本文实例讲述了PHP7基于curl实现的上传图片功能。分享给大家供大家参考，具体如下：

根据php版本不同，curl模拟表单上传的方法不同

php5.5之前

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$curl = curl_init();
if (defined('CURLOPT_SAFE_UPLOAD')) {
  curl_setopt($curl, CURLOPT_SAFE_UPLOAD, false);
}
$data = array('file' => '@' . realpath($path));//‘@' 符号告诉服务器为上传资源
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, 1 );
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_USERAGENT,"TEST");
$result = curl_exec($curl);
$error = curl_error($curl);

php5.5之后，到php7

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$curl = curl_init();
curl_setopt($curl, CURLOPT_SAFE_UPLOAD, true);
$data = array('file' => new \CURLFile(realpath($path)));
url_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, 1 );
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_USERAGENT,"TEST");
$result = curl_exec($curl);
$error = curl_error($curl);

下面提供一个兼容的方法：

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$curl = curl_init();
if (class_exists('\CURLFile')) {
 curl_setopt($curl, CURLOPT_SAFE_UPLOAD, true);
$data = array('file' => new \CURLFile(realpath($path)));//>=5.5
} else {
 if (defined('CURLOPT_SAFE_UPLOAD')) {
  curl_setopt($curl, CURLOPT_SAFE_UPLOAD, false);
 }
 $data = array('file' => '@' . realpath($path));//<=5.5
}
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, 1 );
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($curl, CURLOPT_USERAGENT,"TEST");
$result = curl_exec($curl);
$error = curl_error($curl);

其中：

$path：为待上传的图片地址

$url：目标服务器地址

例如

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$url="http://localhost/upload.php";
$path = "/bg_right.jpg"

upload.php示例：

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<?php
  file_put_contents(time().".json", json_encode($_FILES));
  $tmp_name = $_FILES['file']['tmp_name'];
  $name = $_FILES['file']['name'];
  move_uploaded_file($tmp_name,'audit/'.$name);
?>

 

PHP7.0演示示例

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/**xm编写php7.0模拟fomadata文件上传
 * @param $url
 * @param $arr
 */
function curl_post_file($url,$arr){
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_SAFE_UPLOAD, true);
    //$data = array('media' => new \CURLFile(realpath($p)));
    $data=$arr;
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_POST, 1 );
    curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($curl, CURLOPT_USERAGENT,"TEST");
    $result = curl_exec($curl);
    $error = curl_error($curl);
    return $result;
}

　　调用演示-微信敏感人物检测

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$url = "https://api.weixin.qq.com/wxa/img_sec_check?access_token=".$token;
$p=str_replace("\\","/",ROOT_PATH."public".$pic);//图片路径
$data = array('media' => new \CURLFile(realpath($p)));
$mgan_json=curl_post_file($url,$data);