Empty string supplied as input when parsing content

Question

I have this code:

<?php
function mb_find_my_image( $content ) {
    if( is_home() ) { /* if is home start */

      $dom = new domDocument;
      $dom->loadHTML($content);
      $dom->preserveWhiteSpace = false;


    } /* if is home end */
    return $content;
}
add_filter( 'the_content', 'mb_find_my_image' );
?>

However, it seems that I always get the following error:

Empty string supplied as input on line 6

What I'm I doing wrong here?

I assume that line 6 is this one: $dom->loadHTML($content); ? — s_ha_dum
– s_ha_dum, Commented Apr 17, 2013 at 13:25
What does var_dump($content); tell you? Add that as the first line inside the function. — s_ha_dum
– s_ha_dum, Commented Apr 17, 2013 at 13:30
That is peculiar. That does not look like any var_dump output I have seen. I expected string(123)"content content content". That null is especially interesting and do you actually have those <html code> tags or is that some kind of filler you made up? Either way, it looks like the string is not empty. — s_ha_dum
– s_ha_dum, Commented Apr 17, 2013 at 13:45

Fayaz · Accepted Answer · 2018-08-12 00:40:30Z

1

I have fixed the problem.

The main problem was that I was calling the function mb_find_my_image from index.php. After I've removed the calling from index.php, everything works as it should.

edited Aug 12, 2018 at 0:40

Fayaz

9,0422 gold badges33 silver badges54 bronze badges

answered Apr 18, 2013 at 12:38

Mentalhead

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