What potential issues could arise when using the ".include()" function in PHP?

One potential issue that could arise when using the ".include()" function in PHP is the possibility of including files from untrusted sources, which can lead to security vulnerabilities such as code injection or execution of malicious scripts. To mitigate this risk, it is important to sanitize and validate the file paths before including them. 

// Sanitize and validate the file path before including
$file = 'path/to/your/file.php';

if (strpos($file, '..') === false && file_exists($file)) {
    include $file;
} else {
    // Handle error or fallback
}

Keywords

include PHP file inclusion security vulnerability remote code execution

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