How can including external files affect the functionality of PHP scripts, specifically when using the "INSERT INTO" command?

Including external files in PHP scripts can affect the functionality of the "INSERT INTO" command if the external file contains conflicting database connection or query code. To solve this issue, ensure that the external file does not contain any database connection or query code related to the same database tables being affected by the "INSERT INTO" command in the main script. 

// main_script.php
include 'external_file.php';

// Your "INSERT INTO" command here
$insert_query = "INSERT INTO table_name (column1, column2) VALUES ('value1', 'value2')";
// Execute the query
mysqli_query($connection, $insert_query);
```
```php
// external_file.php

// Do not include any database connection or query code related to the same database tables being affected by the "INSERT INTO" command in the main script.

Keywords

PHP external files INSERT INTO functionality scripts

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