phan: add page (#4376)

pages/common/phan.md

@@ -0,0 +1,32 @@
+# phan
+
+> A static analysis tool for PHP.
+> More information: <https://github.com/phan/phan>.
+
+- Generate a `.phan/config.php` in the current directory:
+
+`phan --init`
+
+- Generate a Phan configuration file using a specific level (1 being strictest to 5 being the least strict):
+
+`phan --init --init-level {{level}}`
+
+- Analyse the current directory:
+
+`phan`
+
+- Analyse one or more directories:
+
+`phan --directory {{path/to/directory}} --directory {{path/to/another_directory}}`
+
+- Specify a config file (defaults to `.phan/config.php`):
+
+`phan --config-file {{path/to/config.php}}`
+
+- Specify the output mode:
+
+`phan --output-mode {{text|verbose|json|csv|codeclimate|checkstyle|pylint|html}}`
+
+- Specify the number of parallel processes:
+
+`phan --processes {{number_of_processes}}`