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To save our bandwidth, we show only a snippet of code around each occurence of the hook. View complete file in SVN (without highlighting).
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 |
|---|---|
| 1800 | |
| 1801 | if ( $is_wp_error ) { |
| 1802 | /** |
| 1803 | * Fires when `is_wp_error()` is called and its parameter is an instance of `WP_Error`. |
| 1804 | * |
| 1805 | * @since 5.6.0 |
| 1806 | * |
| 1807 | * @param WP_Error $thing The error object passed to `is_wp_error()`. |
| 1808 | */ |
| 1809 | do_action( 'is_wp_error_instance', $thing ); |
| 1810 | } |
| 1811 | |
| 1812 | return $is_wp_error; |
| 1813 | } |
| 1814 | |
| 1815 | /** |
| 1816 | * Determines whether file modifications are allowed. |
| 1817 | * |
| 1818 | * @since 4.8.0 |