(PHP)如何验证.svg (文件上传)

<?php
$targetDir = 'uploads/'; // 目标文件夹路径
$allowedExtensions = ['svg']; // 允许的扩展名

// 检查文件类型
if ($_FILES['file']['type'] !== 'image/svg+xml') {
    die('Invalid file type. Only SVG files are allowed.');
}

// 检查文件扩展名
$extension = strtolower(pathinfo($_FILES['file']['name'], PATHINFO_EXTENSION));
if (!in_array($extension, $allowedExtensions)) {
    die('Invalid file extension. Only SVG files are allowed.');
}

// 检查文件内容
$fileContent = file_get_contents($_FILES['file']['tmp_name']);
if (!preg_match('/<svg[^>]+>/', $fileContent)) {
    die('Invalid SVG file. The file must contain an SVG element.');
}

// 处理文件上传
$targetFile = $targetDir . $_FILES['file']['name'];
if (move_uploaded_file($_FILES['file']['tmp_name'], $targetFile)) {
    echo 'File uploaded successfully.';
} else {
    echo 'Failed to upload file.';
}
?>