blocks|key|430750|text|这怎么回事？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|430751|if+(
++++(
++++++++!+empty($post['email_notify_subject'])+&&
++++++++empty($post['email_notify_date'])+&&
++++++++empty($post['email_notify_emails'])
++++)+%7C%7C
++++(
++++++++empty($post['email_notify_subject'])+&&
++++++++!+empty($post['email_notify_date'])+&&
++++++++empty($post['email_notify_emails'])
++++)+%7C%7C
++++(
++++++++empty($post['email_notify_subject'])+&&
++++++++empty($post['email_notify_date'])+&&
++++++++!+empty($post['email_notify_emails'])
++++)
)+{
++++//+only+1+field+filled+out
}|code-block|syntax|javascript|430752|或者还有另一种方法：|430753|$num_filled_out+=+0;
if+(+!+empty($post['email_notify_subject'])+)+$num_filled_out%2B%2B;
if+(+!+empty($post['email_notify_date'])+)+$num_filled_out%2B%2B;
if+(+!+empty($post['email_notify_emails'])+$num_filled_out%2B%2B;
if+($num_filled_out+<=+1)+{
++++//+1+or+0+filled+out
}|430754|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

How is this?

<pre><code>if (
 (
 ! empty($post['email_notify_subject']) &amp;&amp;
 empty($post['email_notify_date']) &amp;&amp;
 empty($post['email_notify_emails'])
 ) ||
 (
 empty($post['email_notify_subject']) &amp;&amp;
 ! empty($post['email_notify_date']) &amp;&amp;
 empty($post['email_notify_emails'])
 ) ||
 (
 empty($post['email_notify_subject']) &amp;&amp;
 empty($post['email_notify_date']) &amp;&amp;
 ! empty($post['email_notify_emails'])
 )
) {
 // only 1 field filled out
}
</code></pre>

Or here's another way:

<pre><code>$num_filled_out = 0;
if ( ! empty($post['email_notify_subject']) ) $num_filled_out++;
if ( ! empty($post['email_notify_date']) ) $num_filled_out++;
if ( ! empty($post['email_notify_emails']) $num_filled_out++;
if ($num_filled_out &lt;= 1) {
 // 1 or 0 filled out
}
</code></pre>

blocks|key|339207|text|没有对此进行测试，但是尝试一下：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|339208|<?php
++if(empty(array(
++++$_post['email_notify_subject'],
++++$_post['email_notify_date'],
++++$_post['email_notify_emails']))){
++++++echo+"All+Three+filed+required";+//or+other+instructions
}
++else{
+++//Proceed+with+the+form
}|code-block|syntax|javascript|339209|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|$]]

Not Tested this , but give it a try:

<pre><code>&lt;?php
 if(empty(array(
 $_post['email_notify_subject'],
 $_post['email_notify_date'],
 $_post['email_notify_emails']))){
 echo "All Three filed required"; //or other instructions
}
 else{
 //Proceed with the form
}
</code></pre>

blocks|key|2212978|text|这将是一种更好的方法，因为您可以在一个数组中检查所有要检查的字段和所有相应的错误消息。而且，它的可伸缩性更强。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2212979|请注意，您必须测试表单method属性是否设置为post，并且为输入字段指定了正确的名称。|offset|length|style|CODE|2212980|$data_to_check+=+array(
++++'email_notify_subject'=>array(
++++++++'error'=>'Enter+Notify+Subject'
++++),
++++'email_notify_date'=>array(
++++++++'error'=>'Enter+Notify+Date'
++++),
++++'email_notify_emails'=>array(
++++++++'error'=>'Enter+Notify+Emails'
++++),
);

$errors+=+array();

foreach($data_to_check+as+$key+=>+$value)+{
++++if+(empty($post[$key]))+{
++++++++$errors[]+=+$value['error'];
++++}
}

if+(!empty($errors))+{
++++foreach($errors+as+$key+=>+$value)+{
++++++++echo+'<p+class="error">'.$value.'';
++++}
}|code-block|syntax|javascript|2212981|entityMap^0|0|B|6|O|4|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@$D|Q|E|R|F|G]|$D|S|E|T|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|U|8|@]|9|@]|A|$K|L]]|$1|M|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|N|$]]

This would be a better approach because you can have all your fields you want to check and all the according error messages in one array. Also it's more scalable. 

