default_password_nag in /wp-admin/includes/user.php
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Continue readingWrite contents to the file used for debugging.Technically, this can be used to write to any file handle when the global $debug is set to 1 or true.
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Continue readingOpen the file handle for debugging.This function is used for XMLRPC feature, but it is general purpose enough to be used in anywhere.
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Continue readingClose the debugging file handle.Technically, this can be used to close any file handle when the global $debug is set to 1 or true.
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