Method to take a string and print all palindromes. Returns the longest or if none found throws an error.

gistfile1.php

<?php

function palindrome($string) {	
	$string = strtolower(ereg_replace("[^A-Za-z0-9]", "", $string ));
	$palindromes = array();
	$longest = "";
	$word = "";
	$length = strlen($string);

	for ($i =0; $i <= $length; $i++) {
		$word = $string[$i];
		for ($j = $i + 1; $j <= $length - 1; $j++) {
			$word .= $string[$j];
			if ($word == strrev($word)) {
				print ("$word <br/>");
				if (strlen($word) > strlen($longest)) {
					$longest = $word;
				}
			}
		}
		$word = "";
	}

	if ($longest != "") {
		return $longest;
	} else {
		throw new Exception("Error no palindrome's in given string");
	}
}


$string = "A Toyota's a Toyota. ajdskafhdasjfh ak asdf asfd 
Able was I ere I saw Elba. asfasf saf afdasfa fkdkre
Acrobats stab orca. asldkfjrndd
Aerate pet area. afkdsfljnreng
Ah, Satan sees Natasha! afskanglgele
Aibohphobia (fear of palindromes)
Air an aria. asfsafasfas  aaf a fds 
Al lets Della call Ed Stella. asfa  gfafa dsf afd
alula asfafsad fdf
Amen icy cinema. afd adf dsafsafd
Amore, Roma. safasaf d
Amy, must I jujitsu my ma? asf sadfdsf
Anaa  asdfa sd fa sf
Animal loots foliated detail of stool lamina.
Anna sfsdfds fsdf
Anne, I vote more cars race Rome to Vienna.
Are Mac ‘n’ Oliver ever evil on camera?
Are we not drawn onward to new era?
Are we not drawn onward, we few, drawn onward to new era?
 r gsdgfsdfg Are we not pure? “No sir!” Panama’s moody Noriega brags. “It is garbage!” Irony dooms a man; a prisoner up to new era. sdgdfsg sf sf
Art, name no tub time. Emit but one mantra. asf fdsa ff safsaf
As I pee, sir, I see Pisa! asfsffawefef efggthlfdlkd
Avid diva.";

echo "Org: $string<br/>";

try {
	$longest = palindrome($string);
} catch (Exception $e) {
	echo "error:" . $e->getMessage();
}

echo "Longest: $longest";