function palindrome($number, $newNumber, $len)
{
if ($len <= 0) {
return $newNumber;
}
$newNumber .= $number % 10;
$number = floor($number / 10);
return palindrome($number, $newNumber, $len - 1);
}
function palindrome($num)
{
//~ echo '**'.$num.'&&';
$returnVal = 0;
$initialVal = $num;
$reverseVal = implode('', array_reverse(str_split($num)));
$add = $initialVal + $reverseVal;
if ($add == implode('', array_reverse(str_split($add)))) {
$returnVal = $add;
} else {
$returnVal = palindrome($add);
}
if (!empty($returnVal)) {
return $returnVal;
}
}
function palindrome($num, $no_iteration = 0)
{
$returnVal = array();
$no_iteration = $no_iteration + 1;
$initialVal = $num;
$reverseVal = implode('', array_reverse(str_split($num)));
if ($initialVal != $reverseVal) {
$add = $initialVal + $reverseVal;
if ($add == implode('', array_reverse(str_split($add)))) {
$returnVal = array($add, $no_iteration);
} else {
$returnVal = palindrome($add, $no_iteration);
}
} else {
$returnVal = array($initialVal, 0);
}
if (!empty($returnVal)) {
return $returnVal;
}
}
echo closeToZero($aNum) . " \n";
echo "\n \n";
break;
case 'ugly':
// Ugly numbers
echo "Ugly numbers : \n";
getUglyNum($aNum);
//echo "\n \n";
break;
case 'palindrome':
// Palindrome
echo "Palindrome numbers : \n";
echo "Iterations Palindrome Number\n";
foreach ($aNum as $num) {
if ($num > 0) {
$opt = palindrome($num);
if (!empty($opt)) {
echo $opt[1] . " \t\t " . $opt[0] . "\n";
}
}
}
echo "\n \n";
break;
case 'closetozero':
echo "Closest To Zero : \n";
echo closeToZero($aNum);
echo "\n \n";
break;
case 'word.txt':
echo "Word Chain : \n";
wordChain($aText);
//compare arrays
if ($first_half == $reverse_second_half) {
echo "{$string} is a palindrome!";
} else {
echo "{$string} is not a palindrome!";
}
} else {
//build first array
for ($i = 0; $i < ($length - 1) / 2; $i++) {
$first_half[] = $string[$i];
}
//build second array
for ($i = $length - 1; $i >= ($length + 1) / 2; $i--) {
$reverse_second_half[] = $string[$i];
}
//compare arrays
if ($first_half == $reverse_second_half) {
echo "{$string} is a palindrome!";
} else {
echo "{$string} is not a palindrome!";
}
}
}
palindrome("saas");
echo "<br />";
palindrome("asdf");
echo "<br />";
palindrome("saaas");
echo "<br />";
palindrome("asdfj");
echo "<br />";
$flag = false;
break;
} else {
if ($i == $l || $l - $i == 1) {
break;
}
}
$i++;
}
if ($flag) {
echo "Palabra palíndrome";
} else {
echo "Palabra no palíndrome";
}
}
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>Palabras pa...</title>
</head>
<body>
<?php
palindrome($_POST["word"]);
?>
</body>
</html>
<?php
function palindrome($x)
{
if (empty($x)) {
return false;
}
$l = strlen($x) - 1;
$i = 0;
while ($i < $l) {
if ($x[$i] === $x[$l]) {
$i++;
$l--;
continue;
} else {
return false;
}
}
return true;
}
echo palindrome('radar');
<?php
$inputFile = fopen("polindrome.txt", "r") or die("Unable to open file!");
$data = array();
while (!feof($inputFile)) {
$data[] = fgets($inputFile);
}
fclose($inputFile);
for ($i = 1; $i < count($data); $i++) {
echo palindrome(trim($data[$i]));
}
function palindrome($word)
{
$len = strlen($word);
$until = $len / 2 - 1;
$is_pal = true;
for ($i = 0; $i < $until; ++$i) {
if ($word[$i] != $word[$len - $i - 1]) {
$is_pal = false;
if ($word[$len - $i - 1] == $word[$i + 1] && $word[$len - $i - 2] == $word[$i + 2]) {
echo $i;
break;
} else {
if ($word[$i] == $word[$len - $i - 2] && $word[$i + 1] == $word[$len - $i - 3]) {
echo $len - $i - 1;
break;
}
}
}
}
if ($is_pal) {
