phpstorm: add page (#3117)

pages/common/phpstorm.md

@@ -0,0 +1,20 @@
+# phpstorm
+
+> A cross-platform IDE for PHP based on the JetBrains IntelliJ platform.
+> More information: <https://jetbrains.com/phpstorm>.
+
+- Open a specific directory:
+
+`phpstorm {{path/to/directory}}`
+
+- Open a file:
+
+`phpstorm {{path/to/file}}`
+
+- Open a file at a specific line:
+
+`phpstorm --line {{line_number}} {{path/to/file}}`
+
+- View the differences between two files:
+
+`phpstorm diff {{path/to/left_file}} {{path/to/right_file}}`