我正在尝试替换WordPress插件（简单属性列表）中的函数，但目前没有成功。

在类中这样添加操作：

<?php
/**
 * Search Object
 *
 * @package     EPL
 * @subpackage  Classes/Search
 * @copyright   Copyright (c) 2016, Merv Barrett
 * @license     http://opensource.org/licenses/gpl-2.0.php GNU Public License
 * @since       3.0
 */
// Exit if accessed directly
if ( ! defined( \'ABSPATH\' ) ) {
    exit;
}
/**
 * EPL_Search_Fields Class
 *
 * @since      3.0
 * @author     Taher Atashbar <[email protected]>
 */
class EPL_Search_Fields {
    /**
     * Initialize hooks.
     *
     * @since  3.0
     * @return void
     */
    public function init() {
        // Initialize hooks for displaying search frontend fields.
        add_action( \'epl_frontend_search_field_text\', array( $this, \'render_text\' ), 10, 5 );
        add_action( \'epl_frontend_search_field_checkbox\', array( $this, \'render_checkbox\' ), 10, 5 );
        add_action( \'epl_frontend_search_field_select\', array( $this, \'render_select\' ), 10, 5 );
        add_action( \'epl_frontend_search_field_multiple_select\', array( $this, \'render_multiple_select\' ), 10, 5 );
        add_action( \'epl_frontend_search_field_number\', array( $this, \'render_number\' ), 10, 5 );
        add_action( \'epl_frontend_search_field_hidden\', array( $this, \'render_hidden\' ), 10, 5 );
        add_action( \'epl_frontend_search_field_radio\', array( $this, \'render_radio\' ), 10, 5 );
        add_action( \'epl_frontend_search_field_checkbox_multiple\', array( $this, \'render_checkbox_multiple\' ), 10, 5 );
    }

View the file on Github

我尝试替换的函数是render\\u select。在文件的下面：

/**
     * Renders search frontend Select field.
     *
     * @since  3.0
     * @param  array  $field
     * @param  string $config
     * @param  string $value
     * @param  string $post_type
     * @param  string $property_status
     * @return void
     */
    public function render_select( array $field, $config = \'\', $value = \'\', $post_type = \'\', $property_status = \'\' ) {
        if ( isset( $field[\'wrap_start\'] ) ) {
            echo \'<div class="\' . $field[\'wrap_start\'] . \'">\';
        }
        ?>
        <div class="epl-search-row epl-search-row-select epl-<?php echo $field[\'meta_key\']; ?> fm-block <?php echo isset( $field[\'class\'] ) ? $field[\'class\'] : \'\'; ?>">
            <label for="<?php echo $field[\'meta_key\']; ?>" class="epl-search-label fm-label">
                <?php echo apply_filters( \'epl_search_widget_label_\' . $field[\'meta_key\'], $field[\'label\'] ); ?>
            </label>
            <div class="field">
                <select
                    name="<?php echo $field[\'meta_key\']; ?>"
                    id="<?php echo $field[\'meta_key\']; ?>"
                    class="in-field field-width">
                    <option value="">
                        <?php echo apply_filters( \'epl_search_widget_option_label_\' . $field[\'option_filter\'], __( \'Any\', \'easy-property-listings\'  ) ); ?>
                    </option>
                    <?php
                    if ( isset( $field[\'options\'] ) && ! empty( $field[\'options\'] ) ) {
                        foreach ( $field[\'options\'] as $k => $v ) {
                            echo \'<option value="\' . esc_attr( $k ) . \'"\' . selected( $k, $value, false ) . \'>\' . $v . \'</option>\';
                        }
                    }
                    ?>
                </select>
            </div>
        </div>
        <?php
        if ( isset( $field[\'wrap_end\'] ) ) {
            echo \'</div>\';
        }
    }

我正在尝试删除搜索栏中选择输入中的第一个选项值：

<option value="">
    <?php echo apply_filters( \'epl_search_widget_option_label_\' . $field[\'option_filter\'], __( \'Any\', \'easy-property-listings\'  ) ); ?>
</option>

因此，我只是复制了这个render\\u select函数，但插件中没有“option”，我将其命名为“render\\u select2”，它可以正常工作。在没有第一个选项值的情况下，我将选择输入加倍。

现在，我尝试删除初始操作。我尝试了很多代码（在这个论坛和谷歌的一些帖子上），但都没有成功。

在我的功能中。php：

function remove_searchfield() {

    $class = \'EPL_Search_Fields\'; // Name of class the method was built in.
    $tag = \'epl_frontend_search_field_select\'; // the name of the hook
    $function = \'render_select\'; // the function you wish to remove
    $priority = 10; // must be an integer

    global $class;
    remove_action ( $tag, array( $class, $function ), $priority);
}
add_action( \'init\', \'remove_searchfield\');

你们知道怎么做吗？我的PhP知识有限，我快疯了；）。

欢迎提供任何建议。

非常感谢。

function remove_searchfield() {

    $tag = \'epl_frontend_search_field_select\'; // the name of the hook
    $function = \'render_select\'; // the function you wish to remove
    $priority = 10; // must be an integer

    remove_action ( $tag, array( Easy_Property_Listings::instance()->search_fields, $function ), $priority);
}
add_action( \'init\', \'remove_searchfield\');