blocks|key|3124053|text|$text+=+preg_replace('!/\*.*?\*/!s',+'',+$text);
$text+=+preg_replace('/\n\s*\n/',+"\n",+$text);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3124054|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>$text = preg_replace('!/\*.*?\*/!s', '', $text);
$text = preg_replace('/\n\s*\n/', "\n", $text);
</code></pre>

blocks|key|347073|text|请记住，如果要解析的文件有一个字符串包含符合这些条件的内容，则使用的任何正则表达式都将失败。例如，它将如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|347074|print+"/*+a+comment+*/";|code-block|syntax|javascript|347075|如下所示：|347076|print+"";|347077|这可能不是你想要的。但也许是这样，我不知道。无论如何，正则表达式在技术上不能以某种方式解析数据来避免这个问题。我说是技术上的，因为现代的PCRE正则表达式已经添加了大量的hack，使它们都能够做到这一点，更重要的是，不再是正则表达式，而是其他任何东西。如果您希望避免在引号内或在其他情况下剥离这些东西，那么没有什么可以替代成熟的解析器(尽管它仍然可以非常简单)。|347078|entityMap^0|0|0|0|0|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]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

Keep in mind that any regex you use will fail if the file you're parsing has a string containing something that matches these conditions. For example, it would turn this:

<pre><code>print "/* a comment */";
</code></pre>

Into this:

<pre><code>print "";
</code></pre>

Which is probably not what you want. But maybe it is, I don't know. Anyway, regexes technically can't parse data in a manner to avoid that problem. I say technically because modern PCRE regexes have tacked on a number of hacks to make them both capable of doing this and, more importantly, no longer regular expressions, but whatever. If you want to avoid stripping these things inside quotes or in other situations, there is no substitute for a full-blown parser (albeit it can still be pretty simple).

blocks|key|350676|text|//++Removes+multi-line+comments+and+does+not+create
//++a+blank+line,+also+treats+white+spaces/tabs+
$text+=+preg_replace('!%5E[+\t]*/\*.*?\*/[+\t]*[\r\n]!s',+'',+$text);

//++Removes+single+line+'//'+comments,+treats+blank+characters
$text+=+preg_replace('![+\t]*//.*[+\t]*[\r\n]!',+'',+$text);

//++Strip+blank+lines
$text+=+preg_replace("/(%5E[\r\n]*%7C[\r\n]%2B)[\s\t]*[\r\n]%2B/",+"\n",+$text);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|350677|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>// Removes multi-line comments and does not create
// a blank line, also treats white spaces/tabs 
$text = preg_replace('!^[ \t]*/\*.*?\*/[ \t]*[\r\n]!s', '', $text);

// Removes single line '//' comments, treats blank characters
$text = preg_replace('![ \t]*//.*[ \t]*[\r\n]!', '', $text);

// Strip blank lines
$text = preg_replace("/(^[\r\n]*|[\r\n]+)[\s\t]*[\r\n]+/", "\n", $text);
</code></pre>

blocks|key|3337063|text|$string+=+preg_replace('#/\*[%5E*]*\*%2B([%5E/][%5E*]*\*%2B)*/#',+'',+$string);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3337064|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>$string = preg_replace('#/\*[^*]*\*+([^/][^*]*\*+)*/#', '', $string);
</code></pre>

blocks|key|3124092|text|这是可能的，但我不会这么做。您需要解析整个php文件，以确保您没有删除任何必要的空格(字符串、关键字/标识符之间的空格(publicfuntiondoStuff())等)。最好使用PHP的tokenizer+extension。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|3124093|entityMap|0|LINK|mutability|MUTABLE|url|http://us.php.net/manual/en/function.token-get-all.php^0|2M|J|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

It is possible, but I wouldn't do it. You need to parse the whole php file to make sure that you're not removing any necessary whitespace (strings, whitespace beween keywords/identifiers (publicfuntiondoStuff()), etc). Better use the <a href="http://us.php.net/manual/en/function.token-get-all.php" rel="nofollow noreferrer">tokenizer extension</a> of PHP.

blocks|key|347091|text|这应该适用于将所有/*替换为*/。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|347092|$string+=+preg_replace('/(\s%2B)\/\*([%5E\/]*)\*\/(\s%2B)/s',+"\n",+$string);|code-block|syntax|javascript|347093|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|$]]

This should work in replacing all /* to */.

