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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
This hook occurs 2 times in this file.
| Line | Code |
|---|---|
| 1320 | * |
| 1321 | * @link https://api.wordpress.org/secret-key/1.1/salt/ Create secrets for wp-config.php |
| 1322 | * |
| 1323 | * @param string $scheme Authentication scheme (auth, secure_auth, logged_in, nonce) |
| 1324 | * @return string Salt value |
| 1325 | */ |
| 1326 | function wp_salt( $scheme = 'auth' ) { |
| 1327 | static $cached_salts = array(); |
| 1328 | if ( isset( $cached_salts[ $scheme ] ) ) |
| 1329 | return apply_filters( 'salt', $cached_salts[ $scheme ], $scheme ); |
| 1330 | |
| 1331 | static $duplicated_keys; |
| 1332 | if ( null === $duplicated_keys ) { |
| 1333 | $duplicated_keys = array( 'put your unique phrase here' => true ); |
| 1334 | foreach ( array( 'AUTH', 'SECURE_AUTH', 'LOGGED_IN', 'NONCE', 'SECRET' ) as $first ) { |
| 1335 | foreach ( array( 'KEY', 'SALT' ) as $second ) { |
| 1336 | if ( ! defined( "{$first}_{$second}" ) ) |
| 1337 | continue; |
| 1338 | $value = constant( "{$first}_{$second}" ); |
| Line | Code |
| 1366 | if ( ! $key ) { |
| 1367 | $key = wp_generate_password( 64, true, true ); |
| 1368 | update_site_option( 'secret_key', $key ); |
| 1369 | } |
| 1370 | } |
| 1371 | $salt = hash_hmac( 'md5', $scheme, $key ); |
| 1372 | } |
| 1373 | |
| 1374 | $cached_salts[ $scheme ] = $key . $salt; |
| 1375 | return apply_filters( 'salt', $cached_salts[ $scheme ], $scheme ); |
| 1376 | } |
| 1377 | endif; |
| 1378 | |
| 1379 | if ( !function_exists('wp_hash') ) : |
| 1380 | /** |
| 1381 | * Get hash of given string. |
| 1382 | * |
| 1383 | * @since 2.0.3 |
| 1384 | * @uses wp_salt() Get WordPress salt |