undying commented on code in PR #12187:
URL: https://github.com/apache/apisix/pull/12187#discussion_r2137220282
##########
apisix/core/utils.lua:
##########
@@ -337,6 +337,24 @@ do
end
end
-- Resolve ngx.var in the given string
+-- @function core.utils.resolve_var
+-- @tparam string tpl The template string to resolve variables in
+-- @tparam table ctx The context table containing variables
+-- @tparam function escaper Optional function to escape resolved values
+-- @treturn string The resolved string
+-- @treturn string|nil Error message if any
+-- @treturn number Number of variables replaced
+-- @usage
+-- local utils = require("apisix.core.utils")
+--
+-- -- Usage examples:
+-- local res = utils.resolve_var("$host", ctx.var) -- "example.com"
+-- local res = utils.resolve_var("${host}", ctx.var) -- "example.com"
+-- local res = utils.resolve_var("TMP_${VAR1}_${VAR2}", ctx.var) --
"TMP_value1_value2"
+-- local res = utils.resolve_var("\\$host", ctx.var) -- "$host"
Review Comment:
I've checked that [pat
regex](https://github.com/apache/apisix/blob/master/apisix/core/utils.lua#L298C19-L298C45)
is [working this way](https://regex101.com/r/LJgPIo/1).
But anyway, I deleted the documentation based on Baoyuantop's recommendation.
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