Comment afficher une liste de termes hiérarchiques?

Utilisez wp_list_categories avec 'taxonomy' => 'taxonomy',ilest conçupour créer des listes de catégories hiérarchiquesmaisprendra égalementen charge l'utilisation d'unetaxonomiepersonnalisée.

Exemple de codex:
Afficher lestermes dans unetaxonomiepersonnalisée

Si la liste revient àplat,ilestpossible que vous ayezjustebesoin d'unpeu de CSSpour ajouter du remplissage aux listes,afin que vouspuissiez voir leur structure hiérarchique.

Use wp_list_categories with the 'taxonomy' => 'taxonomy' argument, it's built for creating hierarchical category lists but will also support using a custom taxonomy..

Codex Example:
Display terms in a custom taxonomy

If the list comes back looking flat, it's possible you just need a little CSS to add padding to the lists, so you can see their hierarchical structure.

Jeme rends compte que c'est une questiontrès ancienne,mais si vous avezbesoin de construire une structure determes réelle,celapourrait être uneméthode utilepour vous:

 /**
 * Recursively sort an array of taxonomy terms hierarchically. Child categories will be
 * placed under a 'children' member of their parent term.
 * @param Array   $cats     taxonomy term objects to sort
 * @param Array   $into     result array to put them in
 * @param integer $parentId the current parent ID to put them in
 */
function sort_terms_hierarchically(Array &$cats, Array &$into, $parentId = 0)
{
    foreach ($cats as $i => $cat) {
        if ($cat->parent == $parentId) {
            $into[$cat->term_id] = $cat;
            unset($cats[$i]);
        }
    }

    foreach ($into as $topCat) {
        $topCat->children = array();
        sort_terms_hierarchically($cats, $topCat->children, $topCat->term_id);
    }
}
 

L'utilisationest la suivante:

 $categories = get_terms('my_taxonomy_name', array('hide_empty' => false));
$categoryHierarchy = array();
sort_terms_hierarchically($categories, $categoryHierarchy);

var_dump($categoryHierarchy);
 

I realize, this is a very old question, but if you have a need to build up an actual structure of terms, this might be a useful method for you:

/**
 * Recursively sort an array of taxonomy terms hierarchically. Child categories will be
 * placed under a 'children' member of their parent term.
 * @param Array   $cats     taxonomy term objects to sort
 * @param Array   $into     result array to put them in
 * @param integer $parentId the current parent ID to put them in
 */
function sort_terms_hierarchically(Array &$cats, Array &$into, $parentId = 0)
{
    foreach ($cats as $i => $cat) {
        if ($cat->parent == $parentId) {
            $into[$cat->term_id] = $cat;
            unset($cats[$i]);
        }
    }

    foreach ($into as $topCat) {
        $topCat->children = array();
        sort_terms_hierarchically($cats, $topCat->children, $topCat->term_id);
    }
}

Usage is as follows:

$categories = get_terms('my_taxonomy_name', array('hide_empty' => false));
$categoryHierarchy = array();
sort_terms_hierarchically($categories, $categoryHierarchy);

var_dump($categoryHierarchy);

Jene connais aucunefonction quifasse ce que vous voulez,mais vouspouvez créer quelque chose comme ceci:

 <ul>
    <?php $hiterms = get_terms("my_tax", array("orderby" => "slug", "parent" => 0)); ?>
    <?php foreach($hiterms as $key => $hiterm) : ?>
        <li>
            <?php echo $hiterm->name; ?>
            <?php $loterms = get_terms("my_tax", array("orderby" => "slug", "parent" => $hiterm->term_id)); ?>
            <?php if($loterms) : ?>
                <ul>
                    <?php foreach($loterms as $key => $loterm) : ?>
                        <li><?php echo $loterm->name; ?></li>
                    <?php endforeach; ?>
                </ul>
            <?php endif; ?>
        </li>
    <?php endforeach; ?>
</ul>
 

Jen'aipastesté cela,mais vouspouvez voir oùje veuxen venir. Le code ci-dessusne vous donnera que deuxniveaux

EDIT: ahh oui vouspouvez utiliser wp_list_categories ()pourfaire ce que vous voulez.

