the_category_ID

Returns or prints a category ID.

Description

(int) the_category_ID( (constant) $echo = true );

Returns (int)

Category ID.

Parameters (1)

0. $echo — Optional. (constant) => true: Whether to echo the output. Default true.

Usage

if ( !function_exists( 'the_category_ID' ) ) { 
    require_once ABSPATH . WPINC . '/deprecated.php'; 
} 
  
// Optional. Whether to echo the output. Default true. 
$echo = true; 
  
// NOTICE! Understand what this does before running. 
$result = the_category_ID($echo);

Defined (1)

The function is defined in the following location(s).

/wp-includes/deprecated.php

function the_category_ID($echo = true) { 
    _deprecated_function( __FUNCTION__, '0.71', 'get_the_category()' ); 
 
    // Grab the first cat in the list. 
    $categories = get_the_category(); 
    $cat = $categories[0]->term_id; 
 
    if ( $echo ) 
        echo $cat; 
 
    return $cat; 
}