Php compatibility checker warnings

FILE: /home/faietdohrnii/public_html/blog/wp-content/plugins/gator-cache/lib/Reo/Classic/CacheLite.php
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FOUND 0 ERRORS AND 4 WARNINGS AFFECTING 4 LINES
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681 | WARNING | Function set_magic_quotes_runtime() is deprecated since PHP 5.3
701 | WARNING | Function set_magic_quotes_runtime() is deprecated since PHP 5.3
735 | WARNING | Function set_magic_quotes_runtime() is deprecated since PHP 5.3
743 | WARNING | Function set_magic_quotes_runtime() is deprecated since PHP 5.3
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