Easily merge .csv files which have an header

mergecsv.php

<?php

$options = array();
$arguments = array();

array_shift( $argv );

foreach ( $argv as $arg )
{
    if ( $arg[0] == '-' )
    {
        $options[] = substr( $arg, 1 );
    }
    else
    {
        $arguments[] = $arg;
    }
}

$header = false;

foreach ( $arguments as $file )
{
    $firstLine = true;

    foreach ( file( $file ) as $line )
    {
        if ( $firstLine )
        {
            $firstLine = false;

            if ( $header )
            {
                continue;
            }
            else
            {
                $header = true;
            }
        }

        echo $line;
    }
}