What potential issues can arise when using __FILE__ and __LINE__ within included files in PHP?

When using __FILE__ and __LINE__ within included files in PHP, the values returned may not be what you expect because they will reflect the file and line number of the included file, not the original file that included it. To solve this issue, you can pass the __FILE__ and __LINE__ values as parameters to the included file and use them within the included file. 

// Original file
$includedFile = __FILE__;
$includedLine = __LINE__;
include 'included.php';

// included.php
echo "This code is included from $includedFile on line $includedLine";

Keywords

__FILE__ __LINE__ included files PHP error types

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