What is the potential issue with having duplicate variables in PHP includes?

Having duplicate variables in PHP includes can lead to conflicts and unexpected behavior in your code. To solve this issue, you can use the `isset()` function to check if a variable has already been defined before declaring it again in your included file. This way, you can avoid redefining the same variable and prevent conflicts. 

// Check if the variable is already defined before including the file
if (!isset($myVariable)) {
    include 'myFile.php';
}

Keywords

duplicate variables PHP includes variable scope namespace collision code readability

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