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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 |
|---|---|
| 3538 | /** |
| 3539 | * Fires when the given function is being used incorrectly. |
| 3540 | * |
| 3541 | * @since 3.1.0 |
| 3542 | * |
| 3543 | * @param string $function The function that was called. |
| 3544 | * @param string $message A message explaining what has been done incorrectly. |
| 3545 | * @param string $version The version of WordPress where the message was added. |
| 3546 | */ |
| 3547 | do_action( 'doing_it_wrong_run', $function, $message, $version ); |
| 3548 | |
| 3549 | /** |
| 3550 | * Filter whether to trigger an error for _doing_it_wrong() calls. |
| 3551 | * |
| 3552 | * @since 3.1.0 |
| 3553 | * |
| 3554 | * @param bool $trigger Whether to trigger the error for _doing_it_wrong() calls. Default true. |
| 3555 | */ |
| 3556 | if ( WP_DEBUG && apply_filters( 'doing_it_wrong_trigger_error', true ) ) { |