php字符串在不应该[关闭]时回显为0

问题描述：

I'm writing code to show the prices of some products. If the price is 0 it doesn't show anything.

<? if ($book->price_euro != 0) {$europrice = number_format($book->price_eur, 2); echo "€$europrice";}?>
<? if ($book->price_gbp != 0) {$gbpprice = number_format($book->price_gbp, 2); echo "£$gbpprice";}?>
<? if ($book->price_usd != 0) {$usdprice = number_format($book->price_usd, 2); echo "$$usdprice";}?>

This echoes "€0.00 £33.00 $66.00 ". The € price is set to 99. I can see no reason whatsoever that this should echo as 0! Am I doing something wrong? Bad syntax?

我正在编写代码来显示某些产品的价格。如果价格为0，则不显示任何内容。 p>

 ＆lt;？  if（$ book-＆gt; price_euro！= 0）{$ europrice = number_format（$ book-＆gt; price_eur，2）;  echo“€$ europrice”;}？＆gt; 
＆lt;？  if（$ book-＆gt; price_gbp！= 0）{$ gbpprice = number_format（$ book-＆gt; price_gbp，2）;  echo“£$ gbpprice”;}？＆gt; 
＆lt;？  if（$ book-＆gt; price_usd！= 0）{$ usdprice = number_format（$ book-＆gt; price_usd，2）;  echo“$$ usdprice”;}？＆gt; 
  code>  pre> 
 
 这回响“€0.00£33.00 $ 66.00”。  €价格设置为99.我认为没有任何理由认为这应该为0！ 难道我做错了什么？ 语法错误？ p> 
  div>

答

$europrice = number_format($book->price_eur, 2

shouldn't it be $book->price_euro ?

答

Typo in Euro

number_format($book->price_eur, 2); // This is what you have.

number_format($book->price_euro, 2); // This is what you need.

答

I don't see anything wrong with this code without seeing more. But maybe your variable?

<? if ($book->price_euro != 0) {$europrice = number_format($book->price_eur, 2); echo "€$europrice";}?>

price_eur should be price_euro?

答

You might still be getting null values or something else try using empty instead

<? if (empty($book->price_euro)) {$europrice = number_format($book->price_euro, 2); echo "€$europrice";}?>
<? if (empty($book->price_gbp)) {$gbpprice = number_format($book->price_gbp, 2); echo "£$gbpprice";}?>
<? if (empty($book->price_usd)) {$usdprice = number_format($book->price_usd, 2); echo "$$usdprice";}?>

答

number_format($book->price_eur, 2);

should be

number_format($book->price_euro, 2);

The null value is causing your problem.

php字符串在不应该[关闭]时回显为0

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