Wrong featured image links

It’s not in the index.php. It’s in wp-includes/post-thumbnail-template.php (I found searching for it in a downloaded copy):

<?php
/**
 * WordPress Post Thumbnail Template Functions.
 *
 * Support for post thumbnails
 * Themes function.php must call add_theme_support( 'post-thumbnails' ) to use these.
 *
 * @package WordPress
 * @subpackage Template
 */

/**
 * Check if post has an image attached.
 *
 * @since 2.9.0
 *
 * @param int $post_id Optional. Post ID.
 * @return bool Whether post has an image attached.
 */
function has_post_thumbnail( $post_id = null ) {
	return (bool) get_post_thumbnail_id( $post_id );
}

/**
 * Retrieve Post Thumbnail ID.
 *
 * @since 2.9.0
 *
 * @param int $post_id Optional. Post ID.
 * @return int
 */
function get_post_thumbnail_id( $post_id = null ) {
	$post_id = ( null === $post_id ) ? get_the_ID() : $post_id;
	return get_post_meta( $post_id, '_thumbnail_id', true );
}

/**
 * Display Post Thumbnail.
 *
 * @since 2.9.0
 *
 * @param string|array $size Optional. Image size. Defaults to 'post-thumbnail', which theme sets using set_post_thumbnail_size( $width, $height, $crop_flag );.
 * @param string|array $attr Optional. Query string or array of attributes.
 */
function the_post_thumbnail( $size = 'post-thumbnail', $attr = '' ) {
	echo get_the_post_thumbnail( null, $size, $attr );
}

/**
 * Update cache for thumbnails in the current loop
 *
 * @since 3.2.0
 *
 * @param object $wp_query Optional. A WP_Query instance. Defaults to the $wp_query global.
 */
function update_post_thumbnail_cache( $wp_query = null ) {
	if ( ! $wp_query )
		$wp_query = $GLOBALS['wp_query'];

	if ( $wp_query->thumbnails_cached )
		return;

	$thumb_ids = array();
	foreach ( $wp_query->posts as $post ) {
		if ( $id = get_post_thumbnail_id( $post->ID ) )
			$thumb_ids[] = $id;
	}

	if ( ! empty ( $thumb_ids ) ) {
		_prime_post_caches( $thumb_ids, false, true );
	}

	$wp_query->thumbnails_cached = true;
}

/**
 * Retrieve Post Thumbnail.
 *
 * @since 2.9.0
 *
 * @param int $post_id Optional. Post ID.
 * @param string $size Optional. Image size. Defaults to 'post-thumbnail'.
 * @param string|array $attr Optional. Query string or array of attributes.
 */
function get_the_post_thumbnail( $post_id = null, $size = 'post-thumbnail', $attr = '' ) {
	$post_id = ( null === $post_id ) ? get_the_ID() : $post_id;
	$post_thumbnail_id = get_post_thumbnail_id( $post_id );

	/**
	 * Filter the post thumbnail size.
	 *
	 * @since 2.9.0
	 *
	 * @param string $size The post thumbnail size.
	 */
	$size = apply_filters( 'post_thumbnail_size', $size );

	if ( $post_thumbnail_id ) {

		/**
		 * Fires before fetching the post thumbnail HTML.
		 *
		 * Provides "just in time" filtering of all filters in wp_get_attachment_image().
		 *
		 * @since 2.9.0
		 *
		 * @param string $post_id           The post ID.
		 * @param string $post_thumbnail_id The post thumbnail ID.
		 * @param string $size              The post thumbnail size.
		 */
		do_action( 'begin_fetch_post_thumbnail_html', $post_id, $post_thumbnail_id, $size );
		if ( in_the_loop() )
			update_post_thumbnail_cache();
		$html = wp_get_attachment_image( $post_thumbnail_id, $size, false, $attr );

		/**
		 * Fires after fetching the post thumbnail HTML.
		 *
		 * @since 2.9.0
		 *
		 * @param string $post_id           The post ID.
		 * @param string $post_thumbnail_id The post thumbnail ID.
		 * @param string $size              The post thumbnail size.
		 */
		do_action( 'end_fetch_post_thumbnail_html', $post_id, $post_thumbnail_id, $size );

	} else {
		$html = '';
	}
	/**
	 * Filter the post thumbnail HTML.
	 *
	 * @since 2.9.0
	 *
	 * @param string $html              The post thumbnail HTML.
	 * @param string $post_id           The post ID.
	 * @param string $post_thumbnail_id The post thumbnail ID.
	 * @param string $size              The post thumbnail size.
	 * @param string $attr              Query string of attributes.
	 */
	return apply_filters( 'post_thumbnail_html', $html, $post_id, $post_thumbnail_id, $size, $attr );
}

Thank you, Morteza!

This demo is not using a static homepage (but with a static homepage I’ve got the same results).

The website is using RocketTheme’s RokSprocket Mosaic Layout wich is set to show the page’s Featured Image (wich work works perfectly on my localhost).

The index.php:

<?php
/**
 * Front to the WordPress application. This file doesn't do anything, but loads
 * wp-blog-header.php which does and tells WordPress to load the theme.
 *
 * @package WordPress
 */

/**
 * Tells WordPress to load the WordPress theme and output it.
 *
 * @var bool
 */
define('WP_USE_THEMES', true);

/** Loads the WordPress Environment and Template */
require( dirname( __FILE__ ) . '/wp-blog-header.php' );

The page.php:

<?php
/**
 * @version   1.0 May 14, 2013
 * @author    RocketTheme http://www.rockettheme.com
 * @copyright Copyright (C) 2007 - 2013 RocketTheme, LLC
 * @license   http://www.gnu.org/licenses/gpl-2.0.html GNU/GPLv2 only
 */
// no direct access
defined( 'ABSPATH' ) or die( 'Restricted access' );
?>

<?php global $post, $posts, $query_string; ?>

	<div class="item-page">

		<?php if ( have_posts() ) : ?>

			<?php /** Begin Page Heading **/ ?>

			<?php if( $gantry->get( 'page-page-heading-enabled', '0' ) && $gantry->get( 'page-page-heading-text' ) != '' ) : ?>

				<h1>
					<?php echo $gantry->get( 'page-page-heading-text' ); ?>
				</h1>

			<?php endif; ?>

			<?php /** End Page Heading **/ ?>

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

				<?php $this->gantry_get_template_part( 'content/content', ( post_type_supports( get_post_type(), 'post-formats' ) ? get_post_format() : get_post_type() ) ); ?>

			<?php endwhile; ?>

		<?php else : ?>

			<h1>
				<?php _re('Sorry, no pages matched your criteria.'); ?>
			</h1>

		<?php endif; ?>

	</div>

Thank you again Morteza!

This is a very barebone demo of the problem and I did not apply any modification to theme and the base plugins (gantry + rokcommon + roksprocket from RocketTheme) and there are no other plugins installed.

I’ve tried many installations and also with other theme and it’s a general problem in my hosting environment.

However on my xampp localhost it always works perfectly (I’ve tested with many installations).

I don’t know why/how on the domain server (Servage) the string “http://biro.name/wp-content/home43b/sub001/sc27622-OTFB/” is attached at the beginning of the links. Without this string the links are correct.

Just I don’t know how to stop this strings to be attached. I’ve tried removing them from the MySQL database with interconectit find and replace, but they get regenerated somehow.

Problem solved! 🙂

It was caused by a conflict of RokSprocket plugin with my specific hosting environment.

You can find the solution (commenting out 3 lines of php code) here.