$sql ="EXEC Sp_DetalleObservacion 1,'$sfinicio','$sffin','$szona','$sagencia','$stipoobservacion','$sproducto','' ";
$params = array('$t1','$t2','$t3','$t4','$t5','$t6','$t7','$t8');
$result = sqlsrv_query($conn, $sql, $params);
if(!$result){
echo "Ocurrio un error en la consulta";
}else{
$tabla ="<table class='table table-bordered text-center'>";
$tabla .="<thead>";
$tabla .= "<tr>";
$i = 0;
while ($data = sqlsrv_fetch_array($result,SQLSRV_FETCH_ASSOC)) {
if ($i == 0) {
foreach($data as $key => $value) {