php - How to separate categories with commas?

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I have this function that displays the specified hierarchy level category of a post. For example <?php display_cat_level(0,true); ?> will display the top/parent category, while <?php display_cat_level(2,true); ?> will display the second child category.

If the post has more than one category in any given level then the categories will be displayed inline with no spaces or commas between them like this cat1acat1bcat1c instead of cat1a, cat1b, cat1c. How would I update the function to comma separate multiple categories displayed?

function get_level($category, $level = 0)
{
    if ($category->parent == 0) {
        return $level;
    } else {
        $level++;
        $category = get_term( $category->parent );
        return get_level($category, $level);
    }
}

function display_cat_level( $level = 0 , $link=false){

    $cats = get_the_terms( null, 'category' );
    if( $cats ){
        foreach($cats as $cat){
            $current_cat_level = get_level($cat);
            if( $current_cat_level  == $level ){
                if($link==true) {
                    echo '<a href="'.get_term_link( $cat->term_id ).'">'.$cat->name."</a>";
                } else {
                    echo $cat->name."";
                }
            }
        }
    }
}

I have this function that displays the specified hierarchy level category of a post. For example <?php display_cat_level(0,true); ?> will display the top/parent category, while <?php display_cat_level(2,true); ?> will display the second child category.

If the post has more than one category in any given level then the categories will be displayed inline with no spaces or commas between them like this cat1acat1bcat1c instead of cat1a, cat1b, cat1c. How would I update the function to comma separate multiple categories displayed?

function get_level($category, $level = 0)
{
    if ($category->parent == 0) {
        return $level;
    } else {
        $level++;
        $category = get_term( $category->parent );
        return get_level($category, $level);
    }
}

function display_cat_level( $level = 0 , $link=false){

    $cats = get_the_terms( null, 'category' );
    if( $cats ){
        foreach($cats as $cat){
            $current_cat_level = get_level($cat);
            if( $current_cat_level  == $level ){
                if($link==true) {
                    echo '<a href="'.get_term_link( $cat->term_id ).'">'.$cat->name."</a>";
                } else {
                    echo $cat->name."";
                }
            }
        }
    }
}

• php
• categories

Share Improve this question edited Nov 25, 2018 at 8:30 Krzysiek Dróżdż 25.6k99 gold badges5353 silver badges7474 bronze badges asked Nov 25, 2018 at 7:46 PetePete 1,05822 gold badges1414 silver badges4040 bronze badges

Add a comment  | 

1 Answer 1

Sorted by: Reset to default 1

All you have to do is to track if you already echoed some category and add a comma in such case:

function get_level($category, $level = 0) {
    if ($category->parent == 0) {
        return $level;
    }

    $category = get_term( $category->parent );
    return get_level( $category, $level + 1 );
}

function display_cat_level( $level = 0, $link = false) {
    $cats = get_the_terms( null, 'category' );
    $echoed = 0;

    if ( $cats ) {
        foreach ( $cats as $cat ) {
            $current_cat_level = get_level( $cat );
            if ( $current_cat_level  == $level ) {
                if ( $echoed ) {
                    echo ', ';
                }
                if ( true == $link ) {
                    echo '<a href="' . get_term_link( $cat->term_id ) . '">' . esc_html( $cat->name ) . "</a>";
                } else {
                    echo esc_html( $cat->name );
                }
                $echoed++;
            }
        }
    }
}

PS. I've also simplified your get_level function a little bit and added some html escaping in display_cat_level.

I have this function that displays the specified hierarchy level category of a post. For example <?php display_cat_level(0,true); ?> will display the top/parent category, while <?php display_cat_level(2,true); ?> will display the second child category.

If the post has more than one category in any given level then the categories will be displayed inline with no spaces or commas between them like this cat1acat1bcat1c instead of cat1a, cat1b, cat1c. How would I update the function to comma separate multiple categories displayed?

function get_level($category, $level = 0)
{
    if ($category->parent == 0) {
        return $level;
    } else {
        $level++;
        $category = get_term( $category->parent );
        return get_level($category, $level);
    }
}

function display_cat_level( $level = 0 , $link=false){

    $cats = get_the_terms( null, 'category' );
    if( $cats ){
        foreach($cats as $cat){
            $current_cat_level = get_level($cat);
            if( $current_cat_level  == $level ){
                if($link==true) {
                    echo '<a href="'.get_term_link( $cat->term_id ).'">'.$cat->name."</a>";
                } else {
                    echo $cat->name."";
                }
            }
        }
    }
}

I have this function that displays the specified hierarchy level category of a post. For example <?php display_cat_level(0,true); ?> will display the top/parent category, while <?php display_cat_level(2,true); ?> will display the second child category.

If the post has more than one category in any given level then the categories will be displayed inline with no spaces or commas between them like this cat1acat1bcat1c instead of cat1a, cat1b, cat1c. How would I update the function to comma separate multiple categories displayed?

function get_level($category, $level = 0)
{
    if ($category->parent == 0) {
        return $level;
    } else {
        $level++;
        $category = get_term( $category->parent );
        return get_level($category, $level);
    }
}

function display_cat_level( $level = 0 , $link=false){

    $cats = get_the_terms( null, 'category' );
    if( $cats ){
        foreach($cats as $cat){
            $current_cat_level = get_level($cat);
            if( $current_cat_level  == $level ){
                if($link==true) {
                    echo '<a href="'.get_term_link( $cat->term_id ).'">'.$cat->name."</a>";
                } else {
                    echo $cat->name."";
                }
            }
        }
    }
}

• php
• categories

Share Improve this question edited Nov 25, 2018 at 8:30 Krzysiek Dróżdż 25.6k99 gold badges5353 silver badges7474 bronze badges asked Nov 25, 2018 at 7:46 PetePete 1,05822 gold badges1414 silver badges4040 bronze badges

Add a comment  | 

1 Answer 1

Sorted by: Reset to default 1

All you have to do is to track if you already echoed some category and add a comma in such case:

function get_level($category, $level = 0) {
    if ($category->parent == 0) {
        return $level;
    }

    $category = get_term( $category->parent );
    return get_level( $category, $level + 1 );
}

function display_cat_level( $level = 0, $link = false) {
    $cats = get_the_terms( null, 'category' );
    $echoed = 0;

    if ( $cats ) {
        foreach ( $cats as $cat ) {
            $current_cat_level = get_level( $cat );
            if ( $current_cat_level  == $level ) {
                if ( $echoed ) {
                    echo ', ';
                }
                if ( true == $link ) {
                    echo '<a href="' . get_term_link( $cat->term_id ) . '">' . esc_html( $cat->name ) . "</a>";
                } else {
                    echo esc_html( $cat->name );
                }
                $echoed++;
            }
        }
    }
}

PS. I've also simplified your get_level function a little bit and added some html escaping in display_cat_level.

本文标签： phpHow to separate categories with commas