Add an option to print to stderr as files are being scanned

README.md

@@ -67,6 +67,13 @@ Give a try, use the included `testcases.php` to generate a report:
 		*Example: -x="php,inc"*
 ```
 
+**-p**
+```
+	Print progress output.
+	Print a message to stderr as each file is being analyzed.
+		*Example: -p*
+```
+
 **--php**
 ```
 	File path to the PHP binary to use for syntax checking.

classes/options.php

@@ -85,7 +85,14 @@ class options {
 			'description'		=> 'A comma separated list of file extensions to consider as PHP files.  Defaults to "php"',
 			'example'			=> '-x="php,inc"',
 			'comma_delimited'	=> true
-		]
+		],
+		'p'	=> [
+			'option'		=> self::OPTION_OPTIONAL,
+			'value' 		=> self::VALUE_NONE,
+			'comment'		=> 'Print progress output.',
+			'description'	=> 'Print a message to stderr as each file is being analyzed.',
+			'example'		=> '-p',
+		],
 	];
 
 	/**

mar.php

@@ -113,8 +113,12 @@ private function run() {
 		} else {
 			$checkSyntax = false;
 		}
+		$print_progress = $this->options->getOption('p');
 
 		while (($lines = $this->scanner->scanNextFile()) !== false) {
+			if ($print_progress) {
+				fprintf(STDERR, "Scanning '%s'\n", $filePath);
+			}
 			$totalFiles++;
 
 			//Check syntax and assign a line to grab if needed.