<pre><code>$string = preg_replace('/(\s+)\/\*([^\/]*)\*\/(\s+)/s', "\n", $string);
</code></pre>

blocks|key|345708|text|这是一个很好的函数，而且很有效！|type|unstyled|depth|inlineStyleRanges|entityRanges|data|345709|<?
if+(!defined('T_ML_COMMENT'))+{
+++define('T_ML_COMMENT',+T_COMMENT);
}+else+{
+++define('T_DOC_COMMENT',+T_ML_COMMENT);
}
function+strip_comments($source)+{
++++$tokens+=+token_get_all($source);
++++$ret+=+"";
++++foreach+($tokens+as+$token)+{
+++++++if+(is_string($token))+{
++++++++++$ret.=+$token;
+++++++}+else+{
++++++++++list($id,+$text)+=+$token;

++++++++++switch+($id)+{+
+++++++++++++case+T_COMMENT:+
+++++++++++++case+T_ML_COMMENT:+//+we've+defined+this
+++++++++++++case+T_DOC_COMMENT:+//+and+this
++++++++++++++++break;

+++++++++++++default:
++++++++++++++++$ret.=+$text;
++++++++++++++++break;
++++++++++}
+++++++}
++++}++++
++++return+trim(str_replace(array('<?','?>'),array('',''),$ret));
}
?>|code-block|syntax|javascript|345710|现在使用这个函数'strip_comments‘来传递包含在某些变量中的代码：|345711|<?
$code+=+"
<?php+
++++/*+this+is+comment+*/
+++//+this+is+also+a+comment
+++#+me+too,+am+also+comment
+++echo+"And+I+am+some+code...";
?>";

$code+=+strip_comments($code);

echo+htmlspecialchars($code);
?>|345712|将结果输出为|345713|<?
echo+"And+I+am+some+code...";
?>|345714|从php文件加载：|345715|<?
$code+=+file_get_contents("some_code_file.php");
$code+=+strip_comments($code);

echo+htmlspecialchars($code);
?>|345716|加载php文件，剥离注释并保存回来|345717|<?
$file+=+"some_code_file.php"
$code+=+file_get_contents($file);
$code+=+strip_comments($code);

$f+=+fopen($file,"w");
fwrite($f,$code);
fclose($f);
?>|345718|来源：http://www.php.net/manual/en/tokenizer.examples.php|offset|length|345719|entityMap|0|LINK|mutability|MUTABLE|url|http://www.php.net/manual/en/tokenizer.examples.php^0|0|0|0|0|0|0|0|0|0|0|3|1F|0|0^^$0|@$1|2|3|4|5|6|7|18|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|19|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1A|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|1B|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|1C|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|1D|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|1E|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|1F|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|1G|8|@]|9|@]|A|$]]|$1|U|3|V|5|D|7|1H|8|@]|9|@]|A|$E|F]]|$1|W|3|X|5|6|7|1I|8|@]|9|@$Y|1J|Z|1K|1|1L]]|A|$]]|$1|10|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]]|11|$12|$5|13|14|15|A|$16|17]]]]

This is a good function, and WORKS!

<pre><code>&lt;?
if (!defined('T_ML_COMMENT')) {
 define('T_ML_COMMENT', T_COMMENT);
} else {
 define('T_DOC_COMMENT', T_ML_COMMENT);
}
function strip_comments($source) {
 $tokens = token_get_all($source);
 $ret = "";
 foreach ($tokens as $token) {
 if (is_string($token)) {
 $ret.= $token;
 } else {
 list($id, $text) = $token;

 switch ($id) { 
 case T_COMMENT: 
 case T_ML_COMMENT: // we've defined this
 case T_DOC_COMMENT: // and this
 break;

 default:
 $ret.= $text;
 break;
 }
 }
 } 
 return trim(str_replace(array('&lt;?','?&gt;'),array('',''),$ret));
}
?&gt;
</code></pre>

Now using this function 'strip_comments' for passing code contained in some variable:

<pre><code>&lt;?
$code = "
&lt;?php 
 /* this is comment */
 // this is also a comment
 # me too, am also comment
 echo "And I am some code...";
?&gt;";

$code = strip_comments($code);

echo htmlspecialchars($code);
?&gt;
</code></pre>

Will result output as 

<pre><code>&lt;?
echo "And I am some code...";
?&gt;
</code></pre>

Loading from a php file:

<pre><code>&lt;?
$code = file_get_contents("some_code_file.php");
$code = strip_comments($code);

echo htmlspecialchars($code);
?&gt;
</code></pre>

Loading a php file, stripping comments and saving it back

<pre><code>&lt;?
$file = "some_code_file.php"
$code = file_get_contents($file);
$code = strip_comments($code);

