How to filter out shortcode when displaying the_excerpt() in the loop?

Question

I'm using the_excerpt() in my template loop to display post excerpt on the front page.

It's currently displaying unwanted shortcode directly on the front page

eg.

[box]post content[/box]

[alert]post content[/alert]

How can I filter out these shortcode only while keeping the actual content?

Answer 1

try this

add_filter( 'get_the_excerpt', 'strip_shortcodes', 20 );

or try this edit

echo strip_shortcodes( get_the_excerpt() );

if shortcode is not register with wordpress function add_shortcode

add_filter( 'the_excerpt', 'remove_shortcodes_in_excerpt', 20 );

function remove_shortcodes_in_excerpt( $content){
    $content = strip_shortcodes($content);
    $tagnames = array('box', 'alert');  // add shortcode tag name [box]content[/box] tagname = box
    $content = do_shortcodes_in_html_tags( $content, true, $tagnames );

    $pattern = get_shortcode_regex( $tagnames );
    $content = preg_replace_callback( "/$pattern/", 'strip_shortcode_tag', $content );
    return $content;
}

Answer 2

function wpsesess_ddecode_excerpt( $excerpt )
{
    return strip_shortcodes( $excerpt );
}
add_filter( 'the_excerpt', 'wpsesess_ddecode_excerpt' );

EDIT Can you please post this in functions.php and let me know?

Answer 3

Try:

$excerpt = $post->post_excerpt;
$excerpt = apply_filters('the_content', $excerpt);
echo $excerpt;

Or:

$excerpt = $post->post_excerpt;
$excerpt = apply_filters('the_excerpt', $excerpt);
echo $excerpt;

Answer 4

Since your new theme doesn't register the shortcodes they're regarded as plain text. Any attempt at filtering is useless, because as far as WordPress is concerned they aren't shortcodes.

The easiest way to solve this is to register the shortcodes in your new theme and hook them to an action that does nothing besides removing the shortcode.