Gallery – Illegal string offsets

• qiD

• May 21, 2018 at 10:53 pm

I am trying to create a gallery.

1. I register fields via PHP

acf_add_local_field_group(array(
		'key' => 'group_post_gallery',
		'title' => esc_html__( 'Gallery', 'lilio' ),
		'fields' => array(
			array(
				'key' => 'field_post_gallery',
				'label' => esc_html__( 'Images', 'lilio' ),
				'name' => 'my_post_gallery',
				'type' => 'gallery',
				'instructions' => '',
				'required' => 0,
				'conditional_logic' => 0,
				'wrapper' => array(
					'width' => '',
					'class' => '',
					'id' => '',
				),
				'min' => '',
				'max' => '',
				'insert' => 'append',
				'library' => 'all',
				'min_width' => '',
				'min_height' => '',
				'min_size' => '',
				'max_width' => '',
				'max_height' => '',
				'max_size' => '',
				'mime_types' => '',
			),
		),
		'location' => array(
			array(
				array(
					'param' => 'post_type',
					'operator' => '==',
					'value' => 'post',
				),
				array(
					'param' => 'post_format',
					'operator' => '==',
					'value' => 'gallery',
				),
			),
		),
		'menu_order' => 0,
		'position' => 'acf_after_title',
		'style' => 'default',
		'label_placement' => 'top',
		'instruction_placement' => 'label',
		'hide_on_screen' => '',
		'active' => 1,
		'description' => '',
	));

2. Added code from https://www.advancedcustomfields.com/resources/gallery/ > Basic list of images

<?php 

$images = get_field('gallery');
$size = 'full'; // (thumbnail, medium, large, full or custom size)

if( $images ): ?>
    <ul>
        <?php foreach( $images as $image ): ?>
            <li>
            	<?php echo wp_get_attachment_image( $image['ID'], $size ); ?>
            </li>
        <?php endforeach; ?>
    </ul>
<?php endif; ?>

Errors:
Warning: Illegal string offset ‘ID’ in …

What is wrong ?

• qiD

• May 22, 2018 at 6:10 am

OK, I found solution.
I used is_admin() function and this cause a problem.

// Before
if ( is_admin() ) {
	require_once get_template_directory() . '/core/custom-fields.php';
}

// After
require_once get_template_directory() . '/core/custom-fields.php';