I dont know of any function that does what you want but you can build up something like this:

<ul>
    <?php $hiterms = get_terms("my_tax", array("orderby" => "slug", "parent" => 0)); ?>
    <?php foreach($hiterms as $key => $hiterm) : ?>
        <li>
            <?php echo $hiterm->name; ?>
            <?php $loterms = get_terms("my_tax", array("orderby" => "slug", "parent" => $hiterm->term_id)); ?>
            <?php if($loterms) : ?>
                <ul>
                    <?php foreach($loterms as $key => $loterm) : ?>
                        <li><?php echo $loterm->name; ?></li>
                    <?php endforeach; ?>
                </ul>
            <?php endif; ?>
        </li>
    <?php endforeach; ?>
</ul>

I haven't tested this but you can see what I'm getting at. What the above code will do is give you only two levels

EDIT: ahh yes you can use wp_list_categories() to do what you after.

Vouspouvez utiliser wp_list_categories (),avec un argument 'taxonomie'.

You can use wp_list_categories(), with a 'taxonomy' argument.

Le code suivantgénérera une liste déroulante avec destermes,maispeut égalementgénérertout autre élément/structureen éditant la variable $ outputTemplateet en éditant les lignes str_replace:

 function get_terms_hierarchical($terms, $output = '', $parent_id = 0, $level = 0) {
    //Out Template
    $outputTemplate = '<option value="%ID%">%PADDING%%NAME%</option>';

    foreach ($terms as $term) {
        if ($parent_id == $term->parent) {
            //Replacing the template variables
            $itemOutput = str_replace('%ID%', $term->term_id, $outputTemplate);
            $itemOutput = str_replace('%PADDING%', str_pad('', $level*12, '&nbsp;&nbsp;'), $itemOutput);
            $itemOutput = str_replace('%NAME%', $term->name, $itemOutput);

            $output .= $itemOutput;
            $output = get_terms_hierarchical($terms, $output, $term->term_id, $level + 1);
        }
    }
    return $output;
}

$terms = get_terms('taxonomy', array('hide_empty' => false));
$output = get_terms_hierarchical($terms);

echo '<select>' . $output . '</select>';  
 

The following code will generate drop-down with terms, but also can generate any other element/structure by editing the $outputTemplate variable, and editing str_replace lines:

function get_terms_hierarchical($terms, $output = '', $parent_id = 0, $level = 0) {
    //Out Template
    $outputTemplate = '<option value="%ID%">%PADDING%%NAME%</option>';

    foreach ($terms as $term) {
        if ($parent_id == $term->parent) {
            //Replacing the template variables
            $itemOutput = str_replace('%ID%', $term->term_id, $outputTemplate);
            $itemOutput = str_replace('%PADDING%', str_pad('', $level*12, '&nbsp;&nbsp;'), $itemOutput);
            $itemOutput = str_replace('%NAME%', $term->name, $itemOutput);

            $output .= $itemOutput;
            $output = get_terms_hierarchical($terms, $output, $term->term_id, $level + 1);
        }
    }
    return $output;
}

$terms = get_terms('taxonomy', array('hide_empty' => false));
$output = get_terms_hierarchical($terms);

echo '<select>' . $output . '</select>';  

Commeje cherchais lamême chosemaispour obtenir lestermes d'un article,j'aifinalement compilé ceci,et celafonctionnepourmoi.

Ce qu'ilfait:
•il obtienttous lestermes d'unnom detaxonomiepour un article spécifique.
•pour unetaxonomie hiérarchique à deuxniveaux (ex:niveau1: 'pays'et niveau2: 'villes'),il crée un h4 avec leniveau1 suivi d'une liste ul deniveau2et cepourtous les éléments deniveau1.
• si lataxonomien'estpas hiérarchique,ellene créera qu'une liste ul detous les éléments. voici le code (je l'écrispourmoi doncj'aiessayé d'être aussigénérique quepossiblemais ...):

 function finishingLister($heTerm){
    $myterm = $heTerm;
    $terms = get_the_terms($post->ID,$myterm);
    if($terms){
        $count = count($terms);
        echo '<h3>'.$myterm;
        echo ((($count>1)&&(!endswith($myterm, 's')))?'s':"").'</h3>';
        echo '<div class="'.$myterm.'Wrapper">';
        foreach ($terms as $term) {
            if (0 == $term->parent) $parentsItems[] = $term;
            if ($term->parent) $childItems[] = $term; 
        };
        if(is_taxonomy_hierarchical( $heTerm )){
            foreach ($parentsItems as $parentsItem){
                echo '<h4>'.$parentsItem->name.'</h4>';
                echo '<ul>';
                foreach($childItems as $childItem){
                    if ($childItem->parent == $parentsItem->term_id){
                        echo '<li>'.$childItem->name.'</li>';
                    };
                };
                echo '</ul>';
            };
        }else{
            echo '<ul>';
            foreach($parentsItems as $parentsItem){
                echo '<li>'.$parentsItem->name.'</li>';
            };
            echo '</ul>';
        };
        echo '</div>';
    };
};
 

Doncfinalement vous appelez lafonction avec ceci (évidemment,vous remplacezma_taxonomiepar la vôtre): finishingLister('my_taxonomy');

Jene prétendspas que c'estparfait,mais commeje l'ai dit,celafonctionnepourmoi.

