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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 |
|---|---|
| 2125 | $output = ''; |
| 2126 | } else { |
| 2127 | $title = $post->post_title; |
| 2128 | |
| 2129 | if ( empty( $post->post_title ) ) { |
| 2130 | $title = $previous ? __( 'Previous Post' ) : __( 'Next Post' ); |
| 2131 | } |
| 2132 | |
| 2133 | /** This filter is documented in wp-includes/post-template.php */ |
| 2134 | $title = apply_filters( 'the_title', $title, $post->ID ); |
| 2135 | |
| 2136 | $date = mysql2date( get_option( 'date_format' ), $post->post_date ); |
| 2137 | $rel = $previous ? 'prev' : 'next'; |
| 2138 | |
| 2139 | $string = '<a href="' . get_permalink( $post ) . '" rel="' . $rel . '">'; |
| 2140 | $inlink = str_replace( '%title', $title, $link ); |
| 2141 | $inlink = str_replace( '%date', $date, $inlink ); |
| 2142 | $inlink = $string . $inlink . '</a>'; |
| 2143 | |