将代码快速放入我的测试设置中，我想您是在问为什么页面元盒会显示所需的post元输入。

您的add_meta_box() 功能。问题在于您的变量$custom_meta_fields. 当WordPress到达文件末尾时$custom_meta_fields 由用于发布的数组定义。因此，您的页面元数据库正在使用帖子的版本$custom_meta_fields. 这是您使用全局变量的方式的副作用。。。。它们很容易被覆盖。最简单的方法是使用不同的变量：

// Add the Meta Box
function vs_add_custom_meta_box() {
    add_meta_box(
        \'custom_meta_box\', // $id
        \'Custom Meta Box\', // $title
        \'vs_show_custom_meta_box\', // $callback
        \'page\', // $page
        \'normal\', // $context
        \'high\'); // $priority
}
add_action(\'add_meta_boxes\', \'vs_add_custom_meta_box\');

// Field Array
$prefix = \'custom_\';
$custom_page_meta_fields = array(
    array(
        \'label\'=> \'Background Color\',
        \'desc\'  => \'Select the color you want to appear as the page background.\',
        \'id\'    => $prefix.\'select\',
        \'type\'  => \'select\',
        \'options\' => array (
            \'one\' => array (
                \'label\' => \'Orange\',
                \'value\' => \'blog\'
            ),
            \'two\' => array (
                \'label\' => \'Light red\',
                \'value\' => \'services\'
            ),
            \'three\' => array (
                \'label\' => \'Dark red\',
                \'value\' => \'works\'
            ),
            \'four\' => array (
                \'label\' => \'Green\',
                \'value\' => \'portfolio\'
            ),
            \'five\' => array (
                \'label\' => \'Light blue\',
                \'value\' => \'about\'
            ),
            \'six\' => array (
                \'label\' => \'Dark blue\',
                \'value\' => \'contact\'
            )
        )
    ),
    array(
        \'label\'=> \'Main page display\',
        \'desc\'  => \'Tick if this page will be displayed on the homepage. || Notice: Make sure there are no 2 pages with the same color displayed on the homepage.\',
        \'id\'    => $prefix.\'main\',
        \'type\'  => \'checkbox\'
    )
);

// The Callback
function vs_show_custom_meta_box() {  
global $custom_page_meta_fields, $post;
// Use nonce for verification
echo \'<input type="hidden" name="custom_meta_box_nonce" value="\'.wp_create_nonce(basename(__FILE__)).\'" />\';

    // Begin the field table and loop
    echo \'<table class="form-table">\';
    foreach ($custom_page_meta_fields as $field) {
        // get value of this field if it exists for this post
        $meta = get_post_meta($post->ID, $field[\'id\'], true);
        // begin a table row with
        echo \'<tr>
                <th><label for="\'.$field[\'id\'].\'">\'.$field[\'label\'].\'</label></th>
                <td>\';
                switch($field[\'type\']) {
                    // case items will go here
                    // text
case \'text\':
    echo \'<input type="text" name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'" value="\'.$meta.\'" size="30" />
        <br /><span class="description">\'.$field[\'desc\'].\'</span>\';
break;
// textarea
case \'textarea\':
    echo \'<textarea name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'" cols="60" rows="4">\'.$meta.\'</textarea>
        <br /><span class="description">\'.$field[\'desc\'].\'</span>\';
break;
// checkbox
case \'checkbox\':
    echo \'<input type="checkbox" name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'" \',$meta ? \' checked="checked"\' : \'\',\'/>
        <label for="\'.$field[\'id\'].\'">\'.$field[\'desc\'].\'</label>\';
break;
// select
case \'select\':
    echo \'<select name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'">\';
    foreach ($field[\'options\'] as $option) {
        echo \'<option\', $meta == $option[\'value\'] ? \' selected="selected"\' : \'\', \' value="\'.$option[\'value\'].\'">\'.$option[\'label\'].\'</option>\';
    }
    echo \'</select><br /><span class="description">\'.$field[\'desc\'].\'</span>\';
break;
                } //end switch
        echo \'</td></tr>\';
    } // end foreach
    echo \'</table>\'; // end table
}

// Save the Data
function vs_save_custom_meta($post_id) {
    global $custom_page_meta_fields;

