mysql_query mysql_insert_id reliability PHP impact

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