mysql-php how to get rid of special characters read from Linux files

Each line in a Linux file is recorded in a string, such as-- I波纹管 ,
When I read this line of data from a file through PHP, it becomes------- I^B波纹管 How do I get rid of this kind of special character by "^b"?

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Each line in a Linux file is recorded in a string, such as-- I波纹管 ,
When I read this line of data from a file through PHP, it becomes------- I^B波纹管 How do I get rid of this kind of special character by "^b"?

I don't know if this ^b is the one with ASCII code 2.
Reference here: http://www.robelle.com/smugbook/ascii.html

If it's really the case, in PHP you can get/replace the character in this way:

$str = 'some string';$ctrl_b = chr(2);$new_str = str_replace($ctrl_b, '', $str);

Reference here: HTTP://US1.PHP.NET/CHR

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