blocks|key|146273|text|不，这段代码不会工作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|146274|if+(($tstat&&$l1stat&&$l2stat&&$l3stat)=='no_prices')
{
++++//do+something
}|code-block|syntax|javascript|146275|为什么？因为括号中的条件将检查结果本身-您正在将布尔值与字符串进行比较。所以在伪代码中，这就是你的代码：|146276|if+(+($tstat+is+true,+$l1stat+is+true,+$l2stat+is+true,+$l3stat+is+true)+==+'no_prices'+)
+++++%5E+++++++++++++++++++++++++whole+thing+returns+true++++++++++++++++%5E++++%5E+++true++%5E|146277|如果您不想实现这一点，可以使用count()和array_unique()|offset|length|style|CODE|146278|if+($tstat+==+'no_prices'+&&+count(array_unique(array($tstat,+$l1stat,+$l2stat,+$l3stat)))+==+1)|146279|entityMap^0|0|0|0|0|F|7|N|E|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|W|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|Y|8|@$M|Z|N|10|O|P]|$M|11|N|12|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|D|7|13|8|@]|9|@]|A|$E|F]]|$1|S|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|T|$]]

No, this code won't work:

<pre><code>if (($tstat&amp;&amp;$l1stat&amp;&amp;$l2stat&amp;&amp;$l3stat)=='no_prices')
{
 //do something
}
</code></pre>

Why? Because condition in parentheses, will check result itself - You are comparing boolean to string. So in pseudo-code, thats what your code looks like:

<pre><code>if ( ($tstat is true, $l1stat is true, $l2stat is true, $l3stat is true) == 'no_prices' )
 ^ whole thing returns true ^ ^ true ^
</code></pre>

If you wan't to achieve this, you can use <code>count()</code> and <code>array_unique()</code>:

<pre><code>if ($tstat == 'no_prices' &amp;&amp; count(array_unique(array($tstat, $l1stat, $l2stat, $l3stat))) == 1)
</code></pre>

blocks|key|4652929|text|除非我弄错了，否则没有本机的方法可以做到这一点。如果这是您必须经常检查的内容，请尝试对其使用自定义函数，例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4652930|function+allEquals($chkstr,+$vals)+{
++++if+(!is_array($vals))+{+die('allEquals()+$vals+not+an+array');+}
++++foreach+($vals+AS+$v)+{
++++++++if+($chkstr+!=+$v)+{+return+false;+}
++++}
++++return+true;
}|code-block|syntax|javascript|4652931|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Unless I'm mistaken, there's no native way of doing this. If this is something that you have to check for often, try using a custom function for it, e.g.:

<pre><code>function allEquals($chkstr, $vals) {
 if (!is_array($vals)) { die('allEquals() $vals not an array'); }
 foreach ($vals AS $v) {
 if ($chkstr != $v) { return false; }
 }
 return true;
}
</code></pre>

blocks|key|146321|text|在您的情况下，您可以执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|146322|if+(count(array_unique($tstat,+$l1stat,+$l2stat,+$l3stat))+==+1+//Check+if+all+share+the+same+value+(i.e.,+number+of+unique+values+is+1
&&+$tstat+==+'no_prices'))+//If+everything+is+the+same+and+$stat+==+'no_prices',+then+everything+is+'no_prices'
{

}|code-block|syntax|javascript|146323|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

In your case you can do:

<pre><code>if (count(array_unique($tstat, $l1stat, $l2stat, $l3stat)) == 1 //Check if all share the same value (i.e., number of unique values is 1
&amp;&amp; $tstat == 'no_prices')) //If everything is the same and $stat == 'no_prices', then everything is 'no_prices'
{

}
</code></pre>

blocks|key|4652974|text|<?php
$tstat+=+$l1stat+=+$l2stat+=+$l3stat+=+'no_prices';
$testVars+=+array($tstat,$l1stat,$l2stat,$l3stat);

if(count(array_filter($testVars,+function($x)+{+return+$x+===+'no_prices';+}))+==+count($testVars))
{
++++++++print("Correct");
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4652975|使用带有匿名回调的array_filter，检查其长度是否大于原始数组，即传递的所有条件。|unstyled|4652976|或者如果长度大于零，即传递了任何一个条件|4652977|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|L|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|F|7|N|8|@]|9|@]|A|$]]]|J|$]]

