<form method=POST action='' name=form1>
<input type=text name=t1 class='form-control' value='$t1' >
<input type=submit value='Check String'>
</form>
<?Php
$t1=$_POST['t1']; // Using POST method of a FORM
//$t1='madam'; // String variable with data for testing
if(strlen($t1) >0){
if($t1==strrev($t1)){ // change this line for case insensitive
echo "<i>$t1</i> is a Palindrome ";
}else{
echo "<i>$t1</i> is NOT a Palindrome ";
}
}else{echo "Enter any string"; }
?>
if(strtolower($t1)==strtolower(strrev($t1))){
<?php
$t1='racecar'; // sample string, change this data
$length=strlen($t1); // length of the string
$t1_reverse=''; // to hold the revesed string
for($i=$length-1;$i>=0;$i--){
$t1_reverse .=$t1[$i];
}
if($t1_reverse==$t1){
echo "<i>$t1</i> is a Palindrome ";
}else{
echo "<i>$t1</i> is NOT a Palindrome ";
}
?>
<?php
$t1=$t2=1234321; // keeping in two variables
$t1_reverse=0;
while($t1>0){
$d=$t1%10; // reminder of division
$t1_reverse = $t1_reverse * 10 + $d;
$t1=floor($t1/10); // floor value
}
//echo $t1_reverse;
if($t1_reverse==$t2){
echo "<i>$t2</i> is a Palindrome ";
}else{
echo "<i>$t2</i> is NOT a Palindrome ";
}
?>
Output
1234321 is a Palindrome
Introduction to PHPPrinting output by ECHO command