View difference between Paste ID: <a href="/85e2SE9U">85e2SE9U</a> and <a href="/post/view"></a>

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function checkjpeg($filename) { 
	$filesize = filesize($filename);
	$fres = fopen($filename,"r");
	if ($fres == false) { return false;}
	$fstart = bin2hex(fread($fres,2));
	fseek($fres, $filesize-2);
	$fend = bin2hex(fread($fres,2));
	fclose($fres);	
	if ($fstart == "ffd8" && $fend == "ffd9") {
		return true;
	} else {
		return false;
	}

}

function checkpng($filename) { 
	$filesize = filesize($filename);
	$fres = fopen($filename,"r");
	if ($fres == false) { return false;}
	$fstart = bin2hex(fread($fres,8));
	fclose($fres);	
	if ($fstart == "89504e470d0a1a0a") {
		return true;
	} else {
		return false;
	}

}


function checkgif($filename) { 
	$filesize = filesize($filename);
	$fres = fopen($filename,"r");
	if ($fres == false) { return false;}
	$fstart = bin2hex(fread($fres,6));
	fclose($fres);
	
	if ($fstart == "474946383961" || $fstart == "474946383761") {
		return true;
	} else {
		return false;
	}
}

1	-
1	+	function checkjpeg($filename) {
2		$filesize = filesize($filename);
3		$fres = fopen($filename,"r");
4		if ($fres == false) { return false;}
5		$fstart = bin2hex(fread($fres,2));
6		fseek($fres, $filesize-2);
7		$fend = bin2hex(fread($fres,2));
8		fclose($fres);
9		if ($fstart == "ffd8" && $fend == "ffd9") {
10		return true;
11		} else {
12		return false;
13		}
14
15		}
16
17		function checkpng($filename) {
18		$filesize = filesize($filename);
19		$fres = fopen($filename,"r");
20		if ($fres == false) { return false;}
21		$fstart = bin2hex(fread($fres,8));
22		fclose($fres);
23		if ($fstart == "89504e470d0a1a0a") {
24		return true;
25		} else {
26		return false;
27		}
28
29		}
30
31
32		function checkgif($filename) {
33		$filesize = filesize($filename);
34		$fres = fopen($filename,"r");
35		if ($fres == false) { return false;}
36		$fstart = bin2hex(fread($fres,6));
37		fclose($fres);
38
39		if ($fstart == "474946383961" \|\| $fstart == "474946383761") {
40		return true;
41		} else {
42		return false;
43		}
44		}