As I was looking for the same but to get terms of one post, finally I compiled this, and it works for me.

What it does :
• it gets all terms of a taxonomy name for a specific post.
• for a hierachical taxonomy with two levels (ex: level1:'country' and level2:'cities'), it creates a h4 with the level1 followed by an ul list of level2 and this for all level1 items.
• if the taxonomy is not hierarchical, it will create only an ul list of all items. here is the code (I write it for me so I tried to be as generic as I can but...) :

function finishingLister($heTerm){
    $myterm = $heTerm;
    $terms = get_the_terms($post->ID,$myterm);
    if($terms){
        $count = count($terms);
        echo '<h3>'.$myterm;
        echo ((($count>1)&&(!endswith($myterm, 's')))?'s':"").'</h3>';
        echo '<div class="'.$myterm.'Wrapper">';
        foreach ($terms as $term) {
            if (0 == $term->parent) $parentsItems[] = $term;
            if ($term->parent) $childItems[] = $term; 
        };
        if(is_taxonomy_hierarchical( $heTerm )){
            foreach ($parentsItems as $parentsItem){
                echo '<h4>'.$parentsItem->name.'</h4>';
                echo '<ul>';
                foreach($childItems as $childItem){
                    if ($childItem->parent == $parentsItem->term_id){
                        echo '<li>'.$childItem->name.'</li>';
                    };
                };
                echo '</ul>';
            };
        }else{
            echo '<ul>';
            foreach($parentsItems as $parentsItem){
                echo '<li>'.$parentsItem->name.'</li>';
            };
            echo '</ul>';
        };
        echo '</div>';
    };
};

So finally you call the function with this (obviously, you replace my_taxonomy by yours) : finishingLister('my_taxonomy');

I don't pretend it's perfect but as I said it works for me.

J'aieu ceproblèmeet aucune des réponsesicin'afonctionnépourmoi,pour une raison ou une autre.

Voicima versionmise àjouret fonctionnelle.

 function locationSelector( $fieldName ) {
    $args = array('hide_empty' => false, 'hierarchical' => true, 'parent' => 0); 
    $terms = get_terms("locations", $args);

    $html = '';
    $html .= '<select name="' . $fieldName . '"' . 'class="chosen-select ' . $fieldName . '"' . '>';
        foreach ( $terms as $term ) {
            $html .= '<option value="' . $term->term_id . '">' . $term->name . '</option>';

            $args = array(
                'hide_empty'    => false, 
                'hierarchical'  => true, 
                'parent'        => $term->term_id
            ); 
            $childterms = get_terms("locations", $args);

            foreach ( $childterms as $childterm ) {
                $html .= '<option value="' . $childterm->term_id . '">' . $term->name . ' > ' . $childterm->name . '</option>';

                $args = array('hide_empty' => false, 'hierarchical'  => true, 'parent' => $childterm->term_id); 
                $granchildterms = get_terms("locations", $args);

                foreach ( $granchildterms as $granchild ) {
                    $html .= '<option value="' . $granchild->term_id . '">' . $term->name . ' > ' . $childterm->name . ' > ' . $granchild->name . '</option>';
                }
            }
        }
    $html .=  "</select>";

    return $html;
}
 

Et utilisation:

 $selector = locationSelector('locationSelectClass');
echo $selector;
 

I had this problem and none of the answers here worked for me, for one reason or another.

Here is my updated and working version.

function locationSelector( $fieldName ) {
    $args = array('hide_empty' => false, 'hierarchical' => true, 'parent' => 0); 
    $terms = get_terms("locations", $args);

    $html = '';
    $html .= '<select name="' . $fieldName . '"' . 'class="chosen-select ' . $fieldName . '"' . '>';
        foreach ( $terms as $term ) {
            $html .= '<option value="' . $term->term_id . '">' . $term->name . '</option>';

            $args = array(
                'hide_empty'    => false, 
                'hierarchical'  => true, 
                'parent'        => $term->term_id
            ); 
            $childterms = get_terms("locations", $args);

            foreach ( $childterms as $childterm ) {
                $html .= '<option value="' . $childterm->term_id . '">' . $term->name . ' > ' . $childterm->name . '</option>';

