Transpose first column of an html table in header - php

Question

I’m trying to scrape a table on Borsa Italiana
I use this code
<?php
$url = "https://www.borsaitaliana.it/borsa/azioni/global-equity-market/dati-completi.html?isin=IT0001477402";
$html = file_get_contents($url);
libxml_use_internal_errors(true);
$doc = new \DOMDocument();
if($doc->loadHTML($html))
{
$result = new \DOMDocument();
$result->formatOutput = true;
$table = $result->appendChild($result->createElement("table"));
$tbody = $table->appendChild($result->createElement("tbody"));
$xpath = new \DOMXPath($doc);
foreach($xpath->query("//table[#class=\"m-table -clear-m\"]/tbody/tr") as $row)
{
$newRow = $tbody->appendChild($result->createElement("tr"));
foreach($xpath->query("./td[position()>0 and position()<3]", $row) as $cell)
{
$newRow->appendChild($result->createElement("td", trim($cell->nodeValue)));
}
}
}
echo $result->saveHTML($result->documentElement);
?>
Result is a table with two columns and more rows. I would transpose first column in header, in order to save result in my database for my personal use.
Can anyone help me?
Thank you

Answer 1

Try it:
<?php
$url = "https://www.borsaitaliana.it/borsa/azioni/global-equity-market/dati-completi.html?isin=IT0001477402";
$html = file_get_contents($url);
libxml_use_internal_errors(true);
$doc = new \DOMDocument();
if ($doc->loadHTML($html)) {
$result = new \DOMDocument();
$result->formatOutput = true;
$xpath = new \DOMXPath($doc);
// collects data in $arr -->
$arr = [];
foreach ($xpath->query("//table[#class=\"m-table -clear-m\"]/tbody/tr") as $row) {
$itm = [];
foreach ($xpath->query("./td[position()>0 and position()<3]", $row) as $cell) {
$itm[] = trim($cell->nodeValue);
}
$arr[] = $itm;
}
// <--
$table = $result->appendChild($result->createElement("table"));
// outputs head -->
$thead = $table->appendChild($result->createElement("thead"));
$newRow = $thead->appendChild($result->createElement("tr"));
foreach (array_column($arr, 0) as $th) {
$newRow->appendChild($result->createElement("th", $th));
}
// <--
// outputs data -->
$tbody = $table->appendChild($result->createElement("tbody"));
$newRow = $tbody->appendChild($result->createElement("tr"));
foreach ($arr as $row) {
$newRow->appendChild($result->createElement("td", isset($row[1])? $row[1]: ""));
}
// <--
}
echo $result->saveHTML($result->documentElement);
But I agree with #tim - you have to use API for that.