Create HTML table from txt file - php

Question

I have the following attempt at my function, but it's just printing out everything in the contacts.txt file on one line...
function contactsTable(){
$file = fopen("contacts.txt", "r") or die("Unable to open file!");
echo "<tr><th>";
while (!feof($file)){
echo "<tr><th>";
$data = fgets($file);
echo "<tr><td>" . str_replace(',','</td><td>',$data) . '</td></tr>';
}
echo "<tr><th>";
echo '</table>';
fclose($file);
}
contacts.txt example like this;
Row 1 is headers ---> [value1, value2, value3, value4]
Row 2 is data ---> [value5, value6, value7, value8]
Is it possible to change my function so that Row 1 is using <th> tags so they are formatted as headers and the rest of the rows go into <td> tags for table data? I've tried to amend the logic but can't seem to get it.
TIA

Answer 1

Here is your contactsTable() function that prints the first contacts.txt line as table header and some basic HTML formatting for easy reading/debugging.
function contactsTable() {
$file = fopen('contacts.txt', 'r') or die('Unable to open file!');
$row = 0;
echo '<table>' . PHP_EOL;
while (!feof($file)) {
$row++;
$data = fgets($file);
if ($row === 1) {
echo '<tr>' . PHP_EOL;
echo '<th>' . str_replace(',', '</th><th>', $data) . '</th>' . PHP_EOL;
echo '</tr>' . PHP_EOL;
} else {
echo '<tr>' . PHP_EOL;
echo '<td>' . str_replace(',', '</td><td>', $data) . '</td>' . PHP_EOL;
echo '</tr>' . PHP_EOL;
}
}
echo '</table>' . PHP_EOL;
fclose($file);
}