return unformatted content in encosing shortcode

Question

I've written a little shortcode, following basic instructions on Wordpress Codex:

function myshortcode( $atts, $content = null ) {
    extract( shortcode_atts( array(
        ...,
    ), $atts ) );
    return some_html _code_here . $content;
}

When I put

[myshortcode]
this 
is 
a 
test
content
[/myshortcode]

in a post, I obtain the following output:

this <br />
is <br />
a <br />
test <br />
content <br />

How can I avoid the inserting of br / tags?

Answer 1

The <br /> tags are being added to the content by the wpautop() function. If you run your shortcode before it runs they will not be there. It is added in \wp-includes\default-filters.php with the default priority of 10.

add_filter( 'the_content', 'myshortcode', 1 );

function myshortcode( $atts, $content = null ) {
    return $content;
}

wpautop() can also add other markup besides <br /> tags.

Answer 2

function myshortcode( $atts, $content = null ) {
  return strip_tags($content,'br');
}
add_shortcode('myshortcode','myshortcode');

But I am unclear why you are you adding newlines in the first place if you don't want them.

Answer 3

You could try this one:

add_shortcode( 'myshortcode', 'myshortcode_callback' );

function myshortcode_callback( $atts, $content = null ) {
    return str_replace( '<br />', '', $content );
}   

by simply removing the <br /> tags from the output. If you want to strip all HTML tags, you can use strip_tags() instead.