Note that you have to test if your form <code>method</code> attribute is set to <code>post</code> and you have given the right names to your input fields.

<pre><code>$data_to_check = array(
 'email_notify_subject'=&gt;array(
 'error'=&gt;'Enter Notify Subject'
 ),
 'email_notify_date'=&gt;array(
 'error'=&gt;'Enter Notify Date'
 ),
 'email_notify_emails'=&gt;array(
 'error'=&gt;'Enter Notify Emails'
 ),
);

$errors = array();

foreach($data_to_check as $key =&gt; $value) {
 if (empty($post[$key])) {
 $errors[] = $value['error'];
 }
}

if (!empty($errors)) {
 foreach($errors as $key =&gt; $value) {
 echo '&lt;p class="error"&gt;'.$value.'&lt;/p&gt;';
 }
}
</code></pre>

blocks|key|339250|text|如果您只关心最后的错误，请参阅以下参考：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|339251|$post['email_notify_subject']+++=+array();++//+same+(==+not+===)+as+null
$post['email_notify_date']++++++=+null;+++++//+same+(==+not+===)+as+empty+array
$post['email_notify_emails']++++=+'test+string';

$errors['email_notify_subject']+++=+'Enter+Notify+Subject';
$errors['email_notify_date']++++++=+'Enter+Notify+Date';
$errors['email_notify_emails']++++=+'Enter+Notify+Emails';

foreach+($post+as+$key+=>+$data)+{

++++if+(!empty($data))+{

++++++++unset($errors[$key]);+//+if+$post+data+not+empty,+unset+error+msg
++++}
}

var_dump($errors);+//+test+dump+$errors|code-block|syntax|javascript|339252|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|$]]

If you only care about errors at the end, see the following as reference:

<pre><code>$post['email_notify_subject'] = array(); // same (== not ===) as null
$post['email_notify_date'] = null; // same (== not ===) as empty array
$post['email_notify_emails'] = 'test string';

$errors['email_notify_subject'] = 'Enter Notify Subject';
$errors['email_notify_date'] = 'Enter Notify Date';
$errors['email_notify_emails'] = 'Enter Notify Emails';

foreach ($post as $key =&gt; $data) {

 if (!empty($data)) {

 unset($errors[$key]); // if $post data not empty, unset error msg
 }
}

var_dump($errors); // test dump $errors
</code></pre>

I'm trying to validate 3 fields that are related. These 3 fields are in a form that has a couple dozen fields already, many of which are being validated. 

For the 3 related fields in question, I need to write code that checks if 1 of any of the 3 are populated, and then throws an error if any of the other 2 are not. 

<ul>
<li>So if A is populated and B and C are not = error.</li>
<li>If B is populated and A and C are not = error.</li>
<li>if C is populated and A and B are not = error. 

And then so on with two being populated and the third, not. </li>
</ul>

Like: if A and B are populated and C is not = error. 

Here's where I started, but not sure if this is correct validation:

<pre><code>if(!empty($post['email_notify_subject']) 

 &amp;&amp; empty($post['email_notify_date']) 
 &amp;&amp; empty($post['email_notify_emails']))

{

$errors['email_notify_date'] = 'Enter Notify Date'; 
$errors['email_notify_emails'] = 'Enter Notify Emails';

} 

else if (empty($post['email_notify_subject']) 

 &amp;&amp; !empty($post['email_notify_date']) 
 &amp;&amp; empty($post['email_notify_emails'])) 

{

$errors['email_notify_subject'] = 'Enter Notify Subject';
$errors['email_notify_emails'] = 'Enter Notify Emails';

} 

else if (empty($post['email_notify_subject']) 

 &amp;&amp; empty($post['email_notify_date']) 
 &amp;&amp; !empty($post['email_notify_emails'])) 

{

$errors['email_notify_subject'] = 'Enter Notify Subject';
$errors['email_notify_date'] = 'Enter Notify Date';

}
</code></pre>

PHP validation - check if 1 of 3 fields is populated

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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我试图验证三个相关的字段。这3个字段的形式已经有几十个字段，其中许多字段正在验证。对于所讨论的3个相关字段，我需要编写代码，检查其中的一个字段是否已填充，如果其他两个字段中的任何一个未填充，则抛出一个错误。因此，如果A被填充，而B和C不是= error。如果B被填充，而A和C不= error。如果填充了C，而A和B不=...

问PHP验证-检查是否填充了3个字段中的一个
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