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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.
Line | Code |
---|---|
2582 | * |
2583 | * The dynamic portion of the hook name, `$transient`, refers to the transient name. |
2584 | * |
2585 | * @since 4.4.0 |
2586 | * |
2587 | * @param int $expiration Time until expiration in seconds. Use 0 for no expiration. |
2588 | * @param mixed $value New value of site transient. |
2589 | * @param string $transient Transient name. |
2590 | */ |
2591 | $expiration = apply_filters( "expiration_of_site_transient_{$transient}", $expiration, $value, $transient ); |
2592 |
|
2593 | if ( wp_using_ext_object_cache() || wp_installing() ) { |
2594 | $result = wp_cache_set( $transient, $value, 'site-transient', $expiration ); |
2595 | } else { |
2596 | $transient_timeout = '_site_transient_timeout_' . $transient; |
2597 | $option = '_site_transient_' . $transient; |
2598 | wp_prime_site_option_caches( array( $option, $transient_timeout ) ); |
2599 |
|
2600 | if ( false === get_site_option( $option ) ) { |