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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 |
---|---|
3985 | * |
3986 | * @param string $transient Transient name. Expected to not be SQL-escaped. |
3987 | * @param mixed $value Transient value. Expected to not be SQL-escaped. |
3988 | * @param int $expiration Time until expiration in seconds, default 0 |
3989 | * @return bool False if value was not set and true if value was set. |
3990 | */ |
3991 | function set_site_transient( $transient, $value, $expiration = 0 ) { |
3992 | global $_wp_using_ext_object_cache; |
3993 |
|
3994 | $value = apply_filters( 'pre_set_site_transient_' . $transient, $value ); |
3995 |
|
3996 | if ( $_wp_using_ext_object_cache ) { |
3997 | $result = wp_cache_set( $transient, $value, 'site-transient', $expiration ); |
3998 | } else { |
3999 | $transient_timeout = '_site_transient_timeout_' . $transient; |
4000 | $transient = '_site_transient_' . $transient; |
4001 | if ( false === get_site_option( $transient ) ) { |
4002 | if ( $expiration ) |
4003 | add_site_option( $transient_timeout, time() + $expiration ); |