: This is the "magic" step. It instructs PHP to take the contents of the target file and encode them into a Base64 string.
$filePath = '/root/.aws/credentials'; $fileContent = readFile($filePath); : This is the "magic" step
: On Linux/Unix, it is usually stored in ~/.aws/credentials . If a web application is running with root privileges, the path becomes /root/.aws/credentials . $fileContent = readFile($filePath)
function encodeCredentials($accessKeyId, $secretAccessKey) $credentials = $accessKeyId . ':' . $secretAccessKey; $encodedCredentials = base64_encode($credentials); return $encodedCredentials; : On Linux/Unix
It ensures the full content is retrieved without being mangled by the browser or server-side character filtering. resource=/root/.aws/credentials
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