CODEWITHSUNDEEP
phpwordpress
zeni1agent
zeni1agent

Reputation: 197

How to prevent users from creating new tags?

I created the code to update the tags in the current post.

$tags = get_the_tags();  
if( current_user_can('author') || current_user_can('editor') || current_user_can('administrator') ){  
    if ($tags > 0){  

    foreach ($tags as $tag){  
        $list_tag .= "{$tag->name}, ";  
}
        $tag_edit = '
        <form method="POST">
        <textarea class="textarea_post_tag" name="post_get_tags" id="RRR">
        '.$list_tag.'
        </textarea>
        <input type="submit" value="Upgrade">
        </form>
        ';   
    echo $tag_edit  ;
}}

if ($_POST['post_get_tags']){    
    wp_set_post_tags( $post->ID, $_POST['post_get_tags']  );  
}

But I need that when editing tags

If the post does not contain the specified tags in the database,

then instead of the tag was displayed ""

Example

if the textarea was entered

tag-existing, tag-new, tag-existing,

then it would be displayed

tag-existing, tag-existing,

Upvotes: 0

Views: 204

Answers (1)

gomd
gomd

Reputation: 279

With something like that you should be able to do it (code explained in the comments):

<?php
if ($_POST['post_get_tags'])
{
    // Split post_get_tags string into an array using the comma as delimiter.
    $tags_got_exploded = explode(',', $_POST['post_get_tags']);
    // Remove whitespaces from every value of the array (we want a clean tag name for each value of the array).
    $tags_got_exploded = array_map('trim', $tags_got_exploded);

    /*
     * Get an array with all the tags allowed to be added.
     * get_tags https://codex.wordpress.org/Function_Reference/get_tags
     * Returns a multidimensional array where the column_key "name" contains the tag name
     * Just return an array with tag names allowed
     */
    $tags_allowed = array_column(get_tags(), 'name');

    // Iterate over every tag got
    foreach ($tags_got_exploded as $key => &$tag_got)
    {
        // If the tag got is not inside the array with all the tags allowed to be added.
        if (!in_array($tag_got, $tags_allowed))
            // Remove the tag.
            unset($tags_got_exploded[$key]);
    }

    // Join tag got elements (cleaned and checked).
    $tags_got = implode(', ', $tags_got_exploded);

    wp_set_post_tags($post->ID, $tags_got);
}

p.s. You should check the set of $_POST variables through the isset() function

if (isset($_POST['post_get_tags']))

Upvotes: 1

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