如何判断字符串中的空白类型？
我正在从 10 年历史的网站 中抓取一些信息，该网站是使用 Frontpage（最初）和 Dreamweaver 在 ASP 中构建的（最近）。我正在使用 PHP。
我正在返回带有空白而不是空格的字符串。使用 PHP 修剪功能，可以删除一些空白，但不是全部。
original string: string(47) " School Calendar"
trimmed string: string(34) " School Calendar"
如何找出空白是什么以便将其删除？
我的页面显示了原始字符串和修剪字符串的 var_dumps，位于此处。
I am scraping some information from a 10 year old website that was built in ASP using Frontpage(originally) and Dreamweaver(lately). I am using PHP.
I am getting back strings with whitespace that is not spaces. Using the PHP trim function, some of the white space is removed but not all.
original string: string(47) " School Calendar"
trimmed string: string(34) " School Calendar"
How do I figure out what the whitespaces are so I can remove them?
My page showing var_dumps of the original and trimmed strings is here.
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看起来（如果您在页面上查看源代码），您的字符串具有
最好的选择可能是通过调用 str_replace 修剪之前：
$stringToTrim = str_replace(" "," ", $original);$trimmed = trim($stringToTrim);（不是使用标准代码格式，因为它没有正确处理
It looks like (if you view source on your page), that you're string has
The best option is probably to replace these in advance, by calling str_replace prior to trim:
$stringToTrim = str_replace(" "," ", $original);$trimmed = trim($stringToTrim);(Not using standard code formatting because it wasn't handling the
echo ord($trimmed_string)会告诉您该示例中空格的字符代码是什么。 （它给出第一个字符的字符代码。）echo ord($trimmed_string)will tell you what the character code of the whitespace in that example is. (It gives the character code of the first character.)Unicode 有大量“不同”的空间：
http://en.wikipedia.org/wiki/Space_%28punctuation%29# Table_of_spaces
http://www.brunildo.org/test/space-chars .html
Trim 并不了解所有这些。如果需要，您应该使用正则表达式将它们全部删除。
Unicode has a plenty of "different" spaces:
http://en.wikipedia.org/wiki/Space_%28punctuation%29#Table_of_spaces
http://www.brunildo.org/test/space-chars.html
Trim doesn't know about them all. You should use regex to get rid of them all if you need.