$modules = getModulesOnDisk(); print_r($modules);
if (in_array("xml", getModulesOnDisk())) { echo "The XML module is installed."; } else { echo "The XML module is not installed."; }This code checks if the "xml" module is installed on the server. If it is, the code will output "The XML module is installed."; otherwise, it will output "The XML module is not installed.". Package library: This function is part of the PHP language itself and does not belong to any particular package or library.