PHP获取远程文件大小

<?php
$url = "https://www.x.com/a.jpg"; // 替换为你要获取大小的远程文件URL

$headers = get_headers($url, 1);

if (isset($headers['Content-Length'])) {
$fileSize = $headers['Content-Length'];
echo "文件大小: " . $fileSize . " 字节";
} else {
echo "无法获取文件大小";
}
?>