What are some common pitfalls when passing variables between included PHP files?

Common pitfalls when passing variables between included PHP files include variable scope issues and naming conflicts. To avoid these pitfalls, you can use the global keyword to make variables accessible across included files. 

// File: file1.php
$variable = "Hello";
```

```php
// File: file2.php
include 'file1.php';
echo $variable; // Output: Hello

Keywords

variable scope include_once require_once global keyword namespace conflict

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