前言：
介绍如何利用自定义栏目给主题添加文章转载来源。
后台添加自定义栏目选项
if ( !class_exists(‘myCustomFields’<span%20class=”br0″>) ) {
class myCustomFields {
/**
* @var string $prefix 自定义栏目前缀，一个完整的自定义栏目是需要前缀+name的，比如我的前缀是git_,name下面有baidu_submit，那么完整的自定义栏目就是git_baidu_submit.
*/
var $prefix = ”<span%20class=””>;
/**
* @var array $postTypes 这是自定义面板的使用范围，这里一般就是在文章以及页面
*/
var $postTypes = array( “page”, “post”, “product” , “gallery” );
/**
* @var array $customFields 开始组件自定义面板数组
*/
var $customFields = array(
array(
“name” => “f”,
“title” => “转载来源名字”,
“description” => “这里可以输入文章转载名字，不填写的话，不显示转载标签”,
“type” => “text”,
“scope” => array( “post”, “page” ),
“capability” => “edit_posts”
),
array(
“name” => “furl”,
“title” => “转载来源链接”,
“description” => “这里可以输入您的转载来源链接”,
“type” => “text”,
“scope” => array( “post”, “page” ),
“capability” => “edit_posts”
)
);
/**
* PHP 5 Constructor
*/
function __construct() {
add_action( ‘admin_menu’<span%20class=””>, array( $this, ‘createCustomFields’ ) );
add_action( ‘save_post’<span%20class=””>, array( $this, ‘saveCustomFields’ ), 1, 2 );
}
/**
* 创建一组你自己的自定义栏目
*/
function createCustomFields() {
if ( function_exists( ‘add_meta_box’ ) ) {
foreach ( $this–>postTypes as $postType ) {
add_meta_box( ‘my-custom-fields’<span%20class=””>, ‘主题文章发布选项’<span%20class=””>, array( $this, ‘displayCustomFields’ ), $postType, ‘normal’<span%20class=””>, ‘high’ );
}
}
}
/**
* 在文章发布页显示出来面板
*/
function displayCustomFields() {
global $post;
?>
<div class=“form-wrap”>
<?php
wp_nonce_field( ‘my-custom-fields’<span%20class=””>, ‘my-custom-fields_wpnonce’<span%20class=””>, false, true );
foreach ( $this–>customFields as $customField ) {
// Check scope
$scope = $customField[ ‘scope’ ];
$output = false;
foreach ( $scope as $scopeItem ) {
switch ( $scopeItem ) {
default: {
if ( $post–>post_type == $scopeItem )
$output = true;
break;
}
}
if ( $output ) break;
}
// 检查权限
if ( !current_user_can( $customField[‘capability’<span%20class=”br0″>], $post–>ID ) )
$output = false;
// 通过则输出
if ( $output ) { ?>
<div class=“form-field form-required”>
<?php
switch ( $customField[ ‘type’ ] ) {
case “checkbox”: {
// Checkbox 组件
echo ‘<label for=”‘<span%20class=””> . $this–>prefix . $customField[ ‘name’ ] .‘” style=”display:inline;”><b>’<span%20class=””> . $customField[ ‘title’ ] . ‘</b></label> ‘<span%20class=””>;
echo ‘<input type=”checkbox” name=”‘<span%20class=””> . $this–>prefix . $customField[‘name’<span%20class=”br0″>] . ‘” id=”‘<span%20class=””> . $this–>prefix . $customField[‘name’<span%20class=”br0″>] . ‘” value=”1″‘<span%20class=””>;
if ( get_post_meta( $post–>ID, $this–>prefix . $customField[‘name’<span%20class=”br0″>], true ) == “1” )
echo ‘ checked=”checked”‘<span%20class=””>;
echo ‘” style=”width: auto;” />’<span%20class=””>;
break;
}
case “textarea”:
case “wysiwyg”: {
// Text area
echo ‘<label for=”‘<span%20class=””> . $this–>prefix . $customField[ ‘name’ ] .‘”><b>’<span%20class=””> . $customField[ ‘title’ ] . ‘</b></label>’<span%20class=””>;
echo ‘<textarea name=”‘<span%20class=””> . $this–>prefix . $customField[ ‘name’ ] . ‘” id=”‘<span%20class=””> . $this–>prefix . $customField[ ‘name’ ] . ‘” columns=”30″ rows=”5″>’<span%20class=””> . htmlspecialchars( get_post_meta( $post–>ID, $this–>prefix . $customField[ ‘name’ ], true ) ) . ‘</textarea>’<span%20class=””>;
