我刚刚开始学习Wordpress，所以请在这里对我放松点。我已经成功地用一些文本字段设置了一个自定义元数据库。如果在这些输入框中输入一些示例文本，则代码在自定义字段中的格式会有所不同。

这是我用来实现自定义字段的代码：

/**
 * function to return a custom field value.
 */
function alep_get_custom_field( $value ) {
    global $post;

    $custom_field = get_post_meta( $post->ID, $value, true );
    if ( !empty( $custom_field ) )
        return is_array( $custom_field ) ? stripslashes_deep( $custom_field ) : stripslashes( wp_kses_decode_entities( $custom_field ) );

    return false;
}

/**
 * Register the Meta box
 */
function alep_add_custom_meta_box() {
    add_meta_box( \'alep-meta-box\', __( \'Metabox Example\', \'alep\' ), \'alep_meta_box_output\', \'post\', \'normal\', \'high\' );
    add_meta_box( \'alep-meta-box\', __( \'Metabox Example\', \'alep\' ), \'alep_meta_box_output\', \'page\', \'normal\', \'high\' );
}
add_action( \'add_meta_boxes\', \'alep_add_custom_meta_box\' );


/**
 * Output the Meta box
 */
function alep_meta_box_output( $post ) {
    // create a nonce field
    wp_nonce_field( \'my_alep_meta_box_nonce\', \'alep_meta_box_nonce\' ); ?>

    <p>
        <label for="alep_textfield1"><?php _e( \'Textfield 1\', \'alep\' ); ?>:</label>
        <input type="text" name="alep_textfield1" id="alep_textfield1" value="<?php echo alep_get_custom_field( \'alep_textfield1\' ); ?>" size="70" />
    </p>

    <p>
        <label for="alep_textfield2"><?php _e( \'Textfield 2\', \'alep\' ); ?>:</label>
        <input type="text" name="alep_textfield2" id="alep_textfield2" value="<?php echo alep_get_custom_field( \'alep_textfield2\' ); ?>" size="70" />
    </p>

    <p>
        <label for="alep_textfield3"><?php _e( \'Textfield 3\', \'alep\' ); ?>:</label>
        <input type="text" name="alep_textfield3" id="alep_textfield3" value="<?php echo alep_get_custom_field( \'alep_textfield3\' ); ?>" size="70" />
    </p>

    <p>
        <label for="alep_textfield4"><?php _e( \'Textfield 4\', \'alep\' ); ?>:</label>
        <input type="text" name="alep_textfield4" id="alep_textfield4" value="<?php echo alep_get_custom_field( \'alep_textfield4\' ); ?>" size="70" />
    </p>

    <p>
        <label for="alep_textfield5"><?php _e( \'Textfield 5\', \'alep\' ); ?>:</label>
        <input type="text" name="alep_textfield5" id="alep_textfield5" value="<?php echo alep_get_custom_field( \'alep_textfield5\' ); ?>" size="70" />
    </p>

    <?php
}


/**
 * Save the Meta box values
 */
function alep_meta_box_save( $post_id ) {
    // Stop the script when doing autosave
    if( defined( \'DOING_AUTOSAVE\' ) && DOING_AUTOSAVE ) return;

    // Verify the nonce. If insn\'t there, stop the script
    if( !isset( $_POST[\'alep_meta_box_nonce\'] ) || !wp_verify_nonce( $_POST[\'alep_meta_box_nonce\'], \'my_alep_meta_box_nonce\' ) ) return;

    // Stop the script if the user does not have edit permissions
    if( !current_user_can( \'edit_post\', get_the_id() ) ) return;

    // Save the textfield
    if( isset( $_POST[\'alep_textfield1\'] ) )
        update_post_meta( $post_id, \'alep_textfield1\', esc_attr( $_POST[\'alep_textfield1\'] ) );

    // Save the textfield
    if( isset( $_POST[\'alep_textfield2\'] ) )
        update_post_meta( $post_id, \'alep_textfield2\', esc_attr( $_POST[\'alep_textfield2\'] ) );

    // Save the textfield
    if( isset( $_POST[\'alep_textfield3\'] ) )
        update_post_meta( $post_id, \'alep_textfield3\', esc_attr( $_POST[\'alep_textfield3\'] ) );

    // Save the textfield
    if( isset( $_POST[\'alep_textfield4\'] ) )
        update_post_meta( $post_id, \'alep_textfield4\', esc_attr( $_POST[\'alep_textfield4\'] ) );

    // Save the textfield
    if( isset( $_POST[\'alep_textfield5\'] ) )
        update_post_meta( $post_id, \'alep_textfield5\', esc_attr( $_POST[\'alep_textfield5\'] ) );
}
add_action( \'save_post\', \'alep_meta_box_save\' );

如何使自定义字段值与元框输入框中输入的值完全相同？

我之所以需要它，是因为我试图在侧栏中显示短代码（在主要帖子内容之外）。

编辑：删除esc_attr视觉效果很好，但我没有代码验证。。。

$input = esc_attr ($_POST[\'alep_textfield1\']);
$input = str_replace (\'"\', \'"\', $input);
update_post_meta ($post_id, \'alep_textfield1\', $input);