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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 |
|---|---|
| 1600 | * @return string|null |
| 1601 | */ |
| 1602 | function get_previous_posts_link( $label = null ) { |
| 1603 | global $paged; |
| 1604 | |
| 1605 | if ( null === $label ) |
| 1606 | $label = __( '« Previous Page' ); |
| 1607 | |
| 1608 | if ( !is_single() && $paged > 1 ) { |
| 1609 | $attr = apply_filters( 'previous_posts_link_attributes', '' ); |
| 1610 | return '<a href="' . previous_posts( false ) . "\" $attr>". preg_replace( '/&([^#])(?![a-z]{1,8};)/i', '&$1', $label ) .'</a>'; |
| 1611 | } |
| 1612 | } |
| 1613 | |
| 1614 | /** |
| 1615 | * Display the previous posts page link. |
| 1616 | * |
| 1617 | * @since 0.71 |
| 1618 | * @uses get_previous_posts_link() |