John Blackbourn d5b31e6ba2 Introduce map_deep(), a utility function that recursively maps a callable function to every item in an array or object. Works like array_walk_recursive() but works with objects too.
Updates `rawurlencode_deep()`, `urlencode_deep()`, and `stripslashes_deep()` to use `map_deep()`. Introduces `urldecode_deep()` for completeness.

Props wpmuguru, nbachiyski, boonebgorges, MikeHansenMe, chriscct7, realloc, johnbillion
Fixes #22300


git-svn-id: https://develop.svn.wordpress.org/trunk@35252 602fd350-edb4-49c9-b593-d223f7449a82
2015-10-17 23:25:21 +00:00
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