phpcms如何上传图片

<form action="index.php?m=content&c=upload&a=do_upload" method="post" enctype="multipart/form-data">
    <input type="file" name="file" />
    <input type="submit" value="上传" />
</form>

<?php
// 检查是否有文件上传
if (isset($_FILES['file'])) {
    $file = $_FILES['file'];

    // 获取文件信息
    $fileName = $file['name'];
    $fileTmpName = $file['tmp_name'];
    $fileSize = $file['size'];
    $fileType = $file['type'];

    // 检查文件类型和大小
    if ($fileType != "image/jpeg" && $fileType != "image/png" && $fileType != "image/gif") {
        echo "只允许上传 JPEG、PNG 和 GIF 格式的图片";
        exit;
    }
    if ($fileSize > 2 * 1024 * 1024) { // 限制文件大小为 2MB
        echo "文件大小不能超过 2MB";
        exit;
    }

    // 移动文件到指定目录
    $uploadPath = './uploads/';
    if (!file_exists($uploadPath)) {
        mkdir($uploadPath, 0777, true);
    }
    $destPath = $uploadPath . basename($fileName);
    if (move_uploaded_file($fileTmpName, $destPath)) {
        echo "文件上传成功";
    } else {
        echo "文件上传失败";
    }
}
?>