php code for palindrom

@jhamskee17Aug 27.2006

php script is new for me, can anyone help me about this palindrome thing in php… please please please…

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@jhamskee17authorAug 27.2006 — #i'm just a beginner in php. can any one help me with this palindrome thing using php script... thank you!

@LiLcRaZyFuZzYAug 27.2006 — #which palindrome thing?!

@pcthugAug 27.2006 — #Exactly, which palindrome thing?! To me a palindrome is any Word, string, etc. that is exactly the same read in either direction. Nothing to do with PHP

@LiLcRaZyFuZzYAug 28.2006 — #well "PHP" is a palindrome :p ?

@pcthugAug 28.2006 — #well "PHP" is a palindrome :p ?[/QUOTE]
hahaha ? ? ?

@LiLcRaZyFuZzYAug 28.2006 — #hi LiLcRaZyFuZzY... i have this assignment from my professor, i dont know how to do it... it states that

"Make a program using any control structure statement that validate if

a word type by a user is a Palindrome or not. ( words when read backwards

will be the same ) . example aha, madam, eye

output :

Enter a word :

aha

aha is a palindrome !!!

Enter a word :

make

make is not a Palindrome ."

PLEASE HELP ME...[/QUOTE]

post here if you have questions about the following code:

[code=php]
 <?php
 function is_palindrome($string){
 if(!empty($string) && isset($string) && is_string($string)){
 if(strlen($string) > 2){
 if(strlen($string) % 2 == 1){
 # string has a center
 $strlen_first_half = floor(strlen($string) / 2);
 
   $center = $strlen_first_half; # strings start counting at 0
 
   $str_first_half = substr($string, 0, $strlen_first_half);
   $str_second_half = substr($string, -$strlen_first_half);
 
   $str_center = $string{$center}; 
 
   if(strrev($str_second_half) == $str_first_half){
   echo "<span style='font-weight: bold;'>'$string'</span> is a palindrome<br>";
   echo ">  ".$str_first_half."<span style='color: red; font-weight:bold;'>".$str_center."</span>".$str_second_half;
   }else{
   echo "<span style='font-weight: bold;'>'$string'</span> is not a palindrome<br>";
   }
   }else{
   # string is dividable by 2
   $strlen_first_half = strlen($string) / 2;
 
   $str_first_half = substr($string, 0, $strlen_first_half);
   $str_second_half = substr($string, -$strlen_first_half);
 
   if(strrev($str_second_half) == $str_first_half){
   echo "<span style='font-weight: bold;'>'$string'</span> is a palindrome (With an even string length and no central letter)<br>";
   echo ">  ".$str_first_half."|".$str_second_half;
   }else{
   echo "<span style='font-weight: bold;'>'$string'</span> is not a palindrome<br>";
   }
   }
   }else{
   die("String length must be higher than 2");
   }
  }else{
   die("Enter a string");
  }
 }
 
 is_palindrome("madam");
 ?>
 [/code]

@sridhar_423Aug 28.2006 — #

[code=php]function is_palindrome($string){ 
 if(!empty($string) && isset($string) && is_string($string)){ 
 if(strrev($string) == $string)
 echo "Yes.. Its Palindrome";
 else
 echo "No.. not Palindrome";
 }
 [/code]

@sridhar_423Aug 28.2006 — #Sorry.. missed out a closing brace

[code=php]function is_palindrome($string){ 
 if(!empty($string) && isset($string) && is_string($string)){ 
 if(strrev($string) == $string) 
 echo "Yes.. Its Palindrome"; 
 else 
 echo "No.. not Palindrome"; 
 }
 }[/code]

php code for palindrom

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