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Description

Get a list of previously defined keys.

Usage

$mixed = get_meta_keys();

Parameters

Returns

mixed

Source

File name: wordpress/wp-admin/includes/post.php
Lines:

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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