    // verify nonce
    if (!wp_verify_nonce($_POST[\'custom_meta_box_nonce\'], basename(__FILE__)))
        return $post_id;
    // check autosave
    if (defined(\'DOING_AUTOSAVE\') && DOING_AUTOSAVE)
        return $post_id;
    // check permissions
    if (\'page\' == $_POST[\'post_type\']) {
        if (!current_user_can(\'edit_page\', $post_id))
            return $post_id;
        } elseif (!current_user_can(\'edit_post\', $post_id)) {
            return $post_id;
    }

    // loop through fields and save the data
    foreach ($custom_page_meta_fields as $field) {
        $old = get_post_meta($post_id, $field[\'id\'], true);
        $new = $_POST[$field[\'id\']];
        if ($new && $new != $old) {
            update_post_meta($post_id, $field[\'id\'], $new);
        } elseif (\'\' == $new && $old) {
            delete_post_meta($post_id, $field[\'id\'], $old);
        }
    } // end foreach
}
add_action(\'save_post\', \'vs_save_custom_meta\');



// Add the Meta Box
function vs_add_excerpt_meta_box() {
    add_meta_box(
        \'excerpt_meta_box\', // $id
        \'Excerpt Meta Box\', // $title
        \'vs_show_excerpt_meta_box\', // $callback
        \'post\', // $page
        \'normal\', // $context
        \'high\'); // $priority
}
add_action(\'add_meta_boxes\', \'vs_add_excerpt_meta_box\');

// Field Array
$prefix = \'custom_\';
$custom_post_meta_fields = array(
    array(
        \'label\' => \'Custom post teaser\',
        \'desc\'  => \'Replace the default excerpt the text of your choice\',
        \'id\'    => $prefix.\'excerpt\',
        \'type\'  => \'textarea\'
        )
);

// The Callback
function vs_show_excerpt_meta_box() { 
global $custom_post_meta_fields, $post;
// Use nonce for verification
echo \'<input type="hidden" name="excerpt_meta_box_nonce" value="\'.wp_create_nonce(basename(__FILE__)).\'" />\';

    // Begin the field table and loop
    echo \'<table class="form-table">\';
    foreach ($custom_post_meta_fields as $field) {
        // get value of this field if it exists for this post
        $meta = get_post_meta($post->ID, $field[\'id\'], true);
        // begin a table row with
        echo \'<tr>
                <th><label for="\'.$field[\'id\'].\'">\'.$field[\'label\'].\'</label></th>
                <td>\';
                switch($field[\'type\']) {
                    // case items will go here
                    // text
case \'text\':
    echo \'<input type="text" name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'" value="\'.$meta.\'" size="30" />
        <br /><span class="description">\'.$field[\'desc\'].\'</span>\';
break;
// textarea
case \'textarea\':
    echo \'<textarea name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'" cols="60" rows="4">\'.$meta.\'</textarea>
        <br /><span class="description">\'.$field[\'desc\'].\'</span>\';
break;
// checkbox
case \'checkbox\':
    echo \'<input type="checkbox" name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'" \',$meta ? \' checked="checked"\' : \'\',\'/>
        <label for="\'.$field[\'id\'].\'">\'.$field[\'desc\'].\'</label>\';
break;
// select
case \'select\':
    echo \'<select name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'">\';
    foreach ($field[\'options\'] as $option) {
        echo \'<option\', $meta == $option[\'value\'] ? \' selected="selected"\' : \'\', \' value="\'.$option[\'value\'].\'">\'.$option[\'label\'].\'</option>\';
    }
    echo \'</select><br /><span class="description">\'.$field[\'desc\'].\'</span>\';
break;
                } //end switch
        echo \'</td></tr>\';
    } // end foreach
    echo \'</table>\'; // end table
}

// Save the Data
function vs_save_excerpt_meta($post_id) {
    global $custom_post_meta_fields;

    // verify nonce
    if (!wp_verify_nonce($_POST[\'excerpt_meta_box_nonce\'], basename(__FILE__)))
        return $post_id;
    // check autosave
    if (defined(\'DOING_AUTOSAVE\') && DOING_AUTOSAVE)
        return $post_id;
    // check permissions
    if (\'page\' == $_POST[\'post_type\']) {
        if (!current_user_can(\'edit_page\', $post_id))
            return $post_id;
        } elseif (!current_user_can(\'edit_post\', $post_id)) {
            return $post_id;
    }

