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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 |
|---|---|
| 313 | wp_cache_set('alloptions', $alloptions, 'options'); |
| 314 | } else { |
| 315 | wp_cache_set($option_name, $newvalue, 'options'); |
| 316 | } |
| 317 | |
| 318 | $newvalue = $wpdb->escape($newvalue); |
| 319 | $option_name = $wpdb->escape($option_name); |
| 320 | $wpdb->query("UPDATE $wpdb->options SET option_value = '$newvalue' WHERE option_name = '$option_name'"); |
| 321 | if ( $wpdb->rows_affected == 1 ) { |
| 322 | do_action("update_option_{$option_name}", $oldvalue, $_newvalue); |
| 323 | return true; |
| 324 | } |
| 325 | return false; |
| 326 | } |
| 327 | |
| 328 | // thx Alex Stapleton, http://alex.vort-x.net/blog/ |
| 329 | // expects $name to NOT be SQL-escaped |
| 330 | function add_option($name, $value = '', $deprecated = '', $autoload = 'yes') { |
| 331 | global $wpdb; |