What are the potential issues that can arise when including a PHP file in another file?

One potential issue that can arise when including a PHP file in another file is variable scope conflicts. To solve this issue, you can use functions to encapsulate the included file's code and prevent variable scope conflicts. 

// File to include
// file_to_include.php

$variable = "Hello";

// Function to encapsulate code
function include_file() {
    include 'file_to_include.php';
}
```

```php
// Main file
// main_file.php

$variable = "World";

// Include the file using the function
include_file();

echo $variable; // Output: World

Keywords

include require namespace scope variable collision

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