Sometime WordPress Developer need to know Category ID, I will show you how to find Category ID using the Category Slug in WordPress, this tricks is original by Bavotasan and I rewrite it.

WordPress built in with nicely functions get_term_by(), and we will use it to get Category ID based on Category Slug. Here we go what we can do with get_term_by()

<?php get_term_by( $field, $value, $taxonomy, $output, $filter ) ?>

$field: (string) (required) Either ’slug’, ‘name’, or ‘id’. Default: None
$value: (string|integer) (required) Search for this term value. Default: None
$taxonomy: (string) (required) Taxonomy Name. Default: None
$output: (string) (optional) Constant OBJECT, ARRAY_A, or ARRAY_N. Default: OBJECT
$filter: (string) (optional) default is raw or no WordPress defined filter will applied. Default: ‘raw’

Let’s get practice by adding this code to get Category ID based on Category Slug

<?php
$theCatId = get_term_by( 'slug', 'tutorials', 'category' );
$theCatId = $theCatId->term_id;
?>

What’s for this Category ID? It depend on you, you can use it to add extra query or display category description. Next code is how to display category description using Category Slug

<?php
$theCatId = get_term_by( 'slug', 'tutorials', 'category' );
$theCatId = $theCatId->description;
?>

Of course you can make this code more useful, use your creativity and explore wordpress tricks and Create better code to get Category ID based on Category Slug. Learn WordPress everyday and you’ll more enjoy with it

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