php 上传图文消息素材

<?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'];

    // 检查文件类型
    if ($fileType != "image/gif" && $fileType != "image/jpeg" && $fileType != "image/png") {
        echo "Only GIF, JPG and PNG images are allowed.";
        exit;
    }

    // 检查文件大小
    if ($fileSize > 2 * 1024 * 1024) { // 2MB
        echo "File size exceeds limit.";
        exit;
    }

    // 移动文件到目标目录
    $dest_path = 'uploads/' . $fileName;
    if (move_uploaded_file($fileTmpPath, $dest_path)) {
        echo "File is successfully uploaded.";
    } else {
        echo "There was some error moving the file to upload directory. Please make sure the upload directory is writable by web server.";
    }
} else {
    echo "There is some error in the file upload. Please check the following error.<br>";
    echo 'Error:' . $_FILES['file']['error'];
}
?>