$f = fopen($file,"w");
fwrite($f,$code);
fclose($f);
?&gt;
</code></pre>

Source: <a href="http://www.php.net/manual/en/tokenizer.examples.php" rel="nofollow">http://www.php.net/manual/en/tokenizer.examples.php</a>

blocks|key|3124125|text|这是我的解决方案，如果不习惯regexp的话。以下代码删除所有由#分隔的注释，并检索此样式NAME=VALUE中的变量的值|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3124126|++$reg+=+array();
++$handle+=+@fopen("/etc/chilli/config",+"r");
++if+($handle)+{
+++while+(($buffer+=+fgets($handle,+4096))+!==+false)+{
++++$start+=+strpos($buffer,"#")+;
++++$end+++=+strpos($buffer,"\n");
+++++//+echo+$start.",".$end;
+++++++//+echo+$buffer+." ";



+++++if+($start+!==+false)

++++++++$res+=+substr($buffer,0,$start);
++++else
++++++++$res+=+$buffer;+
++++++++$a+=+explode("=",$res);

++++++++if+(count($a)>0)
++++++++{
++++++++++++if+(count($a)+==+1+&&+!empty($a[0])+&&+trim($a[0])!="")
++++++++++++++++$reg[+$a[0]+]+=+"";
++++++++++++else
++++++++++++{
++++++++++++++++if+(!empty($a[0])+&&+trim($a[0])!="")
++++++++++++++++++++$reg[+$a[0]+]+=+$a[1];
++++++++++++}
++++++++}




++++}

++++if+(!feof($handle))+{
++++++++echo+"Error:+unexpected+fgets()+fail\n";
++++}
++++fclose($handle);
}|code-block|syntax|javascript|3124127|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|$]]

This is my solution , if one is not used to regexp. The following code remove all comment delimited by # and retrieves the values of variable in this style NAME=VALUE

<pre><code> $reg = array();
 $handle = @fopen("/etc/chilli/config", "r");
 if ($handle) {
 while (($buffer = fgets($handle, 4096)) !== false) {
 $start = strpos($buffer,"#") ;
 $end = strpos($buffer,"\n");
 // echo $start.",".$end;
 // echo $buffer ."&lt;br&gt;";



 if ($start !== false)

 $res = substr($buffer,0,$start);
 else
 $res = $buffer; 
 $a = explode("=",$res);

 if (count($a)&gt;0)
 {
 if (count($a) == 1 &amp;&amp; !empty($a[0]) &amp;&amp; trim($a[0])!="")
 $reg[ $a[0] ] = "";
 else
 {
 if (!empty($a[0]) &amp;&amp; trim($a[0])!="")
 $reg[ $a[0] ] = $a[1];
 }
 }




 }

 if (!feof($handle)) {
 echo "Error: unexpected fgets() fail\n";
 }
 fclose($handle);
}
</code></pre>

blocks|key|347147|text|我发现这个更适合我，(\s%2B)\/\*([%5E\/]*)\*/\n*它删除了多行、制表符或非制表符的注释以及后面的空格。我将留下一个注释示例，该正则表达式将匹配该示例。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|347148|/**
+*+The+AdditionalCategory
+*+Meta+informations+extracted+from+the+WSDL
+*+-+minOccurs+:+0
+*+-+nillable+:+true
+*+@var+TestStructAdditionalCategorizationExternalIntegrationCUDListDataContract
+*/|code-block|syntax|javascript|347149|entityMap^0|A|N|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

I found this one to suit me better, <code>(\s+)\/\*([^\/]*)\*/\n*</code> it removes multi-line, tabbed or not comments and the spaced behind it. I'll leave a comment example which this regex would match.

<pre><code>/**
 * The AdditionalCategory
 * Meta informations extracted from the WSDL
 * - minOccurs : 0
 * - nillable : true
 * @var TestStructAdditionalCategorizationExternalIntegrationCUDListDataContract
 */
</code></pre>

I want to parse a file and I want to use php and regex to strip:

<ul>
<li>blank or empty lines</li>
<li>single line comments</li>
<li>multi line comments</li>
</ul>

basically I want to remove any line containing 

<pre><code>/* text */ 
</code></pre>

or multi line comments

<pre><code>/***
some
text
*****/
</code></pre>

If possible, another regex to check if the line is empty (Remove blank lines)

Is that possible? can somebody post to me a regex that does just that?

Thanks a lot.

Regex to strip comments and multi-line comments and empty lines

我想要解析一个文件，我想使用php和regex来剥离：空白或空行单行注释多行注释基本上我想删除任何包含以下内容的行/* text */ 或多行注释/***sometext*****/如果可能，使用另一个正则表达式检查该行是否为空(删除空行)这有可能吗？有没有人能给我发一个正则表达式呢？非常感谢。

问Regex用于剥离注释、多行注释和空行
EN

回答 9

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问Regex用于剥离注释、多行注释和空行EN

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问Regex用于剥离注释、多行注释和空行
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