blocks|key|4697821|text|是的。然而，这应该提示您代码最有可能存在的另一个问题(+Phpstorm不能明确警告这个问题)：除了如何使用include和require之外，您还过度使用全局变量。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4697822|你可以通过更多地模块化你的代码，例如通过带参数的making+use+of+functions，轻松地改进这里。此外，您可以考虑(但在PHP中不需要)开始使用对象编写类和程序。|4697823|对于PHPStorm本身，您可以排除带有注释的单个或多个语句，以在某些地方禁用警告。然而，如果你有许多“假阳性”，这是很麻烦的。顺便说一句。适用于任何检查警告。|4697824|另请参阅：|4697825|4697826|Suppressing+Inspections+(PHPStorm+Webhelp)|unordered-list-item|4697827|phpstorm+warning+php+variable+might+not+have+been+defined|4697828|4697829|entityMap|0|LINK|mutability|MUTABLE|url|http://php.net/language.functions|1|http://www.jetbrains.com/phpstorm/webhelp/suppressing-inspections.html|2|https://stackoverflow.com/questions/11751330/phpstorm-warning-php-variable-might-not-have-been-defined^0|1I|7|1Q|7|0|O|N|0|0|0|0|0|0|16|1|0|0|1L|2|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@$9|15|A|16|B|C]|$9|17|A|18|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|19|8|@]|D|@$9|1A|A|1B|1|1C]]|E|$]]|$1|H|3|I|5|6|7|1D|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|1E|8|@]|D|@]|E|$]]|$1|L|3|-4|5|6|7|1F|8|@]|D|@]|E|$]]|$1|M|3|N|5|O|7|1G|8|@]|D|@$9|1H|A|1I|1|1J]]|E|$]]|$1|P|3|Q|5|O|7|1K|8|@]|D|@$9|1L|A|1M|1|1N]]|E|$]]|$1|R|3|-4|5|6|7|1O|8|@]|D|@]|E|$]]|$1|S|3|-4|5|6|7|1P|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z]]|10|$5|V|W|X|E|$Y|11]]|12|$5|V|W|X|E|$Y|13]]]]

Yes it is. However, this should hint you to another issue your code most likely has (and which Phpstorm can not warn specifically about): You exploit the usage of global variables too much in addition to how you use <code>include</code> and <code>require</code>.

You can easily improve here by modularizing your code more, e.g. by <a href="http://php.net/language.functions" rel="noreferrer">making use of functions</a> with parameters. Additionally you can consider (but you don't need to in PHP) to start writing classes and program with objects.

For PHPStorm itself, you can exclude single or multiple statements with annotations to disable the warning in certain places. However if you have many "false positives", this is cumbersome. This btw. works with any inspection warning.

See as well:

<ul>
<li><a href="http://www.jetbrains.com/phpstorm/webhelp/suppressing-inspections.html" rel="noreferrer">Suppressing Inspections (PHPStorm Webhelp)</a></li>
<li><a href="https://stackoverflow.com/questions/11751330/phpstorm-warning-php-variable-might-not-have-been-defined">phpstorm warning php variable might not have been defined</a> </li>
</ul>

blocks|key|3113|text|正如hakre所指出的，这个警告可能是一个坏的代码气味的信号。但是，如果之前存在include+require+或调用，则可以禁用PHPStorm对未定义变量的检查。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|CODE|entityRanges|data|3114|取消选中Settings/Editor/Inspections/PHP/Undefined+variable中名为"Ignore+'include‘and+'require’statements“的单选按钮。|3115|​|3116|📷|atomic|3117|3118|如果您不想禁用此检查，可以使用PHPStorm的@noinspection+annotation为单语句禁用它。示例代码：|3119|require+$path;+//+$some_variable+is+defined+in+that+file
/**+@noinspection+PhpUndefinedVariableInspection+*/
$config["DBSettings"]+=+[
++++"server"+=>+$some_variable
];|code-block|syntax|javascript|3120|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/66a624616196042d18855d1c168eb385.png|imageAlt|1|LINK|MUTABLE|url|https://www.jetbrains.com/phpstorm/help/suppressing-inspections.html^0|14|7|1C|7|1K|R|14|7|1C|7|0|0|2W|0|0|1|0|0|1|0|1|0|0|0|1|0|0|1G|O|O|1|0|0^^$0|@$1|2|3|4|5|6|7|19|8|@$9|1A|A|1B|B|C]|$9|1C|A|1D|B|C]|$9|1E|A|1F|B|C]|$9|1G|A|1H|B|D]|$9|1I|A|1J|B|D]]|E|@]|F|$]]|$1|G|3|H|5|6|7|1K|8|@$9|1L|A|1M|B|C]]|E|@]|F|$]]|$1|I|3|J|5|6|7|1N|8|@$9|1O|A|1P|B|C]]|E|@]|F|$]]|$1|K|3|L|5|M|7|1Q|8|@$9|1R|A|1S|B|C]]|E|@$9|1T|A|1U|1|1V]]|F|$]]|$1|N|3|J|5|6|7|1W|8|@$9|1X|A|1Y|B|C]]|E|@]|F|$]]|$1|O|3|P|5|6|7|1Z|8|@$9|20|A|21|B|C]]|E|@$9|22|A|23|1|24]]|F|$]]|$1|Q|3|R|5|S|7|25|8|@]|E|@]|F|$T|U]]|$1|V|3|-4|5|6|7|26|8|@]|E|@]|F|$]]]|W|$X|$5|Y|Z|10|F|$11|12|13|-4]]|14|$5|15|Z|16|F|$17|18]]]]

As hakre pointed out, this warning could be a sign of bad code smell. However, you can disable PHPStorm's inspection of undefined variables if there is a prior <code>include</code> or <code>require</code> call.

