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rand() is discouraged. Use the far less predictable wp_rand() instead.

date() is affected by runtime timezone changes which can cause date/time to be incorrectly displayed. Use gmdate() instead.

All output should be run through an escaping function (like esc_html_e() or esc_attr_e()), found '_e'.

Missing $domain parameter in function call to _e().

All output should be run through an escaping function (like esc_html_e() or esc_attr_e()), found '_e'.

The $text parameter must be a single text string literal. Found: get_post_meta( $post_id, '_mcc_to', true )

All output should be run through an escaping function (like esc_html_e() or esc_attr_e()), found '_e'.

Missing $domain parameter in function call to _e().

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 '__'.