正则表达式真的很差,提前抱歉!
我已经尽力弄清楚如何将字符串拆分为具有两个分隔符的数组,并且仍然捕获一个并将其包含在最终数组中。 preg_split
似乎很理想,但我的常规表达让我失望。
例如,如果我有字符串foo = bar AND bar=foo
;我想在空格或=
字符处拆分字符串,但保留=
,以便数组如下所示:
Array
(
[0] => foo
[1] => =
[2] => bar
[3] => AND
[4] => bar
[5] => =
[6] => foo
)
不幸的是,我得到了这个:
Array
(
[0] => foo
[1] =>
[2] => =
[3] =>
[4] => bar
[5] => AND
[6] => bar
[7] => =
[8] => foo
)
我这里有这段代码(在 PHP 中):
<!doctype html>
<?php
$string = 'foo = bar AND bar=foo';
$array = preg_split('/ +|(=)/', $string, -1, PREG_SPLIT_DELIM_CAPTURE);
?>
<pre>
<?php
print_r($array);
?>
</pre>
我真的很感激你们能提供的任何帮助,谢谢大家!
添加PREG_SPLIT_NO_EMPTY
标志:
$string = 'foo = bar AND bar=foo';
$array = preg_split('/ +|(=)/', $string, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
现在,这将输出:
Array
(
[0] => foo
[1] => =
[2] => bar
[3] => AND
[4] => bar
[5] => =
[6] => foo
)
要么使用 PREG_SPLIT_NO_EMPTY
来核弹"空"匹配:
$array = preg_split('/ +|(=)/', $string, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
或者,更改正则表达式,使其不会生成空匹配项:
$array = preg_split('/ +|(?<!'G)(=)/', $string, -1, PREG_SPLIT_DELIM_CAPTURE);