/**
 * Define a new function that uses $args and wp_parse_args()
 */
function explain_parse_args( $args ) {
    $defaults = array (
        \'text\' => \'wp_parse_args() merges $args into $defaults\',
        \'before\' => "
",
        \'after\' => "
 \\n",
        \'echo\' => TRUE
    );

    // Parse incomming $args into an array and merge it with $defaults
    $args = wp_parse_args( $args, $defaults );

    // OPTIONAL: Declare each item in $args as its own variable i.e. $type, $before.
    extract( $args, EXTR_SKIP );

    $output = $before . $text . $after;

    if (!$echo) 
        return $output;

    echo $output;
}

/**
 * Run our new function using the defaults (no $args)
 * This would print out: 
 *  
wp_parse_args() merges $args into $defaults
 */
explain_parse_args();

/**
 * Run the function with some options overriden with an array
 * This would echo the output with the modified text and before arguments:
 *  A better explanation

 */
explain_parse_args( array (
    \'text\' => "A better explanation",
    \'before\' => ""
) );

/**
 * We can also pass in URL-style string-query and it will be converted
 * This would set $args[\'echo\'] to 1 and $args[\'text\'] to 0 
 */
explain_parse_args( \'echo=1&text=0\' );

我会这样做：

$args = array (
  \'posts_per_page\' => 10,
  \'order\' => \'DESC\'
);
$tax_query = array(\'relation\' => \'OR\');

for($i=0;$i<count($Tax),$i++){
  array_push($tax_query, array(
    \'taxonomy\' => $Tax[$i],
    \'field\' => \'slug\',
    \'terms\' => array( $Tag )
  ));
}

$args[\'tax_query\'] = $tax_query;

$args = [
  \'posts_per_page\' => 10,
  \'order\' => \'DESC\'
];

$tax_query = [\'relation\' => \'OR\'];

for($i=0;$i<count($Tax),$i++){
  $tax_query[] = [
    \'taxonomy\' => $Tax[$i],
    \'field\' => \'slug\',
    \'terms\' => array( $Tag )  
  ];
}

$args[\'tax_query\'] = $tax_query;