PHP CSV stream parsing

PHP CSV stream parsing

Run as a PHP 8.0+ CLI script, for example php example.php. The multibyte example additionally requires mbstring.

<?php
$stream = fopen('php://temp', 'w+');
if ($stream === false) throw new RuntimeException('Cannot open stream');
try {
    fwrite($stream, "name,city\nAda,\"London, UK\"\n");
    rewind($stream);
    fgetcsv($stream, 0, ',', '"', ''); // header
    $row = fgetcsv($stream, 0, ',', '"', '');
    if ($row !== false) echo $row[1], PHP_EOL;
} finally { fclose($stream); }

1. Output: London, UK. The comma inside quotes belongs to one field; the temporary stream is closed even on failure.