PHP7基于curl实现的上传图片功能

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

$curl = curl_init();
if (defined(\'CURLOPT_SAFE_UPLOAD\')) {
  curl_setopt($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

$curl = curl_init();
curl_setopt($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：

$curl = curl_init();
if (class_exists(\'\\CURLFile\')) {
 curl_setopt($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

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

upload.php示例：

<?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);
?>

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希望本文所述对大家PHP程序设计有所帮助。