PHP文件怎么上传_PHP实现大文件上传功能教程

const file = document.getElementById('fileInput').files[0];
const chunkSize = 10 * 1024 * 1024; // 每片10MB
let index = 0;
<p>for (let start = 0; start < file.size; start += chunkSize) {
const chunk = file.slice(start, start + chunkSize);
const formData = new FormData();
formData.append('chunk', chunk);
formData.append('index', index++);
formData.append('total', Math.ceil(file.size / chunkSize));
formData.append('filename', file.name);</p><p>fetch('upload.php', { method: 'POST', body: formData });
}</p>

$uploadDir = 'uploads/';
$chunk = $_FILES['chunk']['tmp_name'];
$index = $_POST['index'];
$filename = $_POST['filename'];
$totalChunks = $_POST['total'];
<p>$targetPath = $uploadDir . $filename . '.part' . $index;
move_uploaded_file($chunk, $targetPath);</p><p>// 判断是否全部上传完成
$allUploaded = true;
for ($i = 0; $i < $totalChunks; $i++) {
if (!file_exists($uploadDir . $filename . '.part' . $i)) {
$allUploaded = false;
break;
}
}</p><p>if ($allUploaded) {
$finalFile = fopen($uploadDir . $filename, 'wb');
for ($i = 0; $i < $totalChunks; $i++) {
$part = fopen($uploadDir . $filename . '.part' . $i, 'rb');
stream_copy_to_stream($part, $finalFile);
fclose($part);
unlink($uploadDir . $filename . '.part' . $i); // 删除分片
}
fclose($finalFile);
echo json_encode(['status' => 'success', 'message' => 'Upload complete']);
}</p>