如何防止短代码在描述中显示

Question

Using this code

    <?php
$post = $wp_query->post;
$descrip = strip_tags($post->post_content);
$descrip_more = '';
if (strlen($descrip) > 155) {
$descrip = substr($descrip,0,155);
$descrip_more = ' ...';
}
$descrip = str_replace('"', '', $descrip);
$descrip = str_replace("'", '', $descrip);
$descripwords = preg_split('/[\n\r\t ]+/', $descrip, -1, PREG_SPLIT_NO_EMPTY);
array_pop($descripwords);
$descrip = implode(' ', $descripwords) . $descrip_more; 
echo '<meta name="description" content="'.$descrip.'">';
?>

Which outputs someething like this in my header:

<meta name="description" content="[wptabs mode=horizontal background=false] [wptabtitle]     English Lyrics[/wptabtitle] [wptabcontent]Speed Circus Yeah A-yoWOO TAEWOON with the am I     ...">

I was wondering if I could add something to the code that would get rid of the shortcodes? and perhaps anything in them?

Maybe out it like this?

<meta name="description" content="Speed Circus Yeah A-yoWOO TAEWOON with the am I     ...">

Answer 1

What need to do is render the post and not display the post contents. There's a slight difference in here.

You should try using:

apply_filters('the_content', $post->post_content); 

Instead of:

$post->post_content

When you apply filters to the content you get the post as it is displayed to the user, while $post->post_content displays the raw content for the post.

Answer 2

There's a function to remove shortcodes.

https://codex.wordpress.org/Function_Reference/strip_shortcodes

Put this just before the echo:

$descrip = strip_shortcodes( $descrip );

Given that you're outputting this in an attribute you should use the function for escaping attributes. esc_attr() . You can find out more about that here: https://codex.wordpress.org/Function_Reference/esc_attr

Complete example based on your code and comments left on my answer:

 <?php
$post = $wp_query->post;
$descrip = strip_tags( $post->post_content );
$descrip_more = '';
if (strlen($descrip) > 155) {
    $descrip = substr($descrip,0,155);
    $descrip_more = ' ...';
}
$descrip = str_replace('"', '', $descrip);
$descrip = str_replace("'", '', $descrip);

$descripwords = preg_split('/[\n\r\t ]+/', $descrip, -1, PREG_SPLIT_NO_EMPTY);
array_pop($descripwords);
$descrip = implode(' ', $descripwords) . $descrip_more; 
$descrip = strip_shortcodes( $descrip );

echo '<meta name="description" content="' . esc_attr( get_the_title( $post->ID ) . trim( $descrip ) ) . '">';
?>