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docs/FAQ.md

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+# Mongoose FAQ
+
+### PHP doesn't work: getting empty page, or 'File not found' error
+
+The reason for that is wrong paths to the interpreter. Remember that with PHP,
+correct interpreter is `php-cgi.exe` (`php-cgi` on UNIX). Solution: specify
+full path to the PHP interpreter, e.g.:
+
+    mongoose -cgi_interpreter /full/path/to/php-cgi
+
+### Mongoose fails to start
+
+If Mongoose exits immediately when run, this
+usually indicates a syntax error in the configuration file
+(named `mongoose.conf` by default) or the command-line arguments.
+Syntax checking is omitted from Mongoose to keep its size low. However,
+the Manual should be of help. Note: the syntax changes from time to time,
+so updating the config file might be necessary after executable update.
+
+### Embedding with OpenSSL on Windows might fail because of calling convention
+
+To force Mongoose to use `__stdcall` convention, add `/Gz` compilation
+flag to the Visual Studio project settings.