blocks|key|748645|text|您要寻找的正则表达式是|type|unstyled|depth|inlineStyleRanges|entityRanges|data|748646|%5E[a-z+A-Z0-9\/\\.'"]%2B$|code-block|syntax|javascript|748647|记住，如果使用PHP，则需要使用\来转义反斜杠和封装字符串的引号。|748648|在使用preg_match的PHP中，它应该如下所示：|748649|preg_match("/%5E[a-z+A-Z0-9\\/\\\\.'\"]%2B$/",$value);|748650|这是查找您可能想要使用的正则表达式的好地方。http://regexpal.com/|offset|length|748651|entityMap|0|LINK|mutability|MUTABLE|url|http://regexpal.com/^0|0|0|0|0|0|M|K|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|11|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|12|8|@]|9|@]|A|$E|F]]|$1|M|3|N|5|6|7|13|8|@]|9|@$O|14|P|15|1|16]]|A|$]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

The regular expression you are looking for is

<pre><code>^[a-z A-Z0-9\/\\.'"]+$
</code></pre>

Remember if you are using PHP you need to use \ to escape the backslashes and the quotation mark you use to encapsulate the string.

In PHP using preg_match it should look like this:

<pre><code>preg_match("/^[a-z A-Z0-9\\/\\\\.'\"]+$/",$value);
</code></pre>

This is a good place to find the regular expressions you might want to use.
<a href="http://regexpal.com/">http://regexpal.com/</a>

blocks|key|771242|text|您可以通过在特殊字符前面附加一个\来转义它们。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|771243|entityMap^0|G|1|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

You can always escape them by appending a <code>\</code> in front of the special characters.

blocks|key|748618|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|748619|preg_match("/[A-Za-z0-9\/\\.'\"]/",+...)|code-block|syntax|javascript|748620|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|$]]

try this:

<pre><code>preg_match("/[A-Za-z0-9\/\\.'\"]/", ...)
</code></pre>

blocks|key|771385|text|NikoRoberts是100%25正确的。我只想添加以下建议:在创建PHP正则表达式字符串时，始终使用:单引号。需要转义的字符要少得多(即只有单引号和反斜杠本身需要转义(如果反斜杠出现在字符串的末尾，则只需要转义))。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|771386|当处理反斜杠汤时，它有助于打印出(解释的)+regex字符串。这向您展示了正在呈现给regex引擎的确切内容。|771387|此外，一个“数字”可能有一个可选的标志？是?下面是我的解决方案(以测试脚本的形式)：|771388|<?php+//+test.php+20110311_1400
++++$data_good+=+'abcdefghijklmnopqrstuvwxyzABCDE'.
++++++++'FGHIJKLMNOPQRSTUVWXYZ0123456789%2B-+/\\.\'"';
++++$data_bad+=+'abcABC012~!@##$%25%5E&*()';

++++$re+=+'%25%5E[a-zA-Z0-9%2B\-+/\\\\.\'"]*$%25';
++++echo($re+."\n");
++++if+(preg_match($re,+$data_good))+{
++++++++echo("CORRECT:+Good+data+matches.\n");
++++}+else+{
++++++++echo("ERROR!+Good+data+does+NOT+match.\n");
++++}
++++if+(preg_match($re,+$data_bad))+{
++++++++echo("ERROR!+Bad+data+matches.\n");
++++}+else+{
++++++++echo("CORRECT:+Bad+data+does+NOT+match.\n");
++++}
?>|code-block|syntax|javascript|771389|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|O|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|P|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

NikoRoberts is 100% correct.
I would only add the following suggestion: When creating a PHP regex pattern string, always use: single-quotes. There are far fewer chars which need to be escaped (i.e. only the single quote and the backslash itself needs to be escaped (and the backslash only needs to be escaped if it appears at the end of the string)).

When dealing with backslash soup, it helps to print out the (interpreted) regex string. This shows you exactly what is being presented to the regex engine.

