Question

I m trying to make a general if for some variables that i have in my database. Let s say that we have the next variables and values:

$var1 = "abc";
$var2 = "n/a";
$var3 = "das";
$var4 = "n/a";

如果我的发言必须包含所有这些变量,即包含“n/a”的变量的核对,以及包含“n/a”的每个变数,则文字必须另加变式<代码>$var21 = “无可用”<>。这是可能的吗?

Answer 1

由于个人偏好,我不使用<代码>可变变量。如果你重新思考,you当然可以尝试。

I d create an extra hash instead. ~~This would remove the need for an if-statement as well~~. :)

$descriptions = array(
    "n/a" => "Not Available",
    "brb" => "Be Right Back",
    "iee" => "I m easily extendable"
);

那么,当你们需要某种特定关键案文时,你才可以采取某种形式。

$descriptive_text = $descriptions[$var1];

<>上>

如果在<代码>上没有价值,则将其放在正本上:

$descriptive_text = (is_null($descriptions[$var1])) ? $var1 : $descriptions[$var1];

Answer 2

You should use arrays for this.

$array = array("abc", "n/a", "das", "n/a");
foreach($array as $key => $value)
{
 if($value == "n/a")
 {
  echo "Do Something!";
 }
}