用逗号和 - （连字符）多个爆炸字符

Question

我想explode为所有人提供一个字符串：

1. 空格（\ n \ t等）
2. 逗号
3. 连字符（小破折号）。像这样＆gt;＆gt; -

但这不起作用：

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

怎么做？

Answer 1

爆炸不能那样做。有一个很好的函数叫preg_split。这样做：

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

输出：

  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)

顺便说一句，不要使用split，不推荐使用。

Answer 2

...或者如果你不喜欢正则表达式并且你仍想要爆炸，你可以在爆炸之前只用一个字符替换多个字符：

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

这吹进了：

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."
}