Create more documentation (#7627)

* Documentation, format class, no modification.

app/fax_queue/resources/service/fax_queue.php

@@ -37,6 +37,16 @@
 	//echo "pid_file: ".$pid_file."\n";
 
 //function to check if the process exists
+	/**
+	 * Checks if a process exists.
+	 *
+	 * This function checks if a process with the specified PID file exists, and returns true if it does,
+	 * or false otherwise. If no PID file is provided, the function defaults to returning false.
+	 *
+	 * @param string|false $file The path to the PID file of the process to check for, or false to default to not checking any process.
+	 *
+	 * @return bool True if a process with the specified PID exists, false otherwise.
+	 */
 	function process_exists($file = false) {
 
 		//set the default exists to false