Multiple explode characters with comma and - (hyphen)

I want to explode a string for all:

1. whitespaces (\n \t etc)
2. comma
3. hyphen (small dash). Like this >> -

But this does not work:

$keywords = 开发者_Go百科explode("\n\t\r\a,-", "my string");

How to do that?

Explode can't do that. There is a nice function called preg_split for that. Do it like this:

$keywords = preg_split("/[\s,-]+/", "This-sign, is why we can't have nice things");
var_dump($keywords);

This outputs:

  array
  0 => string 'This' (length=4)
  1 => string 'sign' (length=4)
  2 => string 'is' (length=2)
  3 => string 'why' (length=3)
  4 => string 'we' (length=2)
  5 => string 'can't' (length=5)
  6 => string 'have' (length=4)
  7 => string 'nice' (length=4)
  8 => string 'things' (length=6)

BTW, do not use split, it is deprecated.

... or if you don't like regexes and you still want to explode stuff, you could replace multiple characters with just one character before your explosion:

$keywords = explode("-", str_replace(array("\n", "\t", "\r", "\a", ",", "-"), "-", 
  "my string\nIt contains text.\rAnd several\ntypes of new-lines.\tAnd tabs."));
var_dump($keywords);

This blows into:

array(6) {
  [0]=>
  string(9) "my string"
  [1]=>
  string(17) "It contains text."
  [2]=>
  string(11) "And several"
  [3]=>
  string(12) "types of new"
  [4]=>
  string(6) "lines."
  [5]=>
  string(9) "And tabs."
}