custom pagination problem

php comparison operators
https://php.net/manual/en/language.operators.comparison.php

php logic operators
https://php.net/manual/en/language.operators.logical.php

Oke,

So it must be :

function pagination_april( $query ) {
 if ( $query->monthnum==04&&year==2005 ) {
 $query = new WP_Query( 'posts_per_page=1' );
 }
 }

add_action( 'pre_get_posts', 'pagination_april' );

Hello,

I tried it but still no luck.
Still all the articles are displayed.

Anyone a idea ?

Roelof

try to treat year and month seperately in the if statement:

function pagination_april( $query ) {
 if ( $query->monthnum==04 && $query->year==2005 ) {
 $query = new WP_Query( 'posts_per_page=1' );
 }
 }

add_action( 'pre_get_posts', 'pagination_april' );

Hello,

So i tried this :

function pagination_april( $query ) {
 if ( $query->year==2005) {
    if ( $query->monthnum==04) {
 $query = new WP_Query( 'posts_per_page=1' );
 }
 }
}

add_action( 'pre_get_posts', 'pagination_april'

But now I get a 500 error on my site.

Roelof

Hello,

The 500 error is solved.
But still the pagination is not working.

But I did some research and found out this.

The variable month and year are still 0.
But there is a variable m which contains 200504.

So I changed it to this :

function pagination_april( $query ) {
 if ( $query->m==200504) {
       $query = new WP_Query( 'posts_per_page=1' );
 }
 }

add_action( 'pre_get_posts', 'pagination_april'

But then again a 500 error.
It seems that WordPress cannot do what I need.

Roelof

You shouldn’t need to set $query to a new WP_Query, but rather just do $query->set( 'posts_per_page', 1 );.

Thank you
But I still get 500 error.

Roelof

What did you do before that got rid of the 500 error?

This may not be the cause of the problem, but you might try:

function pagination_april( $query ) {
    // in 3.3, use is_main_query() instead
    global $wp_the_query;
    if ( $query->m == 200504 && $query === $wp_the_query ) {
        $query->set( 'posts_per_page', 1 );
    }
 }

add_action( 'pre_get_posts', 'pagination_april' );

I changed the /> to ?>

Still a 500 error. It looks like WordPress does not like the use of the variable m .If I change it to month no 500 error but then the script does not work as expected.

Roelof

Oke,

I found out if I change the permalinks to this : https://test.tamarawobben.nl/2005/04/

year and month have the good values of 2005 and 04.
But still this is not workimg.

function pagination_april( $query ) {

if ( $query->year==2005) {
    if ( $query->monthnum==04) {
              $query->set( 'posts_per_page', 1 );
}
 }
}

add_action( 'pre_get_posts', 'pagination_april');

Roelof