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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 |
---|---|
3578 |
|
3579 | if ( -1 == $this->current_post ) { // Loop has just started. |
3580 | /** |
3581 | * Fires once the loop is started. |
3582 | * |
3583 | * @since 2.0.0 |
3584 | * |
3585 | * @param WP_Query $query The WP_Query instance (passed by reference). |
3586 | */ |
3587 | do_action_ref_array( 'loop_start', array( &$this ) ); |
3588 | } |
3589 |
|
3590 | $post = $this->next_post(); |
3591 | $this->setup_postdata( $post ); |
3592 | } |
3593 |
|
3594 | /** |
3595 | * Determines whether there are more posts available in the loop. |
3596 | * |