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Diffstat (limited to 'funcs/func_strings.c')
| -rw-r--r-- | funcs/func_strings.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/funcs/func_strings.c b/funcs/func_strings.c index a648c6cda..d8327b5ce 100644 --- a/funcs/func_strings.c +++ b/funcs/func_strings.c @@ -223,6 +223,13 @@ static struct ast_custom_function filter_function = { .synopsis = "Filter the string to include only the allowed characters", .syntax = "FILTER(<allowed-chars>,<string>)", .read = filter, + .desc = +"Permits all characters listed in <allowed-chars>, filtering all others out.\n" +"In addition to literally listing the characters, you may also use ranges of\n" +"characters (delimited by a '-'), as well as hexadecimal characters started\n" +"with a \\x (i.e. \\x20) and octal characters started with \\0 (i.e. \\040).\n" +"Also, \\t, \\n, and \\r are recognized. If you want a literal '-' character,\n" +"simply prefix it with a '\\'\n", }; static int regex(struct ast_channel *chan, const char *cmd, char *parse, char *buf, |