<pre><code>&lt;?php
$tstat = $l1stat = $l2stat = $l3stat = 'no_prices';
$testVars = array($tstat,$l1stat,$l2stat,$l3stat);

if(count(array_filter($testVars, function($x) { return $x === 'no_prices'; })) == count($testVars))
{
 print("Correct");
}
</code></pre>

Use array_filter with a anonymous callback, and check if its length is greater is equal to original array i.e. all conditions passed,

or if length is greater than zero i.e. any one condition passed

blocks|key|146358|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|146359|$arr+=+array($tstat,$l1stat,...);+//make+an+array
$arr+=array_unique($arr);//unique+this+array

if(count($arr)+==+1+&&+$arr[0]+=+'no_prices'){+//+check+if+only+one+array+element+have+with+same+value
++++echo+"got+it";
}|code-block|syntax|javascript|146360|demo+example|offset|length|146361|entityMap|0|LINK|mutability|MUTABLE|url|https://eval.in/108039^0|0|0|0|C|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

try this:

<pre><code>$arr = array($tstat,$l1stat,...); //make an array
$arr =array_unique($arr);//unique this array

if(count($arr) == 1 &amp;&amp; $arr[0] = 'no_prices'){ // check if only one array element have with same value
 echo "got it";
}
</code></pre>

<a href="https://eval.in/108039" rel="nofollow">demo example</a>

blocks|key|146390|text|答案是“不”。没有对给定条件的简写，它将使您的代码更具可读性，这应该是您的首要任务。不过，您可以改进它：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|146391|define('MYAPP_NO_PRICES',+'no_prices');

if+($tstat+===+MYAPP_NO_PRICES
++++++++&&+$l1stat+===+MYAPP_NO_PRICES
++++++++&&+$l2stat+===+MYAPP_NO_PRICES
++++++++&&+$l3stat+===+MYAPP_NO_PRICES)+{+++++++++++++++++++++++++++++++++
++++//+do+something
}|code-block|syntax|javascript|146392|让所有这些变量单独检查是一种代码味道；您可能希望重新考虑这种设计，这样就不必这样做了。|146393|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

The answer is "no". There's no shorthand to the given condition that will make your code more readable, which should be your top priority. You can improve it though:

<pre><code>define('MYAPP_NO_PRICES', 'no_prices');

if ($tstat === MYAPP_NO_PRICES
 &amp;&amp; $l1stat === MYAPP_NO_PRICES
 &amp;&amp; $l2stat === MYAPP_NO_PRICES
 &amp;&amp; $l3stat === MYAPP_NO_PRICES) { 
 // do something
}
</code></pre>

Having all these vars to check individually is a code smell; you might want to rethink this design so you never have to do this.

Is there a shorthand way of writing the code below?

<pre><code>if (($tstat=='no_prices')&amp;&amp;($l1stat=='no_prices')&amp;&amp;($l2stat=='no_prices')&amp;&amp;($l3stat=='no_prices'))
{ 
 //do something
}
</code></pre>

I tried using the below code,but it did something when one of the variables was not equal to 'no_prices'. 

<pre><code>if (($tstat &amp;&amp; $l1stat &amp;&amp; $l2stat &amp;&amp; $l3stat)=='no_prices')
{
 //do something
}
</code></pre>

To check that the strings weren't causing problems I tried substituting 0 for 'no_prices' and 1 for other values, but the result was the same.

What is a shorthand way for checking that multiple variables are ALL equal to the same value in an IF statement? (PHP)

有没有一种简写的方式来写下面的代码？if (($tstat=='no_prices')&&($l1stat=='no_prices')&&($l2stat=='no_prices')&&($l3stat=='no_prices')){                                       //do...

问在IF语句中检查多个变量是否都等于相同值的快捷方法是什么？(PHP)
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