Verify eml DKIM

verify.php

<?php

function get_middle($source, $beginning, $ending, $init_pos) {
    $beginning_pos = strpos($source, $beginning, $init_pos);
    $middle_pos = $beginning_pos + strlen($beginning);
    $ending_pos = strpos($source, $ending, $beginning_pos + 1);
    $middle = substr($source, $middle_pos, $ending_pos - $middle_pos);
    return $middle;
}


$files = scandir('data/');
$byFrom = array();
foreach($files as $k => $file) {
    if ($file == '.' || $file == '..') {
        continue;
    }
    $fContent = file_get_contents('data/' . $file);

    echo $k . ' => ' . $file. PHP_EOL . "FROM:";
    $elements = imap_mime_header_decode(get_middle($fContent, 'From: ', '>', 0));
    for ($i=0; $i<count($elements); $i++) {
        $from = trim($elements[$i]->text);
        if (!empty($from)){
            echo " {$from} ";
        }
    }

    exec('/usr/local/share/python/dkimverify.py < data/' . $file, $res);
    $res = $res[0];
    echo $res . PHP_EOL;

    if (isset($byFrom[$from])) {
        $byFrom[$from][] = array($from, $file, $res);
    } else {
        $byFrom[$from] = array(array($from, $file, $res));
    }
}

print_r($byFrom);