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<?php $strings = [ "test@test.edu", "test@test.edu.pl", "test@test.com", "test.edu@test.com" ]; foreach ($strings as $string) { if (in_array("edu", explode(".", explode("@", $string)[1]))) { echo "$string contains .edu after @" . PHP_EOL; } else { echo "$string dot not contain .edu after @" . PHP_EOL;; } }
Output for git.master, git.master_jit, rfc.property-hooks
test@test.edu contains .edu after @ test@test.edu.pl contains .edu after @ test@test.com dot not contain .edu after @ test.edu@test.com dot not contain .edu after @

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