How can the problem of inserting an auto-increment value from one query into another be solved in PHP?

When inserting an auto-increment value from one query into another in PHP, you can retrieve the last inserted ID using the mysqli_insert_id() function after the first query and then use that value in the second query. This ensures that the auto-increment value is properly linked between the two queries. 

// First query to insert data
mysqli_query($conn, "INSERT INTO table1 (column1, column2) VALUES ('value1', 'value2')");

// Get the last inserted ID
$last_id = mysqli_insert_id($conn);

// Second query to use the last inserted ID
mysqli_query($conn, "INSERT INTO table2 (column3, column4) VALUES ('$last_id', 'value3')");

Keywords

PHP auto-increment query database insertion

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