php后台图片上传

<?php
if ($_FILES['file']['error'] == UPLOAD_ERR_OK) {
    $fileTmpPath = $_FILES['file']['tmp_name'];
    $fileName = $_FILES['file']['name'];
    $fileSize = $_FILES['file']['size'];
    $fileType = $_FILES['file']['type'];

    // 验证文件类型和大小
    if ($fileType != "image/jpeg" && $fileType != "image/png") {
        echo "Invalid file type!";
        exit;
    }
    if ($fileSize > 2 * 1024 * 1024) { // 限制文件大小为2MB
        echo "File size exceeds limit!";
        exit;
    }

    // 保存文件到指定目录
    $savePath = "uploads/" . $fileName;
    if (move_uploaded_file($fileTmpPath, $savePath)) {
        echo "File uploaded successfully!";
    } else {
        echo "Failed to upload file!";
    }
} else {
    echo "Error uploading file!";
}
?>