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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 |
|---|---|
| 285 | // never underestimate the ingenuity of the fools :)" -- Dougal |
| 286 | if ('siteurl' == $option->option_name) $option->option_value = preg_replace('|/+$|', '', $option->option_value); |
| 287 | if ('home' == $option->option_name) $option->option_value = preg_replace('|/+$|', '', $option->option_value); |
| 288 | if ('category_base' == $option->option_name) $option->option_value = preg_replace('|/+$|', '', $option->option_value); |
| 289 | @ $value = unserialize($option->option_value); |
| 290 | if ($value === FALSE) |
| 291 | $value = $option->option_value; |
| 292 | $all_options->{$option->option_name} = apply_filters('pre_option_' . $option->option_name, $value); |
| 293 | } |
| 294 | return apply_filters('all_options', $all_options); |
| 295 | } |
| 296 | |
| 297 | function update_option($option_name, $newvalue) { |
| 298 | global $wpdb, $cache_settings; |
| 299 | if ( is_array($newvalue) || is_object($newvalue) ) |
| 300 | $newvalue = serialize($newvalue); |
| 301 | |
| 302 | $newvalue = trim($newvalue); // I can't think of any situation we wouldn't want to trim |
| 303 | |