ngx.encode_args --------------- **语法:** *str = ngx.encode_args(table)* **环境:** *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.*\* 根据 URI 编码规则，将 Lua 表编码成一个查询参数字符串。 例如， ```lua ngx.encode_args({foo = 3, ["b r"] = "hello world"}) ``` 生成 foo=3&b%20r=hello%20world Lua 表的 key 必须是 Lua 字符串。 支持多值参数。可以使用 Lua 表存储参数值，例如： ```lua ngx.encode_args({baz = {32, "hello"}}) ``` 输出 baz=32&baz=hello 如果 value 表是空的，效果等同于 `nil` 值。 支持布尔值参数，例如， ```lua ngx.encode_args({a = true, b = 1}) ``` 输出 a&b=1 如果参数值是 `false`，效果等同于 `nil` 值。 这个方法最早出现在版本 `v0.3.1rc27` 中。 > English Source **syntax:** *str = ngx.encode_args(table)* **context:** *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.*\* Encode the Lua table to a query args string according to the URI encoded rules. For example, ```lua ngx.encode_args({foo = 3, ["b r"] = "hello world"}) ``` yields foo=3&b%20r=hello%20world The table keys must be Lua strings. Multi-value query args are also supported. Just use a Lua table for the argument's value, for example: ```lua ngx.encode_args({baz = {32, "hello"}}) ``` gives baz=32&baz=hello If the value table is empty and the effect is equivalent to the `nil` value. Boolean argument values are also supported, for instance, ```lua ngx.encode_args({a = true, b = 1}) ``` yields a&b=1 If the argument value is `false`, then the effect is equivalent to the `nil` value. This method was first introduced in the `v0.3.1rc27` release. [返回目录](#nginx-api-for-lua)