How can including PHP files in different locations affect the display of error messages in a web application?

Including PHP files in different locations can affect the display of error messages in a web application because error reporting settings may vary in different files. To ensure consistent error reporting across all included files, you can set the error reporting level and display errors directive in a central configuration file that is included in all other PHP files. 

```php
// config.php
error_reporting(E_ALL);
ini_set('display_errors', 1);
```

Include the config.php file in all other PHP files to ensure consistent error reporting settings:

```php
// index.php
include 'config.php';
// Your code here
```

This approach ensures that error messages will be displayed consistently throughout the web application.

Keywords

PHP files include error messages web application display

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