PHP method to obtain remote image size and size

This article mainly introduces the relevant information on how to efficiently obtain the size and size of remote images in PHP. I hope that through this article everyone can realize such a function. Friends in need can refer to it

PHP How to efficiently obtain the size and size of remote images

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Implementation code:

/** 
 * 获取远程图片的宽高和体积大小 
 * 
 * @param string $url 远程图片的链接 
 * @param string $type 获取远程图片资源的方式, 默认为 curl 可选 fread 
 * @param boolean $isGetFilesize 是否获取远程图片的体积大小, 默认false不获取, 设置为 true 时 $type 将强制为 fread 
 * @return false|array 
 */ 
function myGetImageSize($url, $type = 'curl', $isGetFilesize = false)  
{ 
  // 若需要获取图片体积大小则默认使用 fread 方式 
  $type = $isGetFilesize ? 'fread' : $type; 
  
   if ($type == 'fread') { 
    // 或者使用 socket 二进制方式读取, 需要获取图片体积大小最好使用此方法 
    $handle = fopen($url, 'rb'); 
  
    if (! $handle) return false; 
  
    // 只取头部固定长度168字节数据 
    $dataBlock = fread($handle, 168); 
  } 
  else { 
    // 据说 CURL 能缓存DNS 效率比 socket 高 
    $ch = curl_init($url); 
    // 超时设置 
    curl_setopt($ch, CURLOPT_TIMEOUT, 5); 
    // 取前面 168 个字符 通过四张测试图读取宽高结果都没有问题,若获取不到数据可适当加大数值 
    curl_setopt($ch, CURLOPT_RANGE, '0-167'); 
    // 跟踪301跳转 
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1); 
    // 返回结果 
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
  
    $dataBlock = curl_exec($ch); 
  
    curl_close($ch); 
  
    if (! $dataBlock) return false; 
  } 
  
  // 将读取的图片信息转化为图片路径并获取图片信息,经测试,这里的转化设置 jpeg 对获取png,gif的信息没有影响,无须分别设置 
  // 有些图片虽然可以在浏览器查看但实际已被损坏可能无法解析信息  
  $size = getimagesize('data://image/jpeg;base64,'. base64_encode($dataBlock)); 
  if (empty($size)) { 
    return false; 
  } 
  
  $result['width'] = $size[0]; 
  $result['height'] = $size[1]; 
  
  // 是否获取图片体积大小 
  if ($isGetFilesize) { 
    // 获取文件数据流信息 
    $meta = stream_get_meta_data($handle); 
    // nginx 的信息保存在 headers 里，apache 则直接在 wrapper_data  
    $dataInfo = isset($meta['wrapper_data']['headers']) ? $meta['wrapper_data']['headers'] : $meta['wrapper_data']; 
  
    foreach ($dataInfo as $va) { 
      if ( preg_match('/length/iU', $va)) { 
        $ts = explode(':', $va); 
        $result['size'] = trim(array_pop($ts)); 
        break; 
      } 
    } 
  } 
  
  if ($type == 'fread') fclose($handle); 
  
  return $result; 
} 
  
// 测试的图片链接 
echo &#39;<pre class="brush:php;toolbar:false">&#39;; 
$result = myGetImageSize(&#39;http://s6.mogujie.cn/b7/bao/120630/2kpa6_kqywusdel5bfqrlwgfjeg5sckzsew_345x483.jpg_225x999.jpg&#39;, &#39;curl&#39;); 
print_r($result); 
echo &#39;<hr />&#39;; 
$result = myGetImageSize(&#39;http://s5.mogujie.cn/b7/bao/120629/6d3or_kqytasdel5bgevsugfjeg5sckzsew_801x1193.jpg&#39;, &#39;fread&#39;); 
print_r($result); 
echo &#39;<hr />&#39;; 
$result = myGetImageSize(&#39;http://hiphotos.baidu.com/zhengmingjiang/pic/item/1c5f338c6d22d797503d92f9.jpg&#39;, &#39;fread&#39;, true); 
print_r($result); 
echo &#39;<hr />&#39;; 
$result = myGetImageSize(&#39;http://www.vegandocumentary.com/wp-content/uploads/2009/01/imveganlogotransparentbackground.png&#39;, &#39;curl&#39;, true); 
print_r($result);

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