如何调用WordPress First Image Post或附加图像或默认

谁能帮我开发一个wordpress脚本，如果它不存在，它将获得第一个附加（上传）的图像。

Theoretically:[如果存在]

<img src="<?php echo catch_that_image() ?>" />

[或其他]

<img src="\'. wp_get_attachment_url($attachment->ID) . \'" alt="Main Image" id="mainImage"" />

[或其他]

<img src="<?php bloginfo(\'template_url\') ?>/images/default.png" />

My current code looks like this (UPDATED.. AGAIN)

<?php  
 $args = array(
 \'post_parent\' => $post->ID,
 \'post_type\' => \'attachment\',
 \'post_mime_type\' => \'image\',
 \'orderby\' => \'menu_order\',
 \'order\' => \'ASC\',
 \'offset\' => \'0\',
 \'numberposts\' => 1 
 );
 $attachments = get_posts($args);
 $images =& get_children( \'post_type=attachment&post_mime_type=image&post_parent=\' . $post->ID );
 if ($attachments) {
 foreach ($attachments as $attachment) {
 if(wp_attachment_is_image( $attachment->ID )) {
 echo \'<img src="\'. wp_get_attachment_url($attachment->ID) . \'" alt="Main Image" id="mainImage"" />\'; }}} 
 <!-- else if ( count( $images ) > 0 ) echo get_the_post_thumbnail; } -->
 else {
 echo \'<img src="http://hellotokyostore.com/wp-content/themes/hellotokyo/images/default.png" alt="Hello Tokyo" />\'; }
?>

<?php $args = array( \'post_parent\' => $post->ID, \'post_type\' => \'attachment\', \'post_mime_type\' => \'image\', \'orderby\' => \'menu_order\', \'order\' => \'ASC\', \'offset\' => \'0\', \'numberposts\' => 1 ); $images = get_posts($args); if ( count( $images ) > 0 ) { echo \'<img src="\'. wp_get_attachment_url($images[0]->ID) . \'" alt="Main Image" id="mainImage"" />\'; } else { echo \'<img src="http://hellotokyostore.com/wp-content/themes/hellotokyo/images/default.png" alt="Hello Tokyo"/>\'; } ?>

<?php if (function_exists(\'add_theme_support\')) { add_theme_support(\'post-thumbnails\'); /* change these dimensions to suit your website. noticed you used 250 * 250 on the page you linked in OP comments, so I\'ve used that. you may want to increase the size of your individual page\'s thumbnails */ add_image_size(\'index-categories\', 250, 250, true); add_image_size(\'page-single\', 250, 250, true); } function InsertFeaturedImage($content) { global $post; $original_content = $content; $default_thumbnail = get_bloginfo(\'template_directory\') . \'/images/default_thumbnail.png\'; $default_src = \'<img src="\' . $default_thumbnail . \'" alt="Your caption here" />\'; if ( current_theme_supports( \'post-thumbnails\' ) ) { if ( ( is_page() ) || ( is_single() ) ) { /* if you\'re viewing a single post 250 * 250 as designated above */ if ( has_post_thumbnail() ) { $content = the_post_thumbnail(\'page-single\'); } else { $content = $default_src; } $content .= $original_content; } else { /* if you\'re viewing a list of posts, use this size of thumbnail 250 * 250 as designated above */ if ( has_post_thumbnail() ) { $content = the_post_thumbnail(\'index-categories\'); } else { $content = $default_src; } $content .= $original_content; } } return $content; } add_filter( \'the_content\', \'InsertFeaturedImage\' ); ?>

小码农CODE

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