In what scenarios would a server deny access to an external file when trying to access it using PHP?

When trying to access an external file using PHP, a server may deny access due to security restrictions or file permissions. To solve this issue, you can try to adjust the file permissions or use PHP functions like `file_get_contents()` or `fopen()` with appropriate parameters to access the file. 

// Example code using file_get_contents to access an external file
$file = 'http://www.example.com/file.txt';
$contents = file_get_contents($file);
echo $contents;

Keywords

server access control external file PHP denial

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