php - 设置帖子的最小字符长度

我得到了用于发布标题和博客正文以及其他一些东西的代码。现在我想使用strlen设置标题和正文的最小字符长度，我的代码是

 if(isset($_POST['submit'])) {
   $title=$_POST['title'];
   $body=$_POST['body'];
   $category=$_POST['category'];
   $title = mysql_real_escape_string($title);
   $body = mysql_real_escape_string($body);
   $posted_by = $user;
   $bio = $bio;
   $id=$_SESSION['id'];
   $date = date ('Y-m-d');
   $body = htmlentities($body);
   if ($title && $body && $category) {
      $query = mysql_query("INSERT INTO blogs (id, title, body, posted_by, bio, category_id, posted) VALUES ('$id', '$title', '$body', '$posted_by','$bio', '$category', '$date')");
      if($query) {
        echo "posted";
      }
      else {
        echo "error";
      }
   }else {
    echo "data missing";
   }
}

只需插入标题和正文的最小字符要求，此代码就可以正常工作。我尝试过strlen的if if else语句，但是我不是编程专家，所以出现语法错误。

最佳答案

这可能对您有帮助。

 if(isset($_POST['submit'])) {
           $title=$_POST['title'];
           if(strlen($title)<8)
           {
               //codes to handle error
           }

   $body=$_POST['body'];
   if(strlen($body)<80)
           {
               //codes to handle error
           }
   $category=$_POST['category'];
   $title = mysql_real_escape_string($title);
   $body = mysql_real_escape_string($body);
   $posted_by = $user;
   $bio = $bio;
   $id=$_SESSION['id'];
   $date = date ('Y-m-d');
   $body = htmlentities($body);
   if ($title && $body && $category) {
      if(strlen($title)>8 && strlen($body>80))
           {

      $query = mysql_query("INSERT INTO blogs (id, title, body, posted_by, bio, category_id, posted) VALUES ('$id', '$title', '$body', '$posted_by','$bio', '$category', '$date')");
           }
        else {
                  $query = 0;
              }
      if($query) {
        echo "posted";

      }
      else {
        echo "error";
      }
   }else {
    echo "data missing";
   }