Panoramica del problema
Il problema si presenta quando hai una query per due tassonomie – simile a questi esempi:
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
Questo causa il seguente errore:
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
Soluzione alternativa
Questo problema è stato risolto in WPML 3.4.0. L'aggiornamento risolve il problema sul tuo sito, quindi hai bisogno di questa soluzione alternativa solo se non puoi ancora aggiornare.
La seguente soluzione alternativa funziona per entrambe le versioni 3.3.6 e 3.3.7 di WPML, ma il nome del file che devi modificare è diverso:
- Per la versione 3.3.6 di WPML, devi modificare il file sitepress.class.php che si trova nella cartella principale del plugin WPML.
- Per la versione 3.3.7 di WPML, devi modificare il file class-wpml-seo-headlangs.php, che si trova nella seguente posizione: ../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
}