Question

how to see in string all spec symbols?

Examples: space, new line, tab and t.t

Answer 1

I dont know exactly, what you mean by “see”.

You can use preg_match_all() with the *PREG_OFFSET_CAPTURE* -Flag and you will get any occurence. You can then use this to do, what you like. If you really just want to see “something”, use Pekkas solution.

$string = str_replace(array("\t","\n"," "),array('<TAB>','<NEWLINE>','<SPACE>'), $string);

Its exactly the same, but in one call.

Update: addcslashes()

$string = addcslashes($string, "\n\t\r ");