phpspec: add page (#3123)

pages/common/phpspec.md

@@ -0,0 +1,32 @@
+# phpspec
+
+> A Behaviour Driven Development tool for PHP.
+> More information: <https://phpspec.net>.
+
+- Create a specification for a class:
+
+`phpspec describe {{class_name}}`
+
+- Run all specifications in the "spec" directory:
+
+`phpspec run`
+
+- Run a single specification:
+
+`phpspec run {{path/to/class_specification_file}}`
+
+- Run specifications using a specific configuration file:
+
+`phpspec run -c {{path/to/configuration_file}}`
+
+- Run specifications using a specific bootstrap file:
+
+`phpspec run -b {{path/to/bootstrap_file}}`
+
+- Disable code generation prompts:
+
+`phpspec run --no-code-generation`
+
+- Enable fake return values:
+
+`phpspec run --fake`