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up vote 0 down vote favorite

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function is_valid_isbn($isbn)
{
  $isbn_length  =  strlen($isbn);
  $isbn_sum     = 0;
  echo "this is the length :";
  echo $isbn_length;
  for($i=0; $i < $isbn_length; $i++) { $total += (substr($isbn, $i, 1) * (11-($i+1))); }
 return true;
 }

When i run this function i am getting following error can some one help me where is the err ??

Here is the error message
Parse error: parse error, expecting `';'' in C:\xampp\htdocs\gbload\application\libraries\Isbnconv.php on line 47

share|improve this question
1  
I'm assuming the <br> tags are not in your actual code? – James Skidmore Aug 14 '10 at 19:33
    
which one is line 47? – rabidmachine9 Aug 14 '10 at 19:34
    
yeah there are no br tags in the code and line 47 is for($i=0; $i < $isbn_length; $i++) { $total += (substr($isbn, $i, 1) * (11-($i+1))) – Sandeep Reddy Aug 14 '10 at 19:35
1  
Should there be a < sign on line 47 between the $i and $isbn_length variables? – Matt Huggins Aug 14 '10 at 19:39
    
yeah there was < symbol in the condition statment of the for loop it got missed while i have copy pasted the code here. – Sandeep Reddy Aug 14 '10 at 19:44
up vote 1 down vote

Next time, pls tell us where is the line 47. See the fixed code below:

function is_valid_isbn($isbn)
{


  $isbn_length  =  strlen($isbn); //no br here
  $isbn_sum     = 0;//no br here
  echo "this is the length :"; //same 
  echo $isbn_length;//same
  for($i=0; $i < $isbn_length; $i++) //wrong here, missing the operator <
  { 
          $total += substr($isbn, $i, 1) * (11-$i+1); //too many ( )
  }//no br here
  return true;
}
share|improve this answer
    
sorry that was my mistake while copy pasting.. my code was inded having the lessthan condition in the for loop for($i=0; $i < $isbn_length; $i++) { $total += (substr($isbn, $i, 1) * (11-($i+1))); } – Sandeep Reddy Aug 14 '10 at 19:40
    
So it must be wrong somewhere else? – Bang Dao Aug 14 '10 at 19:42
    
no the Error msg says there is some problem in the for loop line which is line numbe 47.. – Sandeep Reddy Aug 14 '10 at 19:43
    
There're no parse error on my php-apache-local, then let try another way.So pls do the following things: 1. check your file encoding, is that utf-8 or something like that. 2. check if the current file is Isbnconv.php 3.copy 100% exactly that file's content to here. After that, we can try to find what is the cause again. – Bang Dao Aug 14 '10 at 19:50
up vote 0 down vote 
for($i=0; $i$isbn_length; $i++)

maybe it should be: for($i=0; $i==$isbn_length; $i++) or something like that...

share|improve this answer
    
sorry that was my mistake while copy pasting the code it was having a lessthan symbol there for($i=0; $i < $isbn_length; $i++) { $total += (substr($isbn, $i, 1) * (11-($i+1))); } – Sandeep Reddy Aug 14 '10 at 19:42

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