Get all posts from Wordpress as JSON - php

Question

I am trying ti get all the posts form my Wordpress website with the post_type "product".
I tried the below but it doesn't work.
<?php
$args = array( 'post_type' => 'product', 'post_status' => 'publish');
$loop = new WP_Query( $args );
$array = array();
while ( $loop->have_posts() ) : $loop->the_post();
global $product;
$array[] = array(
'id' => get_the_ID(),
'title' => get_the_title()
);
endwhile;
wp_reset_query();
ob_clean();
echo json_encode($array);
exit();
?>
Although when I add 'posts_per_page' => 450 to $args, it returns posts of the type, however if I add a value higher than 450 such as 500, it returns nothing again.
I am using this to loop through all product posts and add the name, price etc. to an array in the loop.
How do I fix the $args to get all the product posts.
EDIT:
I also recently tried:
<?php
$args="SELECT * FROM wp_posts WHERE wp_posts.`post_type` = 'product' AND wp_posts.`post_status` = 'publish'";
$loop = get_results( $args );
$array = array();
while ( $loop->have_posts() ) : $loop->the_post();
global $product;
$array[] = array(
'id' => get_the_ID(),
'title' => get_the_title()
);
endwhile;
// wp_reset_query();
ob_clean();
echo json_encode($array);
exit();
?>

Answer 1

No need to simulate the loop here. This is the most straightforward way:
$args = array(
'post_type' => 'product',
'post_status' => 'publish',
'nopaging' => true
);
$query = new WP_Query( $args ); // $query is the WP_Query Object
$posts = $query->get_posts(); // $posts contains the post objects
$output = array();
foreach( $posts as $post ) { // Pluck the id and title attributes
$output[] = array( 'id' => $post->ID, 'title' => $post->post_title );
}
echo json_encode( $output );
Or you can leave out the foreach and just echo json_encode( $posts ); to get all the properties of the posts.

Answer 2

please check your table for data. Is there any post of post type products. if yes then the simple query should work
SELECT * FROM $wpdb->posts WHERE $wpdb->posts.`post_type` = 'product' AND $wpdb->posts.`post_status` = 'publish'
you can run this code in phpmyadmin directly. and see if any post is there. and please replace $wpdb with the prefix of you tables.

Answer 3

<?php
//this file is in main folder and it works for me(yourWordpressWebsite.com/yourFile.php)
$path = $_SERVER['DOCUMENT_ROOT'];
include_once $path . '/wp-config.php';
include_once $path . '/wp-load.php';
include_once $path . '/wp-includes/wp-db.php';
include_once $path . '/wp-includes/pluggable.php';
global $wpdb;
$posts = $wpdb->get_results("SELECT ID, post_title FROM $wpdb->posts WHERE post_status = 'publish' AND post_type='post'");
echo json_encode($posts);
exit();
?>
output:
[{"ID":"1","post_title":"Hello world!"},{"ID":"63","post_title":"Blockquote Post"}...

Answer 4

This is how you show all posts in a query: 'posts_per_page' => -1 - so your query becomes:
$args = array( 'post_type' => 'product', 'posts_per_page' => -1 );
$loop = new WP_Query( $args );

Answer 5

As far as i know, you need to get posts with manual query,
Just like this,
global $wpdb;
$args = "SELECT * FROM $wpdb->posts WHERE $wpdb->posts.`post_type` = 'product' AND $wpdb->posts.`post_status` = 'publish' ORDER BY $wpdb->posts.`ID`";
$loop = $wpdb->get_results( $args );
In my experience, 'posts_per_page' => -1 will not returns all the posts, i don't know why.
Somehow wordpress not returning more than 500 or 1000 posts from database...

Answer 6

You might try using a plugin developed for such a purpose. This one is listed on the WordPress.org website, and it seems like it may help you.
JSON API
It's always best to check the WordPress.org hosted plugins first

Answer 7

$args = array( 'posts_per_page' => -1, 'post_type' => 'product' );
$myposts = get_posts( $args );
echo json_encode($myposts);
I think this should work