What potential conflicts can arise when using mysql_insert_id in PHP for retrieving the last inserted ID?

When using mysql_insert_id in PHP for retrieving the last inserted ID, potential conflicts can arise in a multi-user environment where multiple inserts are happening simultaneously. This can result in the wrong ID being returned if another insert occurs between the insert and the call to mysql_insert_id. To solve this issue, it is recommended to use the LAST_INSERT_ID() function within the same SQL query that inserts the data, ensuring the correct ID is returned. 

// Insert data into the database and retrieve the last inserted ID
$query = "INSERT INTO table_name (column1, column2) VALUES ('value1', 'value2');";
$result = mysqli_query($connection, $query);

// Retrieve the last inserted ID
$query = "SELECT LAST_INSERT_ID() as last_id;";
$result = mysqli_query($connection, $query);
$row = mysqli_fetch_assoc($result);
$last_inserted_id = $row['last_id'];

// Use the retrieved last inserted ID as needed
echo "Last inserted ID: " . $last_inserted_id;

Keywords

mysql_insert_id PHP conflicts last inserted ID retrieval

Related Questions