问题是您无法区分匿名函数和其他函数，因此可以删除闭包（即匿名函数），但if more than one closure act on same filter at same priority you have to make a choice, remove them all, ore remove only one （不知道具体是哪个）。

我将展示如何使用一个从您发布的@toscho answer中高度派生的函数来删除它们：

/**
 * Remove an object filter.
 *
 * @param  string $tag                Hook name.
 * @param  string $class              Class name. Use \'Closure\' for anonymous functions.
 * @param  string|void $method        Method name. Leave empty for anonymous functions.
 * @param  string|int|void $priority  Priority
 * @return void
 */
function remove_object_filter( $tag, $class, $method = NULL, $priority = NULL ) {
  $filters = $GLOBALS[\'wp_filter\'][ $tag ];
  if ( empty ( $filters ) ) {
    return;
  }
  foreach ( $filters as $p => $filter ) {
    if ( ! is_null($priority) && ( (int) $priority !== (int) $p ) ) continue;
    $remove = FALSE;
    foreach ( $filter as $identifier => $function ) {
      $function = $function[\'function\'];
      if (
        is_array( $function )
        && (
          is_a( $function[0], $class )
          || ( is_array( $function ) && $function[0] === $class )
        )
      ) {
        $remove = ( $method && ( $method === $function[1] ) );
      } elseif ( $function instanceof Closure && $class === \'Closure\' ) {
        $remove = TRUE;
      }
      if ( $remove ) {
        unset( $GLOBALS[\'wp_filter\'][$tag][$p][$identifier] );
      }
    }
  }
}

这个$priority 参数是可选的，但在删除闭包时应始终使用该参数，否则该函数将删除添加到过滤器中的任何闭包，无论其优先级如何，因为$priority 将删除使用目标类/方法或闭包的所有过滤器。

如何使用

// remove a static method
remove_object_filter( \'a_filter_hook\', \'AClass\', \'a_static_method\', 10 );

// remove a dynamic method
remove_object_filter( \'a_filter_hook\', \'AClass\', \'a_dynamic_method\', 10 );

// remove a closure
remove_object_filter( \'a_filter_hook\', \'Closure\', NULL, 10 );

匿名筛选器和操作可以通过以下方式在本机删除：

remove_filter( $tag, function(){}, $priority )

如果多个筛选器或操作连接到具有相同优先级的同一标记，则它将删除添加的最新筛选器或操作。如果需要保留一个过滤器，则必须删除所有过滤器，直到需要删除的过滤器为止，然后根据需要重新添加其他过滤器。

// Filter which was added and needs to be removed
add_filter( \'manage_edit-comments_columns\', function( $default ) {
    $columns[\'smr_comment_rate\']  = __( \'Rate\', \'txtdmn\' );

    return array_slice( $default, 0, 3, true ) + $columns + array_slice( $default, 2, NULL, true );
} );

// Removes the last anonymous filter to be added
remove_filter( \'manage_edit-comments_columns\', function(){} );

EDIT

我现在看到的删除过滤器的唯一方法是手动调整$wp_filter 全局变量。

global $wp_filter;
unset( $wp_filter[ $tag ]->callbacks[ $priority ][ $identifier ] );
// or
foreach ( $wp_filter[ $tag ]->callbacks[ $priority ] as $identifier => $callback ) {
    // Match identifier as necessary
}
// or
array_pop( $wp_filter[ $tag ]->callbacks[ $priority ] );

如果您添加优先级为11的过滤器，那么它会紧随其后吗？这很难看，但对你来说可能有用。

add_filter( \'manage_edit-comments_columns\', function( $default ) {
    unset( $default[\'smr_comment_rate\'] );

    return $default;
}, 11, 1 );

也许有人需要它：我修改了remove_object_filter 在@gmazzap answer中，要使其与WP 4.7+配合使用，请执行以下操作：

/**
 * Remove an object filter.
 *
 * @param  string $tag                Hook name.
 * @param  string $class              Class name. Use \'Closure\' for anonymous functions.
 * @param  string|void $method        Method name. Leave empty for anonymous functions.
 * @param  string|int|void $priority  Priority
 * @return void
 */
function remove_object_filter( $tag, $class, $method = NULL, $priority = NULL ) {
    global $wp_version;
    $new_wp_filter_struct = false;

    $filters = $GLOBALS[\'wp_filter\'][ $tag ];
    if ( empty ( $filters ) ) {
        return;
    }

    if (version_compare( $wp_version, \'4.7\', \'>=\' ) && isset($filters->callbacks)) { // new \'wp_filter\' structure (WP >= 4.7)
        $filters = $filters->callbacks;
        $new_wp_filter_struct = true;
    }

    foreach ( $filters as $p => $filter ) {
        if ( ! is_null($priority) && ( (int) $priority !== (int) $p ) ) continue;
        $remove = FALSE;
        foreach ( $filter as $identifier => $function ) {
            $function = $function[\'function\'];
            if (
                is_array( $function )
                && (
                    is_a( $function[0], $class )
                    || ( is_array( $function ) && $function[0] === $class )
                )
            ) {
                $remove = ( $method && ( $method === $function[1] ) );
            } elseif ( $function instanceof Closure && $class === \'Closure\' ) {
                $remove = TRUE;
            }
            if ( $remove ) {
                if ($new_wp_filter_struct) {
                    unset( $GLOBALS[\'wp_filter\'][$tag]->callbacks[$p][$identifier] );
                    if (count($GLOBALS[\'wp_filter\'][$tag]->callbacks[$p]) == 0) {
                        unset($GLOBALS[\'wp_filter\'][$tag]->callbacks[$p]);
                    }
                }
                else {
                    unset( $GLOBALS[\'wp_filter\'][$tag][$p][$identifier] );
                }
            }
        }
    }
}