php +7 compatibility

Hello, I noticed that my site was much slower after changing my version of PHP 7.0 and 7.2, so I did a Theme compatibility test. Below is the theme compatible?

Plugin Usad: PHP Compatibility Checker

FILE: /home2/xxxxxxxx/public_html/wp-content/themes/ribbon/functions/widget-fblikebox.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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18 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.
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FILE: /home2/xxxxxxxx/public_html/wp-content/themes/ribbon/functions/widget-ad125.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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28 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.
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FILE: /home2/xxxxxxxx/public_html/wp-content/themes/ribbon/functions/plugin-activation.php
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FOUND 1 ERROR AFFECTING 1 LINE
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4030 | ERROR | “$this” can no longer be used in a plain function or method since PHP 7.1.
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FILE: /home2/xxxxxxxx/public_html/wp-content/themes/ribbon/functions/widget-ad300.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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28 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.
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FILE: /home2/xxxxxxxx/public_html/wp-content/themes/ribbon/functions/widget-tweets.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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23 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.
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FILE: /home2/xxxxxxxx/public_html/wp-content/themes/ribbon/functions/widget-tabs.php
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FOUND 0 ERRORS AND 1 WARNING AFFECTING 1 LINE
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61 | WARNING | Use of deprecated PHP4 style class constructor is not supported since PHP 7.
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