重新排列注释字段

注释文本区域已moved 到WordPress 4.4的顶部：

如果我们更喜欢旧的设置，它在底部呢？

重新安排author, url 和email 注释字段

我们可以修改作者、url和电子邮件字段的显示顺序，包括：

/**
 * Re-arranging the author, url and email comment fields
 */
add_filter( \'comment_form_defaults\', function( $defaults )
{
    $_defaults = [];

    // Re-arrange the fields to your needs:
    $fields = [ \'author\', \'url\', \'email\' ];

    foreach( $fields as $field )
        $_defaults[\'fields\'][$field] = $defaults[\'fields\'][$field]; 

    return $_defaults;
} );

但我们必须找到另一种方法来重新排序评论文本区域和提交按钮。

自定义解决方法要重新排列所有五个注释字段，我们可以使用自定义wpse_comment_fields 过滤器：

add_filter( \'wpse_comment_fields\', function( $fields )
{       
    return $fields;
} );

在functions.php 文件或插件中。

示例：Author 顶部字段

让我们将作者字段移到顶部：

/**
 * Display the \'author\' comment field at top:
 */
add_filter( \'wpse_comment_fields\', function( $fields )
{
    // Re-arrange fields
    $fields = [ \'author\', \'comment\', \'url\', \'email\', \'submit\' ];

    return $fields;
} );

然后，注释表单将显示为：

示例：Comment 字段并移除Url 字段

此处，我们在底部显示注释字段，并删除url字段：

/**
 * Display the \'comment\' field at the bottom and remove the \'url\' field:
 */
add_filter( \'wpse_comment_fields\', function( $fields )
{
    // Re-arrange fields
    $fields = [ \'email\', \'author\', \'comment\', \'submit\' ];

    return $fields;
} );

然后，评论表单将显示：

演示插件wpse_comment_fields 过滤器（PHP 5.4以上）：

<?php
/**
 * Plugin Name: Rearrange Comment Fields
 * Plugin URI:  http://wordpress.stackexchange.com/a/207449/26350
 * Author:      Birgir Erlendsson (birgire)
 * Description: Support for rearranging the comment fields: \'comment\', \'auhtor\', \'url\', \'email\' and \'submit\' through the \'wpse_comment_fields\' filter.
 * Version:     0.0.1
 */

add_action( \'comment_form_before\', function()
{
    if( class_exists( \'WPSE_Rearrange_Comment_Fields\' ) )
    {
        $fields = apply_filters( 
            \'wpse_comment_fields\', 
            [ \'comment\', \'author\', \'url\', \'email\', \'submit\' ]
        );

        $o = new WPSE_Rearrange_Comment_fields;
        $o->set_fields( $fields )
          ->init();
    }
});

class WPSE_Rearrange_Comment_Fields
{
    private $html       = [];
    private $defaults   = [];
    private $fields     = [];

    public function set_fields( array $fields )
    {
        $this->fields = $fields;
        return $this;
    }

    public function init()
    {
        // Default
        $this->defaults = [ \'comment\', \'author\', \'url\', \'email\', \'submit\' ];

        // Check for defaults
        if( empty( $this->fields ) )
            $this->fields = $this->defaults;

        // Hooks
        add_action( \'comment_form\',                 [$this, \'display\'],                     PHP_INT_MAX );
        add_filter( \'comment_form_field_comment\',   [$this, \'comment_form_field_comment\'],  PHP_INT_MAX );
        add_filter( \'comment_form_submit_field\',    [$this, \'comment_form_submit_field\'],   PHP_INT_MAX );
        foreach( [ \'author\', \'url\', \'email\' ] as $field )
            add_filter( "comment_form_field_{$field}",  [$this, \'comment_form_field\'], PHP_INT_MAX );       
    }

    public function display()
    {
        // Display fields in the custom order                   
        $html = \'\';
        foreach( (array) $this->fields as $field )
        {
            if( in_array( $field, $this->defaults ) ) 
                $html .= $this->html[$field]; 
        }
        echo $html;
    }

    public function comment_form_submit_field( $submit_field )
    {
        $this->html[\'submit\'] = $submit_field;
        return \'\';
    }

    public function comment_form_field_comment( $comment_field )
    {
        $this->html[\'comment\'] = $comment_field;
        return \'\';
    }

    public function comment_form_field( $field )
    {
        $key = str_replace( \'comment_form_field_\', \'\', current_filter() );
        $this->html[$key] = $field;
        return \'\';
    }

} // end class