PHP 7 Compatibility issues

Hi Support, please check the errors and warnings showing on our website running on PHP 7. Although they may not be vital, it is better to take care of them now.

wp-content/plugins/tablepress/views/view-about.php
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FOUND 2 ERRORS AFFECTING 2 LINES
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185 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
186 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
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wp-content/plugins/tablepress/libraries/simplexlsx.class.php
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FOUND 0 ERRORS AND 2 WARNINGS AFFECTING 2 LINES
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602 | WARNING | The use of function dl is discouraged from PHP version 5.3
604 | WARNING | The use of function dl is discouraged from PHP version 5.3
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wp-content/plugins/tablepress/libraries/excel-reader.class.php
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FOUND 0 ERRORS AND 2 WARNINGS AFFECTING 2 LINES
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223 | WARNING | Method name “OLERead::__readData” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
241 | WARNING | Method name “OLERead::__readPropertySets” is discouraged; PHP has reserved all method names with a double underscore prefix for future use
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