我的主题有以下两个功能：

function content($limit) {
     global $post;
      $content = explode(\' \', get_the_content(), $limit);
      if (count($content)>=$limit) {
        array_pop($content);
        $content = implode(" ",$content);
$content = wp_strip_all_tags($content, true);
      } else {
        $content = implode(" ",$content);
      } 
      $content = preg_replace(\'/\\[.+\\]/\',\'\', $content);
      $content = apply_filters(\'the_content\', $content); 
      $content = str_replace(\']]>\', \']]>\', $content);
      return $content;
    }

function contentnoimg($limit) {
     global $post;
      $content = explode(\' \', get_the_content(), $limit);
      if (count($content)>=$limit) {
        array_pop($content);
        $content = implode(" ",$content);
$content = wp_strip_all_tags($content, true);
      } else {
        $content = implode(" ",$content);
      }   
      $content = preg_replace(\'/(<img.+?>)/\',\'\', $content);
      $content = apply_filters(\'the_content\', $content); 
      $content = str_replace(\']]>\', \']]&gt;\', $content);
      return $content;
    }

在循环中，它被称为：

<?php if ( has_post_thumbnail() ) {
the_post_thumbnail( \'full\', array(\'class\'=>\'post_thumbnail_common\', \'alt\' => get_the_title() , \'title\' => get_the_title(), \'itemprop\'=>\'image\' ));
echo contentnoimg(41);} else { echo content(41); } ?>

我想网站显示the_excerpt(); 只有当它存在时。如果has_excerpt() 是负数，则应按当前显示的内容工作get_the_content()

代码应该是什么样子？我尝试了不同的方法，但我的网站停止工作，所以我做错了什么。

function content( $limit ) {
    global $post;

    if( has_excerpt() ){
        $content = the_excerpt();
    } else {
      $content = explode( \' \', get_the_content(), $limit );
      if ( count($content) >= $limit ) {
        array_pop( $content );
        $content = implode( " ", $content );
        $content = wp_strip_all_tags( $content, true );
      } else {
        $content = implode( " ", $content );
      }

      $content = preg_replace( \'/\\[.+\\]/\',\'\', $content );
      $content = apply_filters( \'the_content\', $content ); 
      $content = str_replace( \']]>\', \']]>\', $content );
    }

    return $content;
}