                $args = array('hide_empty' => false, 'hierarchical'  => true, 'parent' => $childterm->term_id); 
                $granchildterms = get_terms("locations", $args);

                foreach ( $granchildterms as $granchild ) {
                    $html .= '<option value="' . $granchild->term_id . '">' . $term->name . ' > ' . $childterm->name . ' > ' . $granchild->name . '</option>';
                }
            }
        }
    $html .=  "</select>";

    return $html;
}

And usage:

$selector = locationSelector('locationSelectClass');
echo $selector;

J'ai utilisé du code @popsi quifonctionnaittrèsbien etje l'ai renduplusefficaceet plusfacile à lire:

 /**
 * Recursively sort an array of taxonomy terms hierarchically. Child categories will be
 * placed under a 'children' member of their parent term.
 * @param Array   $cats     taxonomy term objects to sort
 * @param integer $parentId the current parent ID to put them in
 */
function sort_terms_hierarchicaly(Array $cats, $parentId = 0)
{
    $into = [];
    foreach ($cats as $i => $cat) {
        if ($cat->parent == $parentId) {
            $cat->children = sort_terms_hierarchicaly($cats, $cat->term_id);
            $into[$cat->term_id] = $cat;
        }
    }
    return $into;
}
 

Utilisation:

 $sorted_terms = sort_terms_hierarchicaly($terms);
 

I used @popsi code that was working really well and I made it a more efficient and easy to read:

/**
 * Recursively sort an array of taxonomy terms hierarchically. Child categories will be
 * placed under a 'children' member of their parent term.
 * @param Array   $cats     taxonomy term objects to sort
 * @param integer $parentId the current parent ID to put them in
 */
function sort_terms_hierarchicaly(Array $cats, $parentId = 0)
{
    $into = [];
    foreach ($cats as $i => $cat) {
        if ($cat->parent == $parentId) {
            $cat->children = sort_terms_hierarchicaly($cats, $cat->term_id);
            $into[$cat->term_id] = $cat;
        }
    }
    return $into;
}

Usage :

$sorted_terms = sort_terms_hierarchicaly($terms);

Cette solutionestmoinsefficace que le code de @popsi,carellefait unenouvelle requêtepour chaqueterme,maiselleest égalementplusfacile à utiliser dans unmodèle. Si votre site Web utilise lamiseen cache,vouspouvez,commemoi,ne pas vous soucier de la légère surcharge de labase de données.

Vousn'avezpasbesoin depréparer untableau qui sera rempli récursivement determes. Vous l'appelez simplement de lamêmemanière que vous appelleriez get_terms () (lenon-forme obsolète avec seulement untableaupour un argument). Il renvoie untableau d'objets WP_Term avec unepropriété supplémentaire appelée children.

 function get_terms_tree( Array $args ) {
    $new_args = $args;
    $new_args['parent'] = $new_args['parent'] ?? 0;
    $new_args['fields'] = 'all';

    // The terms for this level
    $terms = get_terms( $new_args );

    // The children of each term on this level
    foreach( $terms as &$this_term ) {
        $new_args['parent'] = $this_term->term_id;
        $this_term->children = get_terms_tree( $new_args );
    }

    return $terms;
}
 

L'utilisationest simple:

 $terms = get_terms_tree([ 'taxonomy' => 'my-tax' ]);
 

This solution is less efficient than @popsi's code, since it makes a new query for every term, but it's also easier to use in a template. If your website uses caching, you may, like me, not mind the slight database overhead.

You don't need to prepare an array that'll be recursively filled with terms. You just call it the same way you would call get_terms() (the non-deprecated form with only an array for an argument). It returns an array of WP_Term objects with an extra property called children.

function get_terms_tree( Array $args ) {
    $new_args = $args;
    $new_args['parent'] = $new_args['parent'] ?? 0;
    $new_args['fields'] = 'all';

    // The terms for this level
    $terms = get_terms( $new_args );

    // The children of each term on this level
    foreach( $terms as &$this_term ) {
        $new_args['parent'] = $this_term->term_id;
        $this_term->children = get_terms_tree( $new_args );
    }

    return $terms;
}

Usage is simple:

$terms = get_terms_tree([ 'taxonomy' => 'my-tax' ]);

Assurez-vous que hierarchical=trueesttransmis à votre get_terms() appeler.

Notez que hierarchical=trueest la valeurpar défaut,alors vraiment,assurez-vous simplement qu'ellen'apas été remplacéepour être false.

Be sure that hierarchical=true is passed to your get_terms() call.

Note that hierarchical=true is the default, so really, just be sure that it hasn't been overridden to be false.

