getNumPagesInPDF

gistfile1.php

<?php
echo getNumPagesInPDF('iOS-zhangchao.pdf');
function getNumPagesInPDF($PDFPath)
{
	$stream = @fopen($PDFPath, "r");
	$PDFContent = @fread ($stream, filesize($PDFPath));
	if(!$stream || !$PDFContent)
	    return false;
	$firstValue = 0;
	$secondValue = 0;
	if(preg_match("/\/N\s+([0-9]+)/", $PDFContent, $matches)) {
	    $firstValue = $matches[1];
	}
	if(preg_match_all("/\/Count\s+([0-9]+)/s", $PDFContent, $matches))
	{
	    $secondValue = max($matches[1]);
	}
	echo (($secondValue != 0) ? $secondValue : max($firstValue, $secondValue));
}