A simple tool to split csv files in many smaller files

textfilesplit.php

<?php

if ($argc < 2) {
    die ('Use textsplit.php /path/do/arquivo linhas');
}

if (!isset($argv[2])) {
    $argv[2] = 1000;
}

list ($file, $filename, $lines) = $argv;

if (!file_exists($filename)) {
    die ('Arquivo de destino não encontrado');
}

if (!is_numeric($lines) || $lines < 0) {
    die ('Linhas deve ser numerico');
}

$file = fopen($filename, 'r');

$outputFilename = explode('.', basename($filename));

$workedLines = 0;
$fileID = 0;

while (false !== $line = fgets($file) ) {
    file_put_contents($outputFilename[0] . "_{$fileID}." . $outputFilename[1], $line, FILE_APPEND);

    if (++$workedLines % $lines == 0) {
        $fileID++;
    }
}

fclose($file);

echo "DONE" . PHP_EOL;