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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 |
---|---|
368 | if ( 'siteurl' == $option->option_name ) |
369 | $option->option_value = preg_replace('|/+$|', '', $option->option_value); |
370 | if ( 'home' == $option->option_name ) |
371 | $option->option_value = preg_replace('|/+$|', '', $option->option_value); |
372 | if ( 'category_base' == $option->option_name ) |
373 | $option->option_value = preg_replace('|/+$|', '', $option->option_value); |
374 | $value = maybe_unserialize($option->option_value); |
375 | $all_options->{$option->option_name} = apply_filters('pre_option_' . $option->option_name, $value); |
376 | } |
377 | return apply_filters('all_options', $all_options); |
378 | } |
379 |
|
380 | // expects $option_name to NOT be SQL-escaped |
381 | function update_option($option_name, $newvalue) { |
382 | global $wpdb; |
383 |
|
384 | $safe_option_name = $wpdb->escape($option_name); |
385 |
|
386 | if ( is_string($newvalue) ) |