Memory Usage, Memory Limit, PHP and Server Memory Health Check and Provide Suggestions

The use of function proc_open() is forbidden

File operations should use WP_Filesystem methods instead of direct PHP filesystem calls. Found: fclose().

Global variables defined by a theme/plugin should start with the theme/plugin prefix. Found: "$last_feedback".

Global variables defined by a theme/plugin should start with the theme/plugin prefix. Found: "$last_feedback".

Use placeholders and $wpdb->prepare(); found $sql

Global variables defined by a theme/plugin should start with the theme/plugin prefix. Found: "$last_feedback".

Global variables defined by a theme/plugin should start with the theme/plugin prefix. Found: "$delta".

All output should be run through an escaping function (see the Security sections in the WordPress Developer Handbooks), found '"{$num_attacks} attacks in {$time_formatted} (avg. {$attacks_per_hour} attacks/hour)"'.

A function call to __() with texts containing placeholders was found, but was not accompanied by a "translators:" comment on the line above to clarify the meaning of the placeholders.

All output should be run through an escaping function (see the Security sections in the WordPress Developer Handbooks), found '__'.