Generate documentation for PHP Code using phpDocumentor

What is phpDocumentor?
phpDocumentor is the simple and best tool to generate API documentation for PHP source code. 

Downloading & installing phpDocumentor:
There are several dependencies to install phpDocumentor you can find them on official website i.e., here

To install phpDocumentor using PEAR type below command

• In windows, run command prompt as administrator. Goto xampp/php folder and type
  

  pear channel-discover pear.phpdoc.org
  pear install phpdoc/phpDocumentor

• In linux, open terminal and type (if install xampp for linux then goto xampp/bin folder)
  

  pear channel-discover pear.phpdoc.org
  pear install phpdoc/phpDocumentor

Generate API using phpDocumentor:

• In windows, goto  phpdoc.bat folder and run phpdoc  command for source directory to destination

   phpdoc -d <source directory of php code> -t <destination directory>

• In Linux, goto [phpdocumentor installation folder]/bin/ and run command

   phpdoc -d <source directory of php> -t <destination directory>

Note:

If in case, installation method through PEAR gives you below error. Try downloading phar and proceed

Fatal error: Uncaught TypeError: Argument 1 passed to Monolog\ErrorHandler::handleException() must be an instance of Exception...

Download .phar from here
To generate API run the below command from php directory with the location of .phar file

php phpDocumentor.phar -d <source directory of php code> -t <destination directory>

If you find any error related to Graphviz, download and install software from here. Set the environment variable for Graphviz/bin directory for 'dot' executable file.