Extracting function names from a file (with or without regular expressions)

How can I extract all function names fro开发者_Go百科m a PHP file?

The file has many functions that look more or less like the following. Is a regular expression the best way to do it?

public function someFunction(

private function anotherOne(

You could find them with a regular expression:

# The Regular Expression for Function Declarations
$functionFinder = '/function[\s\n]+(\S+)[\s\n]*\(/';
# Init an Array to hold the Function Names
$functionArray = array();
# Load the Content of the PHP File
$fileContents = file_get_contents( 'thefilename.php' );

# Apply the Regular Expression to the PHP File Contents
preg_match_all( $functionFinder , $fileContents , $functionArray );

# If we have a Result, Tidy It Up
if( count( $functionArray )>1 ){
  # Grab Element 1, as it has the Matches
  $functionArray = $functionArray[1];
}

If the PHP file is syntactically correct and only contains function only, you can store the result of get_defined_functions into an array (anyway, is return an array).

include_once the PHP file, compare the latest get_defined_functions with the previous array (like array_diff). Whichever results returned by array_diff are the functions define in the PHP file.

If is an object declaration, the above won't work, although you can make use of function get_class_method, but it is not able to return protected and private methods.

OR

ob_start();
highlight_string(file_get_contents('class.php'));
$html = ob_get_contents();
ob_end_clean();
$dom = new DomDocument;
$dom->loadHTML($html);

You can have a list of DOM with a style attribute you can filter with.

If your PHP file contains a class which are having methods like above as you mentioned, after including file, you can use get_class_methods function of PHP which requires only the classname and it will return the methods of a mentioned class. For more information, see get_class_methods.

However, if you are sure about classes but don't know the names of it then you can use the first get_declared_classes function to get classes, and then you can use the above mentioned function to the methods of those classes.

You can write another PHP file to grep for that, or if you have Linux or Mac OS X, you can use something like:

grep -P "function\s+\w" myfile.php