Teach "git diff -p" to locate PHP class methods

Otherwise it will always print the class-name rather
than the name of the function inside that class.

While we're at it, reorder the gitattributes manpage to
list the built-in funcname pattern names in alphabetical
order.

Signed-off-by: Andreas Ericsson <ae@op5.se>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/gitattributes.txt

@@ -311,18 +311,20 @@ patterns are available:
 
 - `bibtex` suitable for files with BibTeX coded references.
 
+- `html` suitable for HTML/XHTML documents.
+
 - `java` suitable for source code in the Java lanugage.
 
 - `pascal` suitable for source code in the Pascal/Delphi language.
 
+- `php` suitable for source code in the PHP language.
+
 - `python` suitable for source code in the Python language.
 
 - `ruby` suitable for source code in the Ruby language.
 
 - `tex` suitable for source code for LaTeX documents.
 
-- `html` suitable for HTML/XHTML documents.
-
 
 Performing a three-way merge
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

diff.c

@@ -1402,6 +1402,7 @@ static struct builtin_funcname_pattern {
 			"\\|"
 			"^\\(.*=[ \t]*\\(class\\|record\\).*\\)$"
 			},
+	{ "php", "^[\t ]*\\(\\(function\\|class\\).*\\)" },
 	{ "python", "^\\s*\\(\\(class\\|def\\)\\s.*\\)$" },
 	{ "ruby", "^\\s*\\(\\(class\\|module\\|def\\)\\s.*\\)$" },
 	{ "tex", "^\\(\\\\\\(\\(sub\\)*section\\|chapter\\|part\\)\\*\\{0,1\\}{.*\\)$" },