ngx.re.gsub ----------- **语法:** *newstr, n, err = ngx.re.gsub(subject, regex, replace, options?)* **环境:** *init_worker_by_lua*\**, set_by_lua*\**, rewrite_by_lua*\**, access_by_lua*\**, content_by_lua*\**, header_filter_by_lua*\**, body_filter_by_lua*\**, log_by_lua*\**, ngx.timer.*\* 就象 [ngx.re.sub](#ngxresub), 但执行全局替换。 下面是例子: ```lua local newstr, n, err = ngx.re.gsub("hello, world", "([a-z])[a-z]+", "[$0,$1]", "i") if newstr then -- newstr == "[hello,h], [world,w]" -- n == 2 else ngx.log(ngx.ERR, "error: ", err) return end ``` ```lua local func = function (m) return "[" .. m[0] .. "," .. m[1] .. "]" end local newstr, n, err = ngx.re.gsub("hello, world", "([a-z])[a-z]+", func, "i") -- newstr == "[hello,h], [world,w]" -- n == 2 ``` 这个方法需要在 Nginx 中启用 PCRE 库。 ([Known Issue With Special Escaping Sequences](#special-escaping-sequences)). 这个功能最早出现在 `v0.2.1rc15` 版本中。 > English Source **syntax:** *newstr, n, err = ngx.re.gsub(subject, regex, replace, options?)* **context:** *init_worker_by_lua*\**, set_by_lua*\**, rewrite_by_lua*\**, access_by_lua*\**, content_by_lua*\**, header_filter_by_lua*\**, body_filter_by_lua*\**, log_by_lua*\**, ngx.timer.*\* Just like [ngx.re.sub](#ngxresub), but does global substitution. Here is some examples: ```lua local newstr, n, err = ngx.re.gsub("hello, world", "([a-z])[a-z]+", "[$0,$1]", "i") if newstr then -- newstr == "[hello,h], [world,w]" -- n == 2 else ngx.log(ngx.ERR, "error: ", err) return end ``` ```lua local func = function (m) return "[" .. m[0] .. "," .. m[1] .. "]" end local newstr, n, err = ngx.re.gsub("hello, world", "([a-z])[a-z]+", func, "i") -- newstr == "[hello,h], [world,w]" -- n == 2 ``` This method requires the PCRE library enabled in Nginx. ([Known Issue With Special Escaping Sequences](#special-escaping-sequences)). This feature was first introduced in the `v0.2.1rc15` release. [返回目录](#nginx-api-for-lua)