weird problem in php

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Hi all ,

 I have using php 4.3.2 and mysql database.

 I have a form which have <select> tag which have the value for example 
"-New York".

 When use submit the form , i need to find the first occurence of "-" , 
i use strpos function as shown below :

$country = $_POST['country'];
$findme  = '-';
$pos = strpos($country, $findme);

if ($pos === false) {
      $_logger->logdebug("starting ....searchChassisTblDB() not found");
} else {
      $_logger->logdebug("starting ....searchChassisTblDB() found");
}

however it always give false . I did not know why.
Then i did a testing , added below code in the php file without form 
submission, it give true value which what i wanted. Anybody have ideas 
or suggestion what happening ? Any difference when value submitted from 
form ? Thanks

$mystring = '-New York';
$findme  = '-';
$pos = strpos($mystring, $findme);
if ($pos === false) {
   echo "The string '$findme' was not found in the string '$mystring'";
} else {
   echo "The string '$findme' was found in the string '$mystring'";
   echo " and exists at position $pos";
}

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