sudo pear install doc.php.net/pman

　　sudo pear upgrade pear

　　pman strlen

　　#pman --help

　　man, version 1.6c

　　usage: man [-adfhktwW] [section] [-M path] [-P pager] [-S list]

　　[-m system] [-p string] name ...

　　a : find all matching entries

　　c : do not use cat file

　　d : print gobs of debugging information

　　D : as for -d, but also display the pages

　　f : same as whatis(1)

　　h : print this help message

　　k : same as apropos(1)

　　K : search for a string in all pages

　　t : use troff to format pages for printing

　　w : print location of man page(s) that would be displayed

　　(if no name given: print directories that would be searched)

　　W : as for -w, but display filenames only

　　C file : use `file as configuration file

　　M path : set search path for manual pages to `path

　　P pager : use program `pager to display pages

　　S list : colon separated section list

　　m system : search for alternate systems man pages

　　p string : string tells which preprocessors to run

　　e - [n]eqn(1) p - pic(1) t - tbl(1)

　　g - grap(1) r - refer(1) v - vgrind(1)

　　:!pman strlen