blocks|key|649808|text|您有一些逻辑错误，问题是您的代码“编译”(如“在语法上是正确的”)，但这肯定不是您想要做的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|649809|649810|==是一个比较运算符，您想要使用赋值运算符=|unordered-list-item|offset|length|style|CODE|649811|:用于python代码块，在php中要使用大括号{+...+}来定义代码块(例如else代码块)|649812|。|649813|所以你的代码是：|649814|if+($disuzun1+==+'a'+%7C%7C+$disuzun1+==+'b'+%7C%7C+$disuzun1+==+'c'){+
++++$disadet+=+2+*+$demiradet;
}+else+{
++++$disadet+=+$demiradet;
}|code-block|syntax|javascript|649815|我会把它写成：|649816|$disadet+=+$demiradet;+//+assign+the+default+value+(no+else+required)
if+($disuzun1+==+'a'+%7C%7C+$disuzun1+==+'b'+%7C%7C+$disuzun1+==+'c'){+
++++$disadet+=+2+*+$demiradet;
}|649817|或者，包括Ivan86的答案来做易于维护的“数组中”查找：|649818|$disadet+=+$demiradet;+//+assign+the+default+value+(no+else+required)
if+(in_array($disuzun1,+['a',+'b',+'c'])){+
++++$disadet+=+2+*+$demiradet;
}|649819|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/users/8202589/ivan86^0|0|0|0|2|L|1|0|0|1|O|7|14|4|0|0|0|0|0|0|5|6|0|0|0^^$0|@$1|2|3|4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|1C|8|@$F|1D|G|1E|H|I]|$F|1F|G|1G|H|I]]|9|@]|A|$]]|$1|J|3|K|5|E|7|1H|8|@$F|1I|G|1J|H|I]|$F|1K|G|1L|H|I]|$F|1M|G|1N|H|I]]|9|@]|A|$]]|$1|L|3|M|5|6|7|1O|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1P|8|@]|9|@]|A|$]]|$1|P|3|Q|5|R|7|1Q|8|@]|9|@]|A|$S|T]]|$1|U|3|V|5|6|7|1R|8|@]|9|@]|A|$]]|$1|W|3|X|5|R|7|1S|8|@]|9|@]|A|$S|T]]|$1|Y|3|Z|5|6|7|1T|8|@]|9|@$F|1U|G|1V|1|1W]]|A|$]]|$1|10|3|11|5|R|7|1X|8|@]|9|@]|A|$S|T]]|$1|12|3|-4|5|6|7|1Y|8|@]|9|@]|A|$]]]|13|$14|$5|15|16|17|A|$18|19]]]]

You have some logical errors, the problem is that your code &quot;compiles&quot; as in &quot;is syntactically correct&quot; but it's certainly not what you intended to do.
<ul>
<li><code>==</code> is a comparison operator, you want to use the assignment operator <code>=</code></li>
<li><code>:</code> is used in python code blocks, in php you want to use braces <code>{ ... }</code> to define code blocks (such as an <code>else</code> code block)</li>
</ul>
So your code would be:
<pre><code>if ($disuzun1 == 'a' || $disuzun1 == 'b' || $disuzun1 == 'c'){ 
 $disadet = 2 * $demiradet;
} else {
 $disadet = $demiradet;
}
</code></pre>
I would actually write this as:
<pre><code>$disadet = $demiradet; // assign the default value (no else required)
if ($disuzun1 == 'a' || $disuzun1 == 'b' || $disuzun1 == 'c'){ 
 $disadet = 2 * $demiradet;
}
</code></pre>
Or, including <a href="https://stackoverflow.com/users/8202589/ivan86">Ivan86</a>'s answer to do easily maintainable &quot;is-in-array&quot; lookups:
<pre><code>$disadet = $demiradet; // assign the default value (no else required)
if (in_array($disuzun1, ['a', 'b', 'c'])){ 
 $disadet = 2 * $demiradet;
}
</code></pre>

blocks|key|1496458|text|您可以像这样简化代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1496459|if+(in_array($disuzun1,+['a',+'b',+'c']))+{
++++$disadet+=+2*$demiradet;
}+else+{
++++$disadet+=+$demiradet;
}|code-block|syntax|javascript|1496460|此外，当将值赋值给变量时，您应该使用赋值运算符=，而不是比较运算符==。|offset|length|style|CODE|1496461|entityMap^0|0|0|N|1|X|2|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@$I|R|J|S|K|L]|$I|T|J|U|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

You can simplify your code like this:
<pre><code>if (in_array($disuzun1, ['a', 'b', 'c'])) {
 $disadet = 2*$demiradet;
} else {
 $disadet = $demiradet;
}
</code></pre>
Also, when assigning a value to a variable you should use the assignment operator <code>=</code> and not the comparison operator <code>==</code>.

I am new to PHP. I have a simple API written in PHP which receives the data in JSON. I am converting the JSON into a PHP array and parsing it:
<pre><code>$obj = json_decode($json,true);

$demircap = $obj['demircap'];
$disuzun1 = $obj['disuzun1'];
$boy = $obj['boy'];
$demiradet = $obj['demiradet'];
</code></pre>
I would like to define a new empty object (<code>$disadet</code>) here and set a conditional state of the <code>$demiradet</code> object. If it has a special String value, I would like to give my new object <code>$disadet</code> as the double value of <code>$demiradet</code>, such that if <code>$disuzun1 == 'a'</code> , <code>$disadet == $demiradet*2</code>.
This is my code:
<pre><code>if ($disuzun1 == 'a' || $disuzun1 == 'b' || $disuzun1 == 'c'){
 $disadet == 2*$demiradet;
}else:
 $disadet == $demiradet;
</code></pre>
How can I do this conditional formatting with PHP?
Thanks.

How to conditionally assign an object in PHP?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我是PHP新手。我有一个用PHP编写的简单API，它用JSON接收数据。我正在将JSON转换为PHP数组并解析它：$obj = json_decode($json,true);$demircap = $obj['demircap'];$disuzun1 = $obj['disuzun1'];$boy = $obj['b...

问如何在PHP中有条件地分配对象？
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问如何在PHP中有条件地分配对象？EN