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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 |
|---|---|
| 104 | |
| 105 | $title = isset( $post->post_title ) ? $post->post_title : ''; |
| 106 | $id = isset( $post->ID ) ? $post->ID : 0; |
| 107 | |
| 108 | if ( ! is_admin() ) { |
| 109 | if ( ! empty( $post->post_password ) ) { |
| 110 | $protected_title_format = apply_filters( 'protected_title_format', __( 'Protected: %s' ) ); |
| 111 | $title = sprintf( $protected_title_format, $title ); |
| 112 | } else if ( isset( $post->post_status ) && 'private' == $post->post_status ) { |
| 113 | $private_title_format = apply_filters( 'private_title_format', __( 'Private: %s' ) ); |
| 114 | $title = sprintf( $private_title_format, $title ); |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | return apply_filters( 'the_title', $title, $id ); |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * Display the Post Global Unique Identifier (guid). |