我第一次制作一个主题来销售主题。我在开发过程中使用 ACF 作为标准插件，以确保一切正常。
我几乎完成了，所以决定将我的ACF导出到PHP并将其包含在我的functions.php文件中。
我将它给我的代码复制/粘贴到functions.php中，并将ACF、options-page和repeater-field包含在我主题中的一个文件夹中，并相应地引用它们。
但是，当我访问我的网站时，我收到此错误：
Fatal error: Cannot redeclare class Acf in /Applications/MAMP/htdocs/omg/wp-content/themes/omg-v1/external/acf/acf.php on line 46
我也从插件文件夹中删除了实际的插件文件。
任何想法为什么它可能会被窃听？
我知道这是很多代码，但万一有人想看这是我functions.php中的代码（ACF 给我的）
include_once('external/acf/acf.php' );
define( 'ACF_LITE' , true );
// Add-ons
include_once('external/acf-repeater/acf-repeater.php');
include_once('external/acf-options-page/acf-options-page.php');
if(function_exists("register_field_group"))
{
register_field_group(array (
'id' => 'acf_featured-story',
'title' => 'Featured Story',
'fields' => array (
array (
'key' => 'field_5256bd0fc7592',
'label' => 'Is this story featured?',
'name' => 'featured-story',
'type' => 'true_false',
'message' => 'Yes',
'default_value' => 0,
),
),
'location' => array (
array (
array (
'param' => 'post_type',
'operator' => '==',
'value' => 'post',
'order_no' => 0,
'group_no' => 0,
),
),
),
'options' => array (
'position' => 'side',
'layout' => 'default',
'hide_on_screen' => array (
),
),
'menu_order' => 0,
));
register_field_group(array (
'id' => 'acf_options',
'title' => 'Options',
'fields' => array (
array (
'key' => 'field_525d1b6d49043',
'label' => 'Homepage Layout (Left Column)',
'name' => 'homepage-layout-left',
'type' => 'repeater',
'instructions' => 'Select which categories you want to display on the homepage.',
'sub_fields' => array (
array (
'key' => 'field_525d1b8a49044',
'label' => 'Category',
'name' => 'category',
'type' => 'taxonomy',
'column_width' => '',
'taxonomy' => 'category',
'field_type' => 'select',
'allow_null' => 0,
'load_save_terms' => 0,
'return_format' => 'id',
'multiple' => 0,
),
array (
'key' => 'field_525d2473de72c',
'label' => 'Number of Posts',
'name' => 'number-of-posts',
'type' => 'number',
'column_width' => '',
'default_value' => 4,
'placeholder' => '',
'prepend' => '',
'append' => '',
'min' => 2,
'max' => '',
'step' => 2,
),
),
'row_min' => 1,
'row_limit' => 4,
'layout' => 'row',
'button_label' => 'Add a category',
),
array (
'key' => 'field_525d25ee91b41',
'label' => 'Homepage Layout (Sidebar)',
'name' => 'homepage-layout-sidebar',
'type' => 'repeater',
'instructions' => 'Select which categories you want to display in the sidebar.',
'sub_fields' => array (
array (
'key' => 'field_525d25ee91b42',
'label' => 'Category',
'name' => 'category',
'type' => 'taxonomy',
'column_width' => '',
'taxonomy' => 'category',
'field_type' => 'select',
'allow_null' => 0,
'load_save_terms' => 0,
'return_format' => 'id',
'multiple' => 0,
),
array (
'key' => 'field_525d25ee91b43',
'label' => 'Number of Posts',
'name' => 'number-of-posts',
'type' => 'number',
'column_width' => '',
'default_value' => 4,
'placeholder' => '',
'prepend' => '',
'append' => '',
'min' => 2,
'max' => '',
'step' => 2,
),
),
'row_min' => 1,
'row_limit' => 4,
'layout' => 'row',
'button_label' => 'Add a category',
),
array (
'key' => 'field_525d2afdf101b',
'label' => 'Newsletter (optional)',
'name' => 'newsletter',
'type' => 'repeater',
'sub_fields' => array (
array (
'key' => 'field_525d2b6612426',
'label' => 'Link',
'name' => 'link',
'type' => 'text',
'instructions' => 'If you have a newsletter, copy/paste your link in here.',
'column_width' => '',
'default_value' => '',
'placeholder' => '',
'prepend' => '',
'append' => '',
'formatting' => 'none',
'maxlength' => '',
),
array (
'key' => 'field_525d2bb40e332',
'label' => 'Text',
'name' => 'text',
'type' => 'textarea',
'instructions' => 'Enter your call to action for the newsletter here.',
'column_width' => '',
'default_value' => 'Subscribe!
To the OMG! newsletter!',
'placeholder' => '',
'maxlength' => 100,
'formatting' => 'br',
),
),
'row_min' => 0,
'row_limit' => 1,
'layout' => 'row',
'button_label' => 'Add Newsletter Link',
),
array (
'key' => 'field_525e8b77edf6e',
'label' => 'Advert',
'name' => 'adverts',
'type' => 'repeater',
'instructions' => 'Do you wish to display an advert in your sidebar?',
'sub_fields' => array (
array (
'key' => 'field_525e8c1e3600f',
'label' => 'Advert Image',
'name' => 'advert-img',
'type' => 'image',
'instructions' => 'Upload a 300 x 200px image for best quality / load time',
'column_width' => '',
'save_format' => 'url',
'preview_size' => 'full',
'library' => 'all',
),
array (
'key' => 'field_525e8d1699619',
'label' => 'Link',
'name' => 'ad-link',
'type' => 'text',
'column_width' => '',
'default_value' => '',
'placeholder' => '',
'prepend' => '',
'append' => '',
'formatting' => 'none',
'maxlength' => '',
),
),
'row_min' => 0,
'row_limit' => 1,
'layout' => 'table',
'button_label' => 'Add an Advert',
),
),
'location' => array (
array (
array (
'param' => 'options_page',
'operator' => '==',
'value' => 'acf-options',
'order_no' => 0,
'group_no' => 0,
),
),
),
'options' => array (
'position' => 'normal',
'layout' => 'no_box',
'hide_on_screen' => array (
),
),
'menu_order' => 0,
));
}
您需要确保您的包含不会与 ACF 本身或也使用它的其他人的插件发生冲突。
if( !class_exists('Acf') )
include_once('external/acf/acf.php' );
if( !class_exists('acf_repeater_plugin') )
include_once('external/acf-repeater/acf-repeater.php');
if( !class_exists('acf_options_page_plugin') )
include_once('external/acf-options-page/acf-options-page.php');
在函数中包含 ACF 只有四个步骤.php
/***********************************************************
* Integrate ACF in theme
***********************************************************/
// 1. customize ACF path
add_filter('acf/settings/path', 'my_acf_settings_path');
function my_acf_settings_path( $path ) {
// update path
$path = get_stylesheet_directory() . '/framework/acf/';
// return
return $path;
}
// 2. customize ACF dir
add_filter('acf/settings/dir', 'my_acf_settings_dir');
function my_acf_settings_dir( $dir ) {
// update path
$dir = get_stylesheet_directory_uri() . '/framework/acf/';
// return
return $dir;
}
// 3. Hide ACF field group menu item
add_filter('acf/settings/show_admin', '__return_false');
// 4. Include ACF
include_once( get_stylesheet_directory() . '/framework/acf/acf.php' );
// including acf fields
require_once( get_template_directory() . '/framework/acf-fields.php' );