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I have a arbitrary string and want to check if a post with that slug string exists in the site. I tried to find a way to list all slugs, but can't find such a thing. Thanks

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3 Answers 3

Do you mean post slug? You can try to make use of wp_unique_post_slug() that WP uses to generate those. If I remember right if slug you are trying to use is not unique it will be returned with numerical index appended.

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sorry to reply so late. Yes post slug is the slug I want. Unfortunately I don't have the post_id which is required to use wp_unique_post_slug() –  lulalala Aug 22 '11 at 1:43
I couldn't figure out how to use wp_unique_post_slug to do this anyway. It does really check to see if a slug exists, as much as create one. I could be wrong or misinterpreting something but in my testing it would not check if something already existed. –  Nathan May 14 '14 at 23:20
$args = array('name' => $slugName, 'post_type' => $postType); 

$slug_query = new WP_Query($args);
echo "<pre>";

You then have more than enough information to test if a post was returned or not, hope this helps.

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How this will extract slug uniqueness? –  Rahil Wazir Feb 12 '14 at 21:09

This is what you're looking for, tested and I use it on my own sites:

function the_slug_exists($post_name) {
    global $wpdb;
    if($wpdb->get_row("SELECT post_name FROM wp_posts WHERE post_name = '" . $post_name . "'", 'ARRAY_A')) {
        return true;
    } else {
        return false;

You can then use it like this:

if (the_slug_exists('contact')) {
    // do something

Replace contact with whatever slug you want to test for.

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