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。