// WYSIWYG
if ( $customField[ ‘type’ ] == “wysiwyg” ) { ?>
<script type=“text/javascript”>
jQuery( document ).ready( function() {
jQuery( “<?php echo $this->prefix . $customField[ ‘name’ ]; ?>” ).addClass( “mceEditor” );
if ( typeof( tinyMCE ) == “object” && typeof( tinyMCE.execCommand ) == “function” ) {
tinyMCE.execCommand( “mceAddControl”, false, “<?php echo $this->prefix . $customField[ ‘name’ ]; ?>” );
}
});
</script>
<?php }
break;
}
default: {
// Plain text field
echo ‘<label for=”‘<span%20class=””> . $this–>prefix . $customField[ ‘name’ ] .‘”><b>’<span%20class=””> . $customField[ ‘title’ ] . ‘</b></label>’<span%20class=””>;
echo ‘<input type=”text” name=”‘<span%20class=””> . $this–>prefix . $customField[ ‘name’ ] . ‘” id=”‘<span%20class=””> . $this–>prefix . $customField[ ‘name’ ] . ‘” value=”‘<span%20class=””> . htmlspecialchars( get_post_meta( $post–>ID, $this–>prefix . $customField[ ‘name’ ], true ) ) . ‘” />’<span%20class=””>;
break;
}
}
?>
<?php if ( $customField[ ‘description’ ] ) echo ‘<p>’<span%20class=””> . $customField[ ‘description’ ] . ‘</p>’<span%20class=””>; ?>
</div>
<?php
}
} ?>
</div>
<?php
}
/**
* 保存自定义栏目数据
*/
function saveCustomFields( $post_id, $post ) {
if ( !isset( $_POST[ ‘my-custom-fields_wpnonce’ ] ) || !wp_verify_nonce( $_POST[ ‘my-custom-fields_wpnonce’ ], ‘my-custom-fields’ ) )
return;
if ( !current_user_can( ‘edit_post’<span%20class=””>, $post_id ) )
return;
if ( ! in_array( $post–>post_type, $this–>postTypes ) )
return;
foreach ( $this–>customFields as $customField ) {
if ( current_user_can( $customField[‘capability’<span%20class=”br0″>], $post_id ) ) {
if ( isset( $_POST[ $this–>prefix . $customField[‘name’<span%20class=”br0″>] ] ) && trim( $_POST[ $this–>prefix . $customField[‘name’<span%20class=”br0″>] ] ) ) {
$value = $_POST[ $this–>prefix . $customField[‘name’<span%20class=”br0″>] ];
// Auto-paragraphs for any WYSIWYG
if ( $customField[‘type’<span%20class=”br0″>] == “wysiwyg” ) $value = wpautop( $value );
update_post_meta( $post_id, $this–>prefix . $customField[ ‘name’ ], $value );
} else {
delete_post_meta( $post_id, $this–>prefix . $customField[ ‘name’ ] );
}
}
}
}
} // End Class
} // End if class exists statement
// Instantiate the class
if ( class_exists(‘myCustomFields’<span%20class=”br0″>) ) {
$myCustomFields_var = new myCustomFields();
前台显示：
子主题目录内新建文件夹
template-parts
，然后复制主题内
/template-parts/cotent.php
文件到此目录下，然后编辑134行
<div class=“longwb t-r fl”>
<button @click=“showLongWeiBo”><span><i class=“iconfont zrz-icon-font-tupian”></i>海报</span></button>
</div>
在<button @click=”showLongWeiBo”>后添加代码：
<?php
$f = get_post_meta($post–>ID, ‘f’<span%20class=””>, true);
if ( $f ) echo ‘<a rel=”nofollow” target=”_blank” href=”‘<span%20class=””> . get_post_meta($post–>ID, ‘furl’<span%20class=””>, true) . ‘”><button><i class=”iconfont zrz-icon-font-beizhuyitianxie”></i> 来源：’<span%20class=””> .get_post_meta($post–>ID, ‘f’<span%20class=””>, true) . ‘</button></a>’<span%20class=””>;
?>
大功告成。
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