question seems to be similar to the one asked here but the answer went down a different path.

Pretty much if a user enters a shortcode attribute with a space it will get overwritten by the default value and I can't figure out how to stop this behavior (no mention in the WP Shortcode API docs)


[imageaccordion title="We're awesome"]Content Here[/imageaccordion]


function image_accordion( $atts , $content = null ) {

    // Attributes

                'title' => 'Accordion Title',
            ), $atts , 'imageaccordion'

    // Put It Together

    <div class='image-accordion'>
            <?php echo $title; ?>

    $outputbefore = ob_get_clean();
    $outputafter = '</div>';


    return $outputbefore . do_shortcode($content) . $outputafter;

add_shortcode( 'imageaccordion', 'image_accordion' );

I seem to get an output of

<div class="image-accordion'>
     Accordion Title

Every time...

If I run a print_r on $atts I get

Array ( [0] => 
/> [2] => title="We're [3] => Awesome")

This is on a new installation of WP, no plugins running with the default theme

(have cut down the eg. code too)

  • 1
    There's nothing special that WP does with attributes containing spaces - just tried your shortcode and it works fine - can only think $title is getting overwritten in code between the extract and echo that isn't shown...
    – bonger
    Sep 9, 2014 at 5:26
  • Hmm, i've posted the full code here: chopapp.com/#lg49uyj3 Nope, nothing that overwriting the variable... Seems to happen on all vars with spaces too, can't figure it out
    – csilk
    Sep 9, 2014 at 5:46
  • 1
    Again worked! However, if you're calling it like in the usage example with newlines between attributes then WP won't like that ... try one line [imageaccordion title="We're Value" hovertext="Blah blah hover"]
    – bonger
    Sep 9, 2014 at 6:07
  • Yep, looks like the multiline was the problem... Thanks for checking it out :)
    – csilk
    Sep 9, 2014 at 6:26

2 Answers 2


Looks like I was multi-lining the shortcode itself, wordpress wasn't a fan.

Thanks @bonger

  • Actually, looking at the shortcode_parse_atts code, it'd be an easy fix for WP to deal with this (which it should) by just stripping the <br />'s, eg $text = preg_replace('/<br \/>$/m', '', $text); - might open a ticket on this ... then again, probably won't :( ...
    – bonger
    Sep 9, 2014 at 6:50
  • This is happening to me, yet I am definitely not multi-lining the code. Any other explanations?
    – Millar248
    Sep 13, 2021 at 18:41

The problem seems to be in output buffering. Why not just use assignment operators?

function image_accordion( $atts , $content = null ) {

    // Attributes
    $args = shortcode_atts( array(
        'title' => 'Accordion Title',
    ), $atts , 'imageaccordion' );

    $output = '<div class="image-accordion">';
        $output .= '<h2>' . $args['title'] . '</h2>';
    $output .= '</div>';

    $output .= do_shortcode($content);

    return $output;
add_shortcode( 'imageaccordion', 'image_accordion' );

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