Php document update

The following is a simple trial:
Install pman
Install pman using the legendary pear
Sudo pear install doc.php.net/pman

If the pear version is old, you must upgrade the pear to continue.

Sudo pear upgrade pear

Pman usage
Pman is a dumb. For example, we want to view the help information of strlen:

Pman strlen

The help text is color-coded and comparable to the chm version of php help documentation. Pman's detailed help is as follows:
# 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 wocould be displayed
(If no name given: print directories that wocould 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 system's 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)


Another advantage is that it is more convenient to view the php help information in vim.

:! Pman strlen