首先，一个人永远不应该依赖原始的$_REQUEST: 相信我，这是一个安全问题。

PHP有2个功能：filter_input 和filter_input_array 这有助于清理请求数据。

此外，在您的请求转储中，我没有看到任何$_REQUEST[\'custom_bath\'], 但您正在使用该值，这可能是问题的原因。在使用变量之前，应该检查它是否已设置。

使用我的建议，您的代码会变成这样

$args = array(
  \'custom_textarea\'   => FILTER_SANITIZE_STRING,
  \'custom_price\'      => FILTER_VALIDATE_INT,
  \'custom_price1\'     => FILTER_VALIDATE_INT,
  \'custom_beds\'       => FILTER_SANITIZE_STRING,
  \'custom_bath\'       => FILTER_SANITIZE_STRING,
  \'custom_garage\'     => FILTER_SANITIZE_STRING
);

$get = filter_input_array( INPUT_GET, $args, TRUE );
$post = filter_input_array( INPUT_POST, $args, TRUE );
$request = array_merge( $get, $post );

$query_args = array( \'relation\' => \'OR\' );

if ( ! empty( $request[\'custom_textarea\'] ) ) {
   $query_args[] = array(
     \'key\' => \'custom_textarea\',
     \'value\' => "%{$request[\'custom_textarea\']}%", 
     \'compare\' => \'LIKE\'
   );
}

if ( ! empty( $request[\'custom_price\'] ) && ! empty($request[\'custom_price1\']) ) {
   $query_args[] = array(
     \'key\' => \'custom_price\',
     \'value\' => array( "{$request[\'custom_price\']}", "{$request[\'custom_price1\']}" ), 
     \'compare\' => \'BETWEEN\',
     \'type\'    => \'SIGNED\'
   );
}

if ( ! empty( $request[\'custom_beds\'] ) ) {
   $query_args[] = array(
     \'key\' => \'custom_beds\',
     \'value\' => "{$request[\'custom_beds\']}", 
   );
}

if ( ! empty( $request[\'custom_bath\'] ) ) {
   $query_args[] = array(
     \'key\' => \'custom_bath\',
     \'value\' => "{$request[\'custom_bath\']}", 
   );
}   

if ( ! empty( $request[\'custom_garage\'] ) ) {
   $query_args[] = array(
     \'key\' => \'custom_garage\',
     \'value\' => "{$request[\'custom_garage\']}", 
   );
} 

$query = new WP_Query( $query_args );  

问题是，当您有一个字符串变量Wordpress时，它不会自动向该变量添加引号，因此搜索过滤器不会生成任何结果。

我建议以下答案。

$custom_textarea = \'\\\'\'.$_REQUEST[\'custom_textarea\'].\'\\\'\';  // declare a variable something like this.

\'meta_query\' => array(
                     \'relation\' => \'OR\',
                     array(
                      \'key\' => \'custom_textarea\',
                      \'value\' => $custom_textarea, 
                      \'compare\' => \'LIKE\'
                      ),
                      array(
                      \'key\' => \'custom_price\',
                      \'value\' => array( $_REQUEST[\'custom_price\'], $_REQUEST[\'custom_price1\'] ),
                      \'type\' => \'numeric\',
                      \'compare\' => \'BETWEEN\'
                      ),
                      array(
                      \'key\' => \'custom_beds\',
                      \'value\' => $_REQUEST[\'custom_beds\'],
                      \'compare\' => \'=\'
                      ),
                      array(
                      \'key\' => \'custom_bath\',
                      \'value\' => $_REQUEST[\'custom_bath\'],
                      \'compare\' => \'=\'
                      ),
                      array(
                      \'key\' => \'custom_garage\',
                      \'value\' => $_REQUEST[\'custom_garage\'],
                      \'compare\' => \'=\'
                      )
                      )

对于我的，我在搜索结果页面上也是这样使用的：

$pricemax = $_POST[\'price\'];

array(
        \'key\' => \'custom_rent\',
        \'value\' => array(\'\', $pricemax),
        \'compare\' => \'BETWEEN\',
        \'type\' => \'NUMERIC\'
        ),