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

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

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

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

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

Unescaped parameter $post_status used in $wpdb->get_var($wpdb->prepare(\n\t\t\t\t"SELECT COUNT( 1 )\n\t\t\t\tFROM $wpdb->posts\n\t\t\t\tINNER JOIN $wpdb->postmeta\n\t\t\t\tON $wpdb->posts.id = $wpdb->postmeta.post_id\n\t\t\t\tWHERE $wpdb->posts.post_type = '%s'\n\t\t\t\tAND $wpdb->posts.post_status IN ( " . join( ', ', $post_status ) . " )\n\t\t\t\tAND $wpdb->postmeta.meta_key = '%s'\n\t\t\t\tAND $wpdb->postmeta.meta_value != ''",\n\t\t\t\t'attachment',\n\t\t\t\t'_wp_attachment_wp_user_avatar'\n\t\t\t))

Simple placeholders should not be quoted in the query string in $wpdb->prepare(). Found: '%s'.

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

Simple placeholders should not be quoted in the query string in $wpdb->prepare(). Found: '%s'.

A function call to _n() 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.