tag_exists( int|string $tag_name )

Checks whether a post tag with a given name exists.

Parameters

$tag_name: (Required)

Return

(mixed) Returns null if the term does not exist.<br> Returns an array of the term ID and the term taxonomy ID if the pairing exists.<br> Returns 0 if term ID 0 is passed to the function.

Source

File: wp-admin/includes/taxonomy.php

function tag_exists($tag_name) {
	return term_exists($tag_name, 'post_tag');
}

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Uses

Uses
Uses	Description
wp-includes/taxonomy.php: term_exists()	Determines whether a taxonomy term exists.

Changelog

Changelog
Version	Description
2.3.0	Introduced.