Uncheck the radio button in Settings/Editor/Inspections/PHP/Undefined variable called "Ignore 'include' and 'require' statements". 

<a href="https://i.stack.imgur.com/2qIcv.png" rel="noreferrer"><img src="https://i.stack.imgur.com/2qIcv.png" alt="enter image description here"></a>

If you don't want to disable this inspection, you can disable it for a single statement by using PHPStorm's <a href="https://www.jetbrains.com/phpstorm/help/suppressing-inspections.html" rel="noreferrer">@noinspection annotation</a>. Example code: 

<pre><code>require $path; // $some_variable is defined in that file
/** @noinspection PhpUndefinedVariableInspection */
$config["DBSettings"] = [
 "server" =&gt; $some_variable
];
</code></pre>

blocks|key|3125|text|通过不仅在我的函数的顶部使用global+$db，而且在其他文件的顶部使用它，phpstorm以某种方式找出了在哪里可以找到该变量的声明和/**+@var语句。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3126|entityMap^0|E|A|1X|8|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

By using <code>global $db</code> not just at the top of my function, but also atop of other files, phpstorm somehow figures out where to find the declaration and the <code>/** @var</code> statement of that var.

blocks|key|3155|text|就我个人而言，我只是降低了警告的严重性，然后无论您是否有先前的include/require语句，它都将适用。Settings>>Editor>>Inspections>>PHP>>Undefined>>highlight+'Undefined+variable'，然后使用下拉菜单调整'Severity‘。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3156|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Personally, I'd just reduce the severity of the warning, which will then apply regardless of whether you have a prior include/require statement or not. Settings>>Editor>>Inspections>>PHP>>Undefined>>[highlight 'Undefined variable'], then adjust 'Severity' using the dropdown menu.

blocks|key|4697925|text|以上所有答案都删除或抑制了imho不是很好的解决方案的警告。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4697926|最好的解决方案是使用变量添加带有doc块的header。|4697927|示例：|4697928|<?php
/**
+*+@var+string+$name
+*+@var+FormData+$form
+*/
?>|code-block|syntax|javascript|4697929|这不仅可以防止显示“未定义的变量”警告，还可以记录您的代码并使自动完成功能按预期工作。|4697930|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Q|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|R|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

All above answers removes or suppress warnings which imho is not good solution. 

Best solution is to add header with doc block with used variables.

Example:

<pre><code>&lt;?php
/**
 * @var string $name
 * @var FormData $form
 */
?&gt;
</code></pre>

This will not only prevent from showing "Undefined variable" warning, but also document your code and makes autocomplete working as expected.

blocks|key|4697949|text|启用“在当前文件之外搜索变量的定义”|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4697950|​|4697951|📷|atomic|offset|length|4697952|4697953|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/b8a83c03ce72c83fa39b011e42aa945e.png|imageAlt^0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@$G|V|H|W|1|X]]|A|$]]|$1|I|3|C|5|6|7|Y|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|K|$L|$5|M|N|O|A|$P|Q|R|-4]]]]

Enable &quot;Search for variable's defination outside the current file&quot;
<a href="https://i.stack.imgur.com/Q4HIz.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Q4HIz.png" alt="enter image description here" /></a>

PHPStorm showed that all the variables from other files, both required and included, are undefined. I found this solution <a href="https://stackoverflow.com/questions/11751330/phpstorm-warning-php-variable-might-not-have-been-defined">here</a>, but after I disabled that option <code>Ignore 'include' and 'require' statements</code>, the IDE ignored all undefined variables. 

For example, I have a file <code>a.php</code> with content <code>$name = 'Bob'</code>, and file <code>b.php</code>, which require the file <code>a.php</code>. When I type <code>echo $name</code> in file <code>b.php</code> it works as expected and displays <code>'Bob'</code>. The IDE, however, highlights the variable <code>$name</code> claiming it's undefined. If I disable that option <code>'Undefined variable' - Ignore 'include' and 'require' statements</code>, the IDE stops highlighting it. 

With that option I can now write any variables, for example <code>$sdadasdasdas</code> in file <code>b.php</code> and the IDE doesn't highlight it. 

Can PHPStorm understand which variables are set in included/required files and which ones are not?

PHPStorm: undefined variables caused by include/require

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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PHPStorm显示，来自其他文件的所有变量，无论是必需的还是包含的，都是未定义的。我找到了这个解决方案，但在我禁用该选项Ignore 'include' and 'require' statements之后，集成开发环境忽略了所有未定义的变量。例如，我有一个包含content $name = 'Bob'的文件a.ph...

问PHPStorm:由include/require引起的未定义变量
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问PHPStorm:由include/require引起的未定义变量EN