<?php
$url = "https://www.tefas.gov.tr/FonAnaliz.aspx?FonKod=ST1";
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$html = curl_exec($ch);
curl_close($ch);

$dom = new DOMDocument();
@$dom->loadHTML(mb_convert_encoding($html, 'HTML-ENTITIES', 'UTF-8')); // UTF-8
$xpath = new DOMXPath($dom);

$result = $xpath->query("//*[@id='MainContent_PanelInfo']/div[1]/ul[1]/li[1]/span");

if ($result->length > 0) {
    $veri = $result->item(0)->nodeValue;
    echo "Çekilen Veri: " . $veri;
} else {
    echo "Çalışmadı.";
}
?>