handle and test CSV with SplFileObject via in-memory text data - source: https://twitter.com/FredBouchery/status/1276527123172384768

memoryCsv.php

<?php

class MemoryFile extends SplFileObject
{
    public function __construct(string $data)
    {
        parent::__construct('php://memory', 'w+');
        $this->fwrite($data);
        $this->seek(0);
    }
}

$file = new MemoryFile(
<<<FILE
id | name | value | date
1  | foo  | 123   | 2020-03-04
2  | bar  | asdf  | 2020-03-05
FILE
);
$file->setCsvControl('|');
$file->setFlags(SplFileObject::READ_CSV);

foreach ($file as $line) {
    var_dump($line);
}