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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 |
|---|---|
| 242 | } |
| 243 | |
| 244 | // If home is not set use siteurl. |
| 245 | if ( 'home' == $setting && '' == $value ) |
| 246 | return get_option('siteurl'); |
| 247 | |
| 248 | if ( 'siteurl' == $setting || 'home' == $setting || 'category_base' == $setting ) |
| 249 | $value = preg_replace('|/+$|', '', $value); |
| 250 | |
| 251 | return apply_filters( 'option_' . $setting, maybe_unserialize($value) ); |
| 252 | } |
| 253 | |
| 254 | function wp_protect_special_option($option) { |
| 255 | $protected = array('alloptions', 'notoptions'); |
| 256 | if ( in_array($option, $protected) ) |
| 257 | die(sprintf(__('%s is a protected WP option and may not be modified'), wp_specialchars($option))); |
| 258 | } |
| 259 | |
| 260 | function form_option($option) { |