Site Health Issues & PHP legacy code

Contactic is causing some issues to show up in the new WordPress feature “Site Health”. When this plugin (or Contact Form DB, to be clear) are active, the following two critical errors appear:

The REST API encountered an error
Your site could not complete a loopback request

Additionally, under the “Recommended Improvement” section:

Background updates may not be working properly.
– Could not confirm that the wp_version_check() filter is available.

These do not appear on other sites using the same hosting / config and on this test site when Contactic / Contact Form DB are not installed and/or disabled. The issues seem directly related to the plugin.

Additionally, the PHP Compatibility Checker plugin for v7.2 finds many issues with Contactic, which I’ve pasted below, with a PATH redaction. I realize that some of the mysqli related warnings could be due to backward compatibility code.

FILE: /home/PATH/public_html/wp-content/plugins/contactic/CTC_QueryResultIterator.php
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FOUND 13 ERRORS AFFECTING 13 LINES
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47 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
59 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
85 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
87 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
114 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
121 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
122 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
132 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
136 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
138 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
146 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
150 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
152 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
————————————————————————————————————

FILE: /home/PATH/public_html/wp-content/plugins/contactic/CTC_WpdbUnbufferedResultIterator.php
————————————————————————————————————
FOUND 6 ERRORS AFFECTING 6 LINES
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72 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
74 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
97 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
100 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
122 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
124 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0; Use mysqli instead
————————————————————————————————————

FILE: /home/PATH/public_html/wp-content/plugins/contactic/CTC_Deobfuscate.php
——————————————————————————————————————————————————
FOUND 3 ERRORS AFFECTING 1 LINE
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43 | ERROR | Extension ‘mcrypt’ is deprecated since PHP 7.1 and removed since PHP 7.2; Use openssl (preferred) or pecl/mcrypt once available instead
43 | ERROR | Function mcrypt_decrypt() is deprecated since PHP 7.1 and removed since PHP 7.2; Use OpenSSL instead
43 | ERROR | The constant “MCRYPT_3DES” is deprecated since PHP 7.1 and removed since PHP 7.2
——————————————————————————————————————————————————

Thank you for looking into these things.