WordPress: Solution to backend editor filtering some Html tags by default

Based on security considerations, the WordPress backend editor will filter out some HTML tags by default when publishing articles, such as script, onclick, etc. But many times, we may use these HTML tags to meet special needs when publishing articles. Currently, articles on the Internet basically need to modify the WordPress core file, which will become invalid when the WordPress version is upgraded, and it is also more dangerous. This article will introduce how to prevent the WordPress backend editor from filtering some HTML tags by default through theme files.

In the WordPress theme functions.php file, add the following code:

kses_remove_filters()

The implementation code of this function is as follows:

function kses_remove_filters() {
//Normal filtering.
remove_filter( 'title_save_pre', 'wp_filter_kses' );

// Comment filtering.
remove_filter( 'pre_comment_content', 'wp_filter_post_kses' );
remove_filter( 'pre_comment_content', 'wp_filter_kses' );

// Global Styles filtering.
remove_filter( 'content_save_pre', 'wp_filter_global_styles_post', 9 );
remove_filter( 'content_filtered_save_pre', 'wp_filter_global_styles_post', 9 );

// Post filtering.
remove_filter( 'content_save_pre', 'wp_filter_post_kses' );
remove_filter( 'excerpt_save_pre', 'wp_filter_post_kses' );
remove_filter( 'content_filtered_save_pre', 'wp_filter_post_kses' );
}

If our theme does not need to cancel all filtering methods, we can also select the filtering methods to be canceled based on the above code. For example, we call the following code separately in functions.php:

remove_filter( 'content_save_pre', 'wp_filter_post_kses' );

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