What potential issues can arise when using SSH2 in PHP for file access?

One potential issue when using SSH2 in PHP for file access is that the SSH2 extension may not be enabled on the server. This can be solved by ensuring that the SSH2 extension is installed and enabled on the server where the PHP script is running. 

// Check if SSH2 extension is enabled
if (!extension_loaded('ssh2')) {
    die('SSH2 extension is not enabled. Please enable it on the server.');
}

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