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How to remove non-alphanumeric characters?
...ld'); // helloworld
preg_replace('/[^\p{L}\p{N} ]+/', '', 'abc@~#123-+=öäå'); // abc123öäå
preg_replace('/[^\p{L}\p{N} ]+/', '', '你好世界!@£$%^&*()'); // 你好世界
Note: This is a very old, but still relevant question. I am answering purely to provide supplementary information...
Excel to CSV with UTF8 encoding [closed]
...r alternative - basically they use VB macro or addins to force the save as UTF8. I have not tried any of these solutions but they sound reasonable.
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What does the ??!??! operator do in C?
...if (x || y) { a[i] = '\0'; } looking like if (x öö y) ä aÄiÅ = 'Ö0'; å in the wrong charset.
– Ilmari Karonen
Oct 20 '11 at 13:36
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SET NAMES utf8 in MySQL?
... 'ö' and 'ñ' are extended ASCII. Would you still need to SET NAMES UTF8 for them?
– Tim
Jun 26 '11 at 7:12
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Encode html entities in javascript
...hese conversions does not solve all the problems -- make sure you're using UTF8 character encoding, make sure your database is storing the strings in UTF8. You still may see instances where the characters do not display correctly, depending on system font configuration and other issues out of your c...
How to do a regular expression replace in MySQL?
I have a table with ~500k rows; varchar(255) UTF8 column filename contains a file name;
13 Answers
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Java : How to determine the correct charset encoding of a stream
... the the first two bytes of a file, only 38% of the combinations are valid UTF8. The odds of the first 5 codepoints being valid UTF8 by chance is less than .77%. Likewise, UTF16BE and LE are usually easily identified by the large number of zero bytes and where they are.
– Moo...
Unicode equivalents for \w and \b in Java regular expressions?
... underscore). That way, a regex like \w+ matches words like hello , élève , GOÄ_432 or gefräßig .
3 Answers
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How to determine the encoding of text?
... encoded using:
# (1) The default operating system code page, Or
# (2) utf8 with a BOM header
#
# If a text file is encoded with utf8, and does not have a BOM header,
# the user can manually add a BOM header to the text file
# using a text editor such as notepad++, and rerun the python script...
What's the difference between utf8_general_ci and utf8_unicode_ci?
Between utf8_general_ci and utf8_unicode_ci , are there any differences in terms of performance?
8 Answers
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