facebook og：当使用php回显图像URL时，图像内容在调试器中显示为空白

Question

facebook OG从回显的URL中获取图片，这可能吗？

因为我包含了一个将回显图像URL的php文件但是当我签入共享调试器时内容为空

<meta property="og:image" content="" />

我的元标记 ：

<meta property="og:image" content ="<?php include "meta_gambar.php"?>">

我刚尝试将直接网址图片投放到og:image content并且可以正常工作

但是包含一个将回显URL的php文件仍会导致空白

和php文件：

<?php
 $module=$_GET['module'];
 $id=$_GET['id'];
 if($module=='detailproduk'){
   //prepare query
   $stmt=mysqli_prepare($con,"SELECT gambar FROM produk WHERE id_produk=?");
    if($stmt===false){
       die("Prepare error" . htmlspecialchars($mysqli->error));
    }
    //Bind parameters
    $bp=mysqli_stmt_bind_param($stmt,"i",$id);
     if($bp===false){
        die("Binding error" . htmlspecialchars($stmt->error));
    }
     //Execute query
     $bp=mysqli_stmt_execute($stmt);
     if($bp===false){
         die("Execute error" . htmlspecialchars($stmt->error));
     }
     //bind result
     $bp=mysqli_stmt_bind_result($stmt,$gambar);
      if($bp===false){
          die("Result bind error" . htmlspecialchars($stmt->error));
      }
     //Fetch
      $bp=mysqli_stmt_fetch($stmt);
       if($bp===false){
           die("Fetching error" .htmlspecialchars($stmt->error));
      }
    $image = "http://images.rajafotocopy.com/foto_produk/$gambar";
   }else{
      $image = "http://images.rajafotocopy.com/raja.png";
 }
   echo"$image";
?>

此外我收到此错误

  

对象缺少必需值，未提供“url”类型的必需属性“og：image：url”。

显然是因为OG没有获取回显的URL

我运行了php文件，它返回了一个好的回显网址。所以它也应该回到og:image content

html元标记

<title> <?php include "dina_titel.php"; ?></title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta http-equiv='Content-Type' content='text/html; charset=UTF-8'>
<meta property="og:description" content=" <?php include "dina_meta1.php"; ?>">
<meta name="webcrawlers" content="all">
<meta name="rating" content="general">
<meta name="spiders" content="all">
<meta property="og:image" content ="<?php include 'meta_gambar.php'?>">

facebook刮刀看到的内容

 <meta http-equiv="content-type" content="text/html; charset=utf-8">
 <title> rajafotocopy sewa jual mesin fotocopy</title>
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 <meta property="og:description" content=" PT.Buana Citra Abadi Sewa mesin fotocopy &amp; Jual Mesin Fotocopy new/rekondisi murah import hub : [phone number]">
 <meta name="webcrawlers" content="all">
 <meta name="rating" content="general">
 <meta name="spiders" content="all">
 <meta property="og:image" content="">

请注意，对于og:description，内容将使用回显字符串

填充

但og:image内容为空