full code for tv episode detection.php

<pre><?php

function array_insert($array,$pos,$val) {
    $array2 = array_splice($array,$pos);
    $array[] = $val;
    $array = array_merge($array,$array2);
   
    return $array;
}

class Episode {
	public $name = 0, $season = 0, $episode = 0;
	public function __construct ($name, $season, $episode) {
		$this->name = $name;
		$this->season = (int)$season;
		$this->episode = (int)$episode;
	}
	
	public function __toString () {
		return "Episode ".$this->episode. " named '". $this->name ."' of season ".$this->season."\n";
	}
}

function calcMostCommonDiff($orig, $files, $season) {
	$mismatches = array();
	$inRow = 0;
	$firstLength = strlen(reset($orig));
	$firstFile = reset($orig);

	foreach($files as $file) {
		$inRow = 0;
		
		for($i = 0; $i < $firstLength; $i++) {
			$thisChar = $firstFile{$i};
			
			if($i >= strlen($file)) continue;
			$otherChar = $file{$i};
			
			if($thisChar != $otherChar && is_numeric($thisChar) && is_numeric($otherChar)) {
				$inRow++;
				$mismatches[] = $i;
				
				if($inRow === 3) {
					$removeStart = count($mismatches);
					unset($mismatches[$removeStart - 1]);
					unset($mismatches[$removeStart - 2]);
					unset($mismatches[$removeStart - 3]);
					break;
				}
			}
			else {
				$inRow = 0;
			}
		}
	}
			
	$count = array();
	$len = count($mismatches);
	foreach($mismatches as $match) {
		$count[$match]++;
	}
	arsort($count);
	$count = array_slice(array_keys($count), 0, 2);
	
	list($pos1, $pos2) = $count;
	$ePos = ($pos1 > $pos2 ? $pos1 : $pos2);
	
	$complete_array = array_insert($files, reset(array_keys($orig)), reset($orig));
	foreach($complete_array as $file) {
		$parts = explode('.', $file);
		$extension = array_pop($parts);
		$reconstructed = implode('.', $parts);
		$frontRemoved = ltrim(substr($reconstructed, $ePos+1), ' .,-[]_');
		$backRemoved = preg_replace("/(\[[a-z0-9]+\])/", "", $frontRemoved);
		$names[] = trim($backRemoved);
	}
	
	foreach($complete_array as $key => $value) {
		$objects[] = new Episode($names[$key], $season, substr($value, (int)$count[1], ($count[0]-$count[1])+1));
	}
	
	return array($count, $mismatches, $names, $objects);
}

$paths = array(
	'D:\Video\The Simpsons\The Simpsons Season 01',
	'D:\Video\The Simpsons\The Simpsons Season 07',
	'D:\Video\The Simpsons\The Simpsons Season 14',
	'D:\Video\The Simpsons\The Simpsons Season 18',
	'D:\Video\Family Guy\Season 6',
	'D:\Video\Avatar The Last Airbender\Book 3 - Fire'
);

$rawFiles = glob($paths[5].'\*.*');
unset($files);
foreach($rawFiles as $file) {
	$files[] = basename($file);
}

for($i = 0; $i < strlen($files[0]); $i++) {
	echo " ".$files[0]{$i}." ";
}
echo "\n";
foreach(range(0,strlen($files[0])-1) as $val) {
	echo sprintf("%02d ",$val);
}
echo "\n\n";

list($count, $mismatches, $names, $objects) = calcMostCommonDiff(array(0 => $files[0]), array_slice($files, 1), 3);
list($count2, $mismatches2) = calcMostCommonDiff(array(1 => $files[1]), array_merge(array($files[0]), array_slice($files, 2)), 3);

if($count == $count2) {
	//$keys = array_keys($count);
	echo $count[1] . " (tens place) and " . $count[0] . " (ones place) are episode positions.\n\n";
	foreach($objects as $v) {
		echo $v;
	}
}
else {
	var_dump($count, $count2, $mismatches, $mismatches2);
}
?></pre>