Unable to read PDF using PDF2Text after split by FPDI - php

Question

I am splitting PDF file and after split I want to read that split page text but that is returning me nothing. If I am reading before splitting is is working fine and returning me all PDF text but don't know why it is not working after splitting. Here is my code :-
<?php
function split_pdf($filename, $end_directory = false)
{
require_once('../fpdf/fpdf.php');
require_once('../fpdi/fpdi.php');
require_once('../pdf2text/class.pdf2text.php');
$end_directory = $end_directory ? $end_directory : './';
$new_path = preg_replace('/[\/]+/', '/', $end_directory.'/'.substr($filename, 0, strrpos($filename, '/')));
if (!is_dir($new_path))
{
// Will make directories under end directory that don't exist
// Provided that end directory exists and has the right permissions
mkdir($new_path, 0777, true);
}
$pdf = new FPDI();
$pagecount = $pdf->setSourceFile($filename); // How many pages?
// Split each page into a new PDF
for ($i = 1; $i <= $pagecount; $i++) {
$new_pdf = new FPDI();
$new_pdf->AddPage();
$new_pdf->setSourceFile($filename);
$new_pdf->useTemplate($new_pdf->importPage($i));
try {
$new_filename = $end_directory.str_replace('.pdf', '', $filename).'_'.$i.".pdf";
$new_pdf->Output($new_filename, "F");
echo "Page ".$i." split into ".$new_filename."<br />\n";
$pdf2text = new PDF2Text();
$pdf2text->setFilename($end_directory.$filename);
$pdf2text->decodePDF();
$text = $pdf2text->output();
echo "This is page text =====>> ".$text."<br><br>";
} catch (Exception $e) {
echo 'Caught exception: ', $e->getMessage(), "\n";
}
}
}
// Create and check permissions on end directory!
split_pdf("test.pdf", 'split/');
?>
Please help me I don't have any idea why is this happening?