只打印一次IF语句

下面是一个在我的电子商务网站（原型）中用于写入客户选择的项目并将其选择存储在平面文件数据库中的php文件。虽然echo "Order Submitted!;是针对每个选定的项目打印的，但逻辑工作正常。如果选择4个项目，则此行会打印4次，我只需要打印一次。任何想法如何实现？只打印一次IF语句

<body> 

    <table> 

     <?php 
     if (!($data = file('items.txt'))) { 
      echo 'ERROR: Failed to open file! </body></html>'; 
      exit; 
     } else { 
      echo "<h1>Transaction Completed!</h1>"; 
     } 
     date_default_timezone_set('Europe/London'); 
     $now = date(' d/m/y H:i:s '); 
     $visitor = $_POST['visitor']; 

     foreach ($_POST as $varname => $varvalue) { 
      foreach ($data as $thedata) { 
       list($partno, $name, $description, $price, $image) = explode('|', $thedata); 
       if ($partno == $varname) { 
        $myFile = "purchases.txt"; 
        $fh = fopen($myFile, 'a') or die("ERROR: Failed to open purchases file!\n"); 
        $content = $now . "|" . $visitor . "|" . $partno . "|" . $name . "|" . $price . "\n"; 

        if (!(fwrite($fh, $content))) { 
         echo "<p>ERROR: Cannot write to file($myFile)\n</p>"; 
         exit; 
        } else { 
         echo "<p>Order Submitted!</p>"; 
         fclose($fh); 
        } 
       } 
      } 
     } 
     ?> 

    </table> 

    <input type="button" onClick="parent.location='home.php'" value="Return Home"> 
    <input type="button" onClick="parent.location='items.php'" value="New Purchase">

如果2项选择的输出是：

事务已完成单被提交！已提交订单！

来源

2013-03-20 user2170008

* “平面文件数据库”* ...有使用平面文件数据库的电子商务网站？ – Kermit 2013-03-20 17:32:34

这是一个原型 – user2170008 2013-03-20 17:33:10

亲类型？...... – brbcoding 2013-03-20 17:33:33

记录是否有错误并移动循环外的其他部分。

$error=false; 
    foreach ($_POST as $varname => $varvalue) { 
     foreach ($data as $thedata) { 
      list($partno, $name, $description, $price, $image) = explode('|', $thedata); 
      if ($partno == $varname) { 
       $myFile = "purchases.txt"; 
       $fh = fopen($myFile, 'a') or die("ERROR: Failed to open purchases file!\n"); 
       $content = $now . "|" . $visitor . "|" . $partno . "|" . $name . "|" . $price . "\n"; 

       if (!(fwrite($fh, $content))) { 
        echo "<p>ERROR: Cannot write to file($myFile)\n</p>"; 
        $error=true; 
        exit; 
       } 
      } 
     } 
    } 
if(!$error) { 
    echo "<p>Order Submitted!</p>"; 
    fclose($fh); 
}

虽然，你有它编写的方式，你甚至不需要有条件周围“订单提交”，因为如果有一个错误，将不会执行。（由于退出）。

如果它没有更改，也可以将$ myfile移出循环。

第二个版本：

$myFile = "purchases.txt"; 
    foreach ($_POST as $varname => $varvalue) { 
     foreach ($data as $thedata) { 
      list($partno, $name, $description, $price, $image) = explode('|', $thedata); 
      if ($partno == $varname) { 
       $fh = fopen($myFile, 'a') or die("ERROR: Failed to open purchases file!\n"); 
       $content = $now . "|" . $visitor . "|" . $partno . "|" . $name . "|" . $price . "\n"; 

       if (!(fwrite($fh, $content))) { 
        echo "<p>ERROR: Cannot write to file($myFile)\n</p>"; 
        exit; 
       } 
      } 
     } 
    } 
    echo "<p>Order Submitted!</p>"; 
    fclose($fh);

来源

2013-03-20 17:36:25 mkaatman

前foreach循环：

$printed=false;

然后代替

else { 
    echo "<p>Order Submitted!</p>"; 
    fclose($fh); 
}

使用

else { 
    if(!$printed) 
    { 
     echo "<p>Order Submitted!</p>"; 
     $printed=true; 
    } 
    fclose($fh); 
}

来源

2013-03-20 17:36:43

您应该删除从else分支echo，并把它放在第一foreach右括号之后

来源

2013-03-20 17:36:49 Uby

您可以使用一个计数器，看看更多的一个提交

，如：

$count=0; 
foreach ($_POST as $varname => $varvalue) { 
      foreach ($data as $thedata) { 
       list($partno, $name, $description, $price, $image) = explode('|', $thedata); 
       if ($partno == $varname) { 
        $myFile = "purchases.txt"; 
        $fh = fopen($myFile, 'a') or die("ERROR: Failed to open purchases file!\n"); 
        $content = $now . "|" . $visitor . "|" . $partno . "|" . $name . "|" . $price . "\n"; 

        if (!(fwrite($fh, $content))) { 
         echo "<p>ERROR: Cannot write to file($myFile)\n</p>"; 
         exit; 
        } else { 
         $count++; 
         fclose($fh); 
        } 
       } 
      } 
     } 
    if ($count>0) 
     echo "<p>Order Submitted! $count Times</p>";

来源

2013-03-20 17:38:13

只打印一次IF语句

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