php man page for errno

errno(1)																  errno(1)

NAME
       errno - look up errno names and descriptions

SYNOPSIS
       errno {name-or-code}
       errno [-ls] [--list]
       errno [-s] [--search] {word}
       errno [-S] [--search-all-locales] {word}

DESCRIPTION
       errno  looks  up  errno	macro  names,  errno codes, and the corresponding descriptions. For example, if given ENOENT on a Linux system, it
       prints out the code 2 and the description "No such file or directory".  If given the code 2, it printes ENOENT and the same description.

OPTIONS
       -l, --list
	      List all errno values.

       -s, --search
	      Search for errors whose description contains all the given words (case-insensitive).

       -S, --search-all-locales
	      Like --search, but searches all installed locales.

AUTHOR
       Lars Wirzenius

SEE ALSO
       errno(3)

								    2012-06-05								  errno(1)