Answers for "wordpress post meta"

add post meta wordpress

<?php

$post_id = 1;
$meta_key = '_test';
$meta_value = 'this is a test';
$unique = true;

add_post_meta( $post_id, $meta_key, $meta_value, $unique );

wp get meta field value

<?php $key_1_value = get_post_meta( get_the_ID(), 'key_1', true ); ?>

wp get meta field value

<?php if ( get_post_meta( get_the_ID(), 'thumb', true ) ) : ?>
    <a href="<?php the_permalink() ?>" rel="bookmark">
        <img class="thumb" src="<?php echo esc_url( get_post_meta( get_the_ID(), 'thumb', true ) ); ?>" alt="<?php the_title_attribute(); ?>" />
    </a>
<?php endif; ?>