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Current File : /data/web/virtuals/51568/virtual/www/www/ucebnice/zapujcka-zapis.php

<?php
if (session_id() == '') { session_start(); }
 $user_id = $_SESSION["user_id"];
if (!isset($pdo)){
  if (file_exists("class/pdoDB.class.php")) {require "class/pdoDB.class.php";}
  else {require "../../class/pdoDB.class.php";}
 $pdo = new pdoDB();
}
$x = (isset($_POST["zapujcka"])) ? $_POST["zapujcka"] : "";
$zapujcka = json_decode($x);
if ($zapujcka->id > 0){

} else {
  $sql = "INSERT INTO `skl_zapujcky`(`idkniha`, `datum`, `pocet`, `typzapujcil`, `idzapujcil`, `iduser`) 
    VALUES (:idkniha, :datum, :pocet, :typzapujcil, :idzapujcil, :iduser)";
  $pdo->execute($sql, Array(':idkniha' => $zapujcka->idkniha, ':datum' => $zapujcka->datum, ':pocet' => $zapujcka->pocet, 
    ':typzapujcil' => $zapujcka->typzapujcil, ':idzapujcil' => $zapujcka->idzapujcil, ':iduser' => $user_id));
}
  $sql = "SELECT sum(skl_zapujcky.pocet) as zapujceno ,sum(skl_vraceni.pocetvraceno) as vraceno
from skl_zapujcky 
left join skl_vraceni on skl_vraceni.idzapujcky=skl_zapujcky.id
where skl_zapujcky.idkniha=:idkniha";
  $pocty = $pdo->queryOne($sql, Array(':idkniha' => $zapujcka->idkniha));
  $zapujceno = ((empty($pocty->zapujceno)) ? 0 : $pocty->zapujceno);
  $vraceno = ((empty($pocty->vraceno)) ? 0 : $pocty->vraceno);
  echo $zapujceno-$vraceno;
?>