Also, a "number" might have an optional sign? Yes? Here is my solution (in the form of a tested script):



<pre class="lang-php prettyprint-override"><code>&lt;?php // test.php 20110311_1400
 $data_good = 'abcdefghijklmnopqrstuvwxyzABCDE'.
 'FGHIJKLMNOPQRSTUVWXYZ0123456789+- /\\.\'"';
 $data_bad = 'abcABC012~!@##$%^&amp;*()';

 $re = '%^[a-zA-Z0-9+\- /\\\\.\'"]*$%';
 echo($re ."\n");
 if (preg_match($re, $data_good)) {
 echo("CORRECT: Good data matches.\n");
 } else {
 echo("ERROR! Good data does NOT match.\n");
 }
 if (preg_match($re, $data_bad)) {
 echo("ERROR! Bad data matches.\n");
 } else {
 echo("CORRECT: Bad data does NOT match.\n");
 }
?&gt;
</code></pre>

blocks|key|2889344|text|下面的regex将匹配符合您所给描述的单个字符：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2889345|[a-zA-Z0-9\+\\\/\.\'\"]|code-block|syntax|javascript|2889346|如果您的目的是确保在字符串中只使用此范围内的字符，则可以使用以下否定：|2889347|[%5Ea-zA-Z0-9\+\\\/\.\'\"]|2889348|在第二种情况下，您可以使用regex查找不好的内容(您不想被包括在内)，如果它没有找到任何东西，那么您的字符串模式必须是纯正的，因为我假设如果您找到一个不在适当范围内的字符，那么您的字符串就无效。|2889349|因此，要用PHP语法来表示：|2889350|$regex+=+"[%5Ea-zA-Z0-9\+\\\/\.\'\"]"

if+preg_match(+$regex,+...+)+{
++++//+handle+the+bad+stuff
}|2889351|编辑1:我完全忽略了一个事实，即反斜杠在php双引号字符串中是特殊的，所以下面是对上述代码的更正：|2889352|$regex+=+"[%5Ea-zA-Z0-9\\+\\\\\\/\\.\\'\\\"]"|2889353|如果这样做不起作用，应该不会花太多的时间来调试有多少反斜杠需要用反斜杠转义，还有哪些其他字符也需要转义.|2889354|entityMap^0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|14|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|15|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|16|8|@]|9|@]|A|$E|F]]|$1|U|3|V|5|6|7|17|8|@]|9|@]|A|$]]|$1|W|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|X|$]]

The following regex will match a single character that fits the description you gave:

<pre><code>[a-zA-Z0-9\ \\\/\.\'\"]
</code></pre>

If your point is to insure that ONLY characters in this range of characters are used in your string, then you can use the negation of this which would be:

<pre><code>[^a-zA-Z0-9\ \\\/\.\'\"]
</code></pre>

In the second case, you could use your regex to find the bad stuff (that you don't want to be included), and if it didn't find anything then your string pattern must be kosher, because I'm assuming that if you find one character that is not in the proper range, then your string is not valid.

so to put it in PHP syntax:

<pre><code>$regex = "[^a-zA-Z0-9\ \\\/\.\'\"]"

if preg_match( $regex, ... ) {
 // handle the bad stuff
}
</code></pre>

Edit 1:
I've completely ignored the fact that backslashes are special in php double-quoted strings, so here is a correcting to the above code:

<pre><code>$regex = "[^a-zA-Z0-9\\ \\\\\\/\\.\\'\\\"]"
</code></pre>

If that doesn't work it shouldn't take too much for someone to debug how many of the backslashes need to be escaped with a backslash, and what other characters need also to be escaped....

i am looking for a regex that can contain special chracters like <code>/ \ . ' "</code>

in short i would like a regex that can match the following:

<ul>
<li>may contain lowercase</li>
<li>may contain uppercase</li>
<li>may contain a number</li>
<li>may contain space</li>
<li>may contain <code>/ \ . ' "</code></li>
</ul>

i am making a php script to check if a certain string have the above or not, like a validation check.

regex with special characters?

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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我正在寻找一个正则表达式，它可以包含像/ \ . ' "这样的特殊切割机。简而言之，我想要一个可以与以下内容相匹配的正则表达式：/ \ . ' " 可以包含小写可以包含大写可以包含数字可以包含空格<code>H 110</code>可以包含我正在制作一个php脚本来检查某个字符串是否有上面的内容，就像验证检查一样。

问有特殊角色吗？
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