check_import_new_users in /wp-admin/includes/ms.php
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Continue readingMakes sure that a user was referred from another admin page.To avoid security exploits.
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Continue readingOutputs the html checked attribute.Compares the first two arguments and if identical marks as checked
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check_comment
Checks whether a comment passes internal checks to be allowed to add.If comment moderation is set in the administration, then all comments, regardless of their type and whitelist will be set to false. If the number of links exceeds the amount in the administration, then the check fails. If any of the parameter contents match the blacklist of words, then the check fails.
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