    // loop through fields and save the data
    foreach ($custom_post_meta_fields as $field) {
        $old = get_post_meta($post_id, $field[\'id\'], true);
        $new = $_POST[$field[\'id\']];
        if ($new && $new != $old) {
            update_post_meta($post_id, $field[\'id\'], $new);
        } elseif (\'\' == $new && $old) {
            delete_post_meta($post_id, $field[\'id\'], $old);
        }
    } // end foreach
}
add_action(\'save_post\', \'vs_save_custom_meta\');

// Add the Meta Box
function vs_add_excerpt_meta_box() {
    add_meta_box(
        \'excerpt_meta_box\', // $id
        \'Excerpt Meta Box\', // $title
        \'vs_show_excerpt_meta_box\', // $callback
        \'post\', // $page
        \'normal\', // $context
        \'high\'); // $priority
}
add_action(\'add_meta_boxes\', \'vs_add_excerpt_meta_box\');

function vs_get_post_meta_fields(){
// Field Array
$prefix = \'custom_\';
return array(
    array(
        \'label\' => \'Custom post teaser\',
        \'desc\'  => \'Replace the default excerpt the text of your choice\',
        \'id\'    => $prefix.\'excerpt\',
        \'type\'  => \'textarea\'
        )
);
}

// The Callback
function vs_show_excerpt_meta_box() { 
global $post;
// Use nonce for verification
echo \'<input type="hidden" name="excerpt_meta_box_nonce" value="\'.wp_create_nonce(basename(__FILE__)).\'" />\';

    // get the array with proper scope
    $custom_post_meta_fields = vs_get_post_meta_fields();

    // Begin the field table and loop
    echo \'<table class="form-table">\';
    foreach ($custom_post_meta_fields as $field) {
        // get value of this field if it exists for this post
        $meta = get_post_meta($post->ID, $field[\'id\'], true);
        // begin a table row with
        echo \'<tr>
                <th><label for="\'.$field[\'id\'].\'">\'.$field[\'label\'].\'</label></th>
                <td>\';
                switch($field[\'type\']) {
                    // case items will go here
                    // text
case \'text\':
    echo \'<input type="text" name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'" value="\'.$meta.\'" size="30" />
        <br /><span class="description">\'.$field[\'desc\'].\'</span>\';
break;
// textarea
case \'textarea\':
    echo \'<textarea name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'" cols="60" rows="4">\'.$meta.\'</textarea>
        <br /><span class="description">\'.$field[\'desc\'].\'</span>\';
break;
// checkbox
case \'checkbox\':
    echo \'<input type="checkbox" name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'" \',$meta ? \' checked="checked"\' : \'\',\'/>
        <label for="\'.$field[\'id\'].\'">\'.$field[\'desc\'].\'</label>\';
break;
// select
case \'select\':
    echo \'<select name="\'.$field[\'id\'].\'" id="\'.$field[\'id\'].\'">\';
    foreach ($field[\'options\'] as $option) {
        echo \'<option\', $meta == $option[\'value\'] ? \' selected="selected"\' : \'\', \' value="\'.$option[\'value\'].\'">\'.$option[\'label\'].\'</option>\';
    }
    echo \'</select><br /><span class="description">\'.$field[\'desc\'].\'</span>\';
break;
                } //end switch
        echo \'</td></tr>\';
    } // end foreach
    echo \'</table>\'; // end table
}

// Save the Data
function vs_save_excerpt_meta($post_id) {

    $custom_post_meta_fields = vs_get_post_meta_fields();


    // verify nonce
    if (!wp_verify_nonce($_POST[\'excerpt_meta_box_nonce\'], basename(__FILE__)))
        return $post_id;
    // check autosave
    if (defined(\'DOING_AUTOSAVE\') && DOING_AUTOSAVE)
        return $post_id;
    // check permissions
    if (\'page\' == $_POST[\'post_type\']) {
        if (!current_user_can(\'edit_page\', $post_id))
            return $post_id;
        } elseif (!current_user_can(\'edit_post\', $post_id)) {
            return $post_id;
    }

    // loop through fields and save the data
    foreach ($custom_post_meta_fields as $field) {
        $old = get_post_meta($post_id, $field[\'id\'], true);
        $new = $_POST[$field[\'id\']];
        if ($new && $new != $old) {
            update_post_meta($post_id, $field[\'id\'], $new);
        } elseif (\'\' == $new && $old) {
            delete_post_meta($post_id, $field[\'id\'], $old);
        }
    } // end foreach
}
add_action(\'save_post\', \'vs_save_custom_meta\');