In the process of implementing an article management system within modx, I’m wondering if there are any known methods/modules/snippets/etc. that can periodically check external links for validity and, upon finding a dead link, dynamically remove invalid links (or at least notifying the site admin of the broken link).
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Server: *nix, ModX Evo 1.0.4, Apache 2.x, PHP 5.x, Mysql 5.x.