Overview of the Issue
The issue appears when you have a query for two taxonomies – similar to these examples:
http://example.com/?my-category=term&other-category=other-term
http://example.com/other-category/other-term/?my-category=term
http://example.com/my-category/term/?other-category=other-term
This leads to the following error:
PHP Catchable fatal error: Object of class WP_Error could not be converted to string in .../wp-content/plugins/sitepress-multilingual-cms/sitepress.class.php on line 4843
Workaround
This issue is fixed in WPML 3.4.0. Updating solves it on your site, so you only need this workaround if you can’t update yet.
The following workaround works both for WPML versions 3.3.6 and 3.3.7, but the name of the file you need to edit is different:
- For WPML version 3.3.6, you need to edit the sitepress.class.php file which can be found in the WPML plugin’s main folder.
- For WPML version 3.3.7, you need to edit the class-wpml-seo-headlangs.php file, which can be found in the following location: ../sitepress-multilingual-cms/classes/seo/
function head_langs()
{
$languages = $this->get_ls_languages( array( 'skip_missing' => true ) );
// If there are translations and is not paged content...
// Renders head alternate links only on certain conditions
$the_post = get_post();
$the_id = $the_post ? $the_post->ID : false;
$is_valid = count( $languages ) > 1
&& !is_paged()
&& ( ( ( is_single()
|| is_page() )
&& $the_id
&& get_post_status( $the_id ) == 'publish' )
|| ( is_home()
|| is_front_page()
|| is_archive() ) );
if ( $is_valid ) {
foreach ( $languages as $code => $lang ) {
if (!is_wp_error($lang[ 'url' ])) { // <<< temp fix
$alternate_hreflang =
apply_filters( 'wpml_alternate_hreflang', $lang[ 'url' ], $code );
printf( '' . PHP_EOL,
$this->get_language_tag( $code ),
str_replace( '&', '&', $alternate_hreflang )
);
} // <<< temp fix
}
}
}public function render_ls_li_item( $lang,
$lang_native_hidden = false,
$lang_translated_hidden = false,
$language_selected = ""
)
{
global $icl_language_switcher_preview;
if (!is_wp_error($lang[ 'url' ])) { // <<< temp fix
$country_flag_url = $lang[ 'country_flag_url' ];
$language_url = apply_filters ( 'WPML_filter_link', $lang[ 'url' ], $lang );
$language_flag_title = $this->settings[ 'icl_lso_display_lang' ]
? esc_attr ( $lang[ 'translated_name' ] )
: esc_attr ( $lang[ 'native_name' ] );
$ls_settings =
$this->get_ls_settings ( $lang, $lang_native_hidden, $lang_translated_hidden );
$language_selector =
'<li class="icl-' . $lang[ 'language_code' ]
. '"><a href="' . $language_url . '" ' . $language_selected . '>';
if ( $this->settings[ 'icl_lso_flags' ]
|| $icl_language_switcher_preview ):
$language_selector .=
'<img ' . ( !$this->settings[ 'icl_lso_flags' ]
? 'style="display:none"' : '' )
. ' class="iclflag" '
. 'src="' . $country_flag_url . '" '
. 'alt="' . $lang[ 'language_code' ] . '" '
. 'title="' . $language_flag_title . '" /> ';
endif;
$ls_settings = $this->get_ls_settings (
$lang,
$ls_settings[ 'lang_native_hidden' ],
$ls_settings[ 'lang_translated_hidden' ]
);
$language_selector .= icl_disp_language (
$ls_settings[ 'lang_native' ],
$ls_settings[ 'lang_translated' ],
$ls_settings[ 'lang_native_hidden' ],
$ls_settings[ 'lang_translated_hidden' ]
);
$language_selector
.= '</a></li>';
return $language_selector;
} // <<< temp fix
}