PHP 7.4 and PHP 8.1 compatibility

FILE: /var/www/html/web/sites/all/modules/contrib/forena/Frx.inc
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FOUND 1 ERROR AFFECTING 1 LINE
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 383 | ERROR | Using "parent" inside a class without parent is deprecated since PHP 7.4
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FILE: /var/www/html/web/sites/all/modules/contrib/forena/plugins/FrxMSSQL.inc
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FOUND 16 ERRORS AFFECTING 16 LINES
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  39 | ERROR | Extension 'mssql' is removed since PHP 7.0
  43 | ERROR | Extension 'mssql' is removed since PHP 7.0
  44 | ERROR | Extension 'mssql' is removed since PHP 7.0
 105 | ERROR | Extension 'mssql' is removed since PHP 7.0
 107 | ERROR | Extension 'mssql' is removed since PHP 7.0
 117 | ERROR | Extension 'mssql' is removed since PHP 7.0
 125 | ERROR | Extension 'mssql' is removed since PHP 7.0
 127 | ERROR | Extension 'mssql' is removed since PHP 7.0
 135 | ERROR | Extension 'mssql' is removed since PHP 7.0
 151 | ERROR | Extension 'mssql' is removed since PHP 7.0
 153 | ERROR | Extension 'mssql' is removed since PHP 7.0
 156 | ERROR | Extension 'mssql' is removed since PHP 7.0
 176 | ERROR | Extension 'mssql' is removed since PHP 7.0
 178 | ERROR | Extension 'mssql' is removed since PHP 7.0
 181 | ERROR | Extension 'mssql' is removed since PHP 7.0
 238 | ERROR | Extension 'mssql' is removed since PHP 7.0
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