get_meta_keys(): string[]

Returns a list of previously defined keys.

Return

string[] Array of meta key names.

Source

function get_meta_keys() {
	global $wpdb;

	$keys = $wpdb->get_col(
		"SELECT meta_key
		FROM $wpdb->postmeta
		GROUP BY meta_key
		ORDER BY meta_key"
	);

	return $keys;
}

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Uses	Description
wpdb::get_col()`wp-includes/class-wpdb.php`	Retrieves one column from the database.

Changelog

Version	Description
1.2.0	Introduced.

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get_meta_keys(): string[]

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