syntax problem php
Please, i trying to pass son information when php code to the ecart summary, but i get this error, can you help me? Thanks
<?php
$Clave = "53ZD9C1V";
$MerchantID = "081506214";
$AcquirerBIN = "0000554026";
$TerminalID = "00000003";
$Num_operacion=$_POST['number'];
$Importe=$_POST['final'];
$Referencia = "";
$Tipomoneda = "978";
$Exponente = "2";
$URL_OK = "http://www.lafecorunesa.com/pedido-aprovado.php?clienteID=$_SESSION['clienteID']";
$URL_NOK = "http://www.lafecorunesa.com/pedido-cancelado.php?clienteID=$_SESSION['clienteID']";
$string = $Clave.$MerchantID.$AcquirerBIN.$TerminalID.$Num_operacion.$Importe.$Tipomoneda.$Exponente."SHA1".$URL_OK.$URL_NOK;
$resultado = sha1($string);
?>