Displaying all images from a WordPress post

问题:

I have this piece of code I found on some blog, that's supposed to display all images from a WordPress post.

function getImage() {
    global $more;
    $more = 1;
    $link = get_permalink();
    $content = get_the_content();
    $count = substr_count($content, '<img');
    $start = 0;
    for($i=1;$i<=$count;$i++) {
        $imgBeg = strpos($content, '<img', $start);
        $post = substr($content, $imgBeg);
        $imgEnd = strpos($post, '>');
        $postOutput = substr($post, 0, $imgEnd+1);
        $postOutput = preg_replace('/width="([0-9]*)" height="([0-9]*)"/', '',$postOutput);;
        if(stristr($postOutput,'<img')) { echo $postOutput; }
        $start=$imgEnd+1;
    }
    $more = 0;
}

What happens though... it displays first and second image correctly, then loops the second image instead of 3rd 4th etc. It grabs the number of images okay, but instead of displaying 1st, 2nd, 3rd, 4th image, it displays 1st, 2nd, 2nd, 2nd...

Could anyone look at this snippet and maybe come up with an idea why this happens? I know the code is rather sloppy, but I just found it on some blog, being a PHP newbie and all :)

All help appreciated, thanks in advance!

回答1:

$attachments = get_children(array('post_parent' => $post->ID,
                        'post_status' => 'inherit',
                        'post_type' => 'attachment',
                        'post_mime_type' => 'image',
                        'order' => 'ASC',
                        'orderby' => 'menu_order ID'));

foreach($attachments as $att_id => $attachment) {
    $full_img_url = wp_get_attachment_url($attachment->ID);
    // Your Code here
}

Also you can have a look here: http://www.rlmseo.com/blog/get-images-attached-to-post/

回答2:

its easier now with the new wordpress get_attached_media($type,$post) function

$attachments= get_attached_media( 'image', $post->ID );
foreach($attachments as $att_id => $attachment) {
  $full_img_url = wp_get_attachment_url($attachment->ID);
// You can echo it out here
}

note that this gets only the files uploaded to the post . not files added through media library.

回答3:

Try this ! It may work.

function getImage() {
    global $more;
    $more = 1;
    $link = get_permalink();
    $content = get_the_content();
    $count = substr_count($content, '<img');

    for($i=1;$i<=$count;$i++) { 
        //move $start = 0 inside the loop
        $start = 0;
        $imgBeg = strpos($content, '<img', $start);
        $post = substr($content, $imgBeg);
        $imgEnd = strpos($post, '>');
        $postOutput = substr($post, 0, $imgEnd+1);
        $postOutput = preg_replace('/width="([0-9]*)" height="([0-9]*)"/', '',$postOutput);;
        if(stristr($postOutput,'<img')) { echo $postOutput; }
        $content = substr($content,$imgEnd+1);
    }
    $more = 0;
}

回答4:

<?php
    if ( have_posts() )
    while ( have_posts() ):
    the_post();

    $args = array(
        'post_type'   => 'attachment',
        'numberposts' => -1,
        'post_parent' => $post->ID
        );

    $attachments = get_posts( $args );

    if ( $attachments )
    {
        foreach ( $attachments as $attachment )
        {

        echo wp_get_attachment_image( $attachment->ID, false );

        }
    }

    endwhile;
?>

Source : http://960development.com/code-snippet/get-all-the-images-attached-with-a-wordpress-post/