code = open('cs_20.php', encoding='utf-8').read()
esc = code.replace(chr(92), chr(92) + chr(92)).replace(chr(39), chr(92) + chr(39))
sql = "UPDATE wp_snippets SET code='" + esc + "' WHERE id=20;"
open('update_snippet.sql', 'w', encoding='utf-8').write(sql)
print('sql bytes:', len(sql))