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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 |
|---|---|
| 2109 | |
| 2110 | if ( !is_single() && $paged > 1 ) { |
| 2111 | /** |
| 2112 | * Filter the anchor tag attributes for the previous posts page link. |
| 2113 | * |
| 2114 | * @since 2.7.0 |
| 2115 | * |
| 2116 | * @param string $attributes Attributes for the anchor tag. |
| 2117 | */ |
| 2118 | $attr = apply_filters( 'previous_posts_link_attributes', '' ); |
| 2119 | return '<a href="' . previous_posts( false ) . "\" $attr>". preg_replace( '/&([^#])(?![a-z]{1,8};)/i', '&$1', $label ) .'</a>'; |
| 2120 | } |
| 2121 | } |
| 2122 | |
| 2123 | /** |
| 2124 | * Display the previous posts page link. |
| 2125 | * |
| 2126 | * @since 0.71 |
| 2127 | * @uses get_previous_posts_link() |