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How can I remove the ETX character (0x03) from the end of a string? I'd either like a function, otherwise I can write a regular expression, all I want to know is how to match the ETX character in a regular expression? trim() doesn't work.
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One useful function that can be used to remove special characters from a string is the str_replace() function. The empty string must be used to the replace character in this function to remove the specified character. The syntax of this function is given below. The str_replace() function can take four arguments.
The ltrim() function removes whitespace or other predefined characters from the left side of a string. Related functions: rtrim() – Removes whitespace or other predefined characters from the right side of a string. trim() – Removes whitespace or other predefined characters from both sides of a string.
Control characters are e.g. line feed, tab, escape.
To complete Charles' answer, I had a case where the ETX character was not at the end of the line so I had to use the following code:
$string = preg_replace('/\x03/', '', $string);
Just remove the $ sign.
136
Have you tried rtrim function
http://php.net/manual/en/function.rtrim.php
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