我想要用explode
函数将一个字符串按以下方式拆分:
- 空格(\n \t 等)
- 逗号
- 短划线。例如 >> -
但是以下代码不起作用:
$keywords = explode("\n\t\r\a,-", "my string");
如何实现这个目标?
Explode不能做到这一点。有一个很好的函数叫做preg_split
可以实现这个功能。像这样做:
$keywords = preg_split("/[\s,-]+/", "This-sign, is why we can't have nice things");
var_dump($keywords);
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)
顺便提一下,不要使用split
,它已经过时了。
如果您不喜欢正则表达式,但仍想分解内容,您可以在分解之前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);
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."
}