删除PHP中的所有种类的选项卡，空格，回车符

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I'd like to be able to remove all the carriage returns, so it becomes like this:

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How do I do this in PHP? Note that the strings might be UTF-8 string, and we need to take into account various kinds of tab, carriage return and white space characters. (I am thinking along the lines of a tokeniser algorithm used in a compiler, where multiple carriage return and white space characters are taken care of.)

You can try this with a preg_replace:

http://php.net/manual/en/function.preg-replace.php

$data = preg_replace('/[\s\t
]{2,}/', ' ', $data);

You can learn more about regular expressions where: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions

You can test them live here: https://www.phpliveregex.com/

Try like this with preg_replace() to replace multiple spaces to single space instead of removing tabs(\t), spaces(\s), carriage return() or line feed()

echo preg_replace('/\s+/', ' ', $your_input_string_with_multi_space_goes);

DEMO: https://3v4l.org/XMoVr