Ici,j'ai une liste de sélection déroulante à quatreniveaux avec lepremier élémentmasqué

 <select name="lokalizacja" id="ucz">
            <option value="">Wszystkie lokalizacje</option>
            <?php
            $excluded_term = get_term_by('slug', 'podroze', 'my_travels_places');
            $args = array(
                'orderby' => 'slug',
                'hierarchical' => 'true',
                'exclude' => $excluded_term->term_id,
                'hide_empty' => '0',
                'parent' => $excluded_term->term_id,
            );              
            $hiterms = get_terms("my_travels_places", $args);
            foreach ($hiterms AS $hiterm) :
                echo "<option value='".$hiterm->slug."'".($_POST['my_travels_places'] == $hiterm->slug ? ' selected="selected"' : '').">".$hiterm->name."</option>\n";

                $loterms = get_terms("my_travels_places", array("orderby" => "slug", "parent" => $hiterm->term_id,'hide_empty' => '0',));
                if($loterms) :
                    foreach($loterms as $key => $loterm) :

                    echo "<option value='".$loterm->slug."'".($_POST['my_travels_places'] == $loterm->slug ? ' selected="selected"' : '').">&nbsp;-&nbsp;".$loterm->name."</option>\n";

                    $lo2terms = get_terms("my_travels_places", array("orderby" => "slug", "parent" => $loterm->term_id,'hide_empty' => '0',));
                    if($lo2terms) :
                        foreach($lo2terms as $key => $lo2term) :

                        echo "<option value='".$lo2term->slug."'".($_POST['my_travels_places'] == $lo2term->slug ? ' selected="selected"' : '').">&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;".$lo2term->name."</option>\n";



                        endforeach;
                    endif;

                    endforeach;
                endif;

            endforeach;
            ?>
         </select>
        <label>Wybierz rodzaj miejsca</label>
        <select name="rodzaj_miejsca" id="woj">
            <option value="">Wszystkie rodzaje</option>
            <?php
            $theterms = get_terms('my_travels_places_type', 'orderby=name');
            foreach ($theterms AS $term) :
                echo "<option value='".$term->slug."'".($_POST['my_travels_places_type'] == $term->slug ? ' selected="selected"' : '').">".$term->name."</option>\n";                   
            endforeach;
            ?>
         </select>
 

Here I have four level dropdown select list with hidden first item

<select name="lokalizacja" id="ucz">
            <option value="">Wszystkie lokalizacje</option>
            <?php
            $excluded_term = get_term_by('slug', 'podroze', 'my_travels_places');
            $args = array(
                'orderby' => 'slug',
                'hierarchical' => 'true',
                'exclude' => $excluded_term->term_id,
                'hide_empty' => '0',
                'parent' => $excluded_term->term_id,
            );              
            $hiterms = get_terms("my_travels_places", $args);
            foreach ($hiterms AS $hiterm) :
                echo "<option value='".$hiterm->slug."'".($_POST['my_travels_places'] == $hiterm->slug ? ' selected="selected"' : '').">".$hiterm->name."</option>\n";

                $loterms = get_terms("my_travels_places", array("orderby" => "slug", "parent" => $hiterm->term_id,'hide_empty' => '0',));
                if($loterms) :
                    foreach($loterms as $key => $loterm) :

                    echo "<option value='".$loterm->slug."'".($_POST['my_travels_places'] == $loterm->slug ? ' selected="selected"' : '').">&nbsp;-&nbsp;".$loterm->name."</option>\n";

                    $lo2terms = get_terms("my_travels_places", array("orderby" => "slug", "parent" => $loterm->term_id,'hide_empty' => '0',));
                    if($lo2terms) :
                        foreach($lo2terms as $key => $lo2term) :

                        echo "<option value='".$lo2term->slug."'".($_POST['my_travels_places'] == $lo2term->slug ? ' selected="selected"' : '').">&nbsp;&nbsp;&nbsp;&nbsp;-&nbsp;".$lo2term->name."</option>\n";



                        endforeach;
                    endif;

                    endforeach;
                endif;

            endforeach;
            ?>
         </select>
        <label>Wybierz rodzaj miejsca</label>
        <select name="rodzaj_miejsca" id="woj">
            <option value="">Wszystkie rodzaje</option>
            <?php
            $theterms = get_terms('my_travels_places_type', 'orderby=name');
            foreach ($theterms AS $term) :
                echo "<option value='".$term->slug."'".($_POST['my_travels_places_type'] == $term->slug ? ' selected="selected"' : '').">".$term->name."</option>\n";                   
            endforeach;
            ?>
         </select>