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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 |
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578 |
|
579 | // Make sure the option doesn't already exist. We can check the 'notoptions' cache before we ask for a db query |
580 | $notoptions = wp_cache_get( 'notoptions', 'options' ); |
581 | if ( !is_array( $notoptions ) || !isset( $notoptions[$name] ) ) |
582 | if ( false !== get_option( $safe_name ) ) |
583 | return; |
584 |
|
585 | $value = maybe_serialize( $value ); |
586 | $autoload = ( 'no' === $autoload ) ? 'no' : 'yes'; |
587 | do_action( 'add_option', $name, $value ); |
588 | if ( 'yes' == $autoload ) { |
589 | $alloptions = wp_load_alloptions(); |
590 | $alloptions[$name] = $value; |
591 | wp_cache_set( 'alloptions', $alloptions, 'options' ); |
592 | } else { |
593 | wp_cache_set( $name, $value, 'options' ); |
594 | } |
595 |
|
596 | // This option exists now |