php - 如何在 PHP 中获取字符串中的所有美元符号及其后面的文本

Question

marc 21 标签可能包含一行包含多个美元符号 $ 的内容，例如:

$string='10$athis is text a$bthis is text b/$cthis is text$dthis is text d';

我尝试匹配所有美元歌曲并在每次歌曲后获取文本，我的代码是:

preg_match_all("/\\$[a-z]{1}(.*?)/", $string, $match);

输出是:

Array
(
    [0] => Array
        (
            [0] => $a
            [1] => $b
            [2] => $c
            [3] => $d
        )

    [1] => Array
        (
            [0] => 
            [1] => 
            [2] => 
            [3] => 
        )

)

如何在每次唱歌后捕获文本，以便输出为:

Array
(
    [0] => Array
        (
            [0] => $a
            [1] => $b
            [2] => $c
            [3] => $d
        )

    [1] => Array
        (
            [0] => this is text a
            [1] => this is text b/
            [2] => this is text c
            [3] => this is text d
        )

)

Answer 1

您可以使用正向前瞻来匹配 \$ 字面意思或字符串结尾，例如

(\$[a-z]{1})(.*?)(?=\$|$)

<强> Regex Demo

PHP 代码

$re = "/(\\$[a-z]{1})(.*?)(?=\\$|$)/"; 
$str = "10\$athis is text a\$bthis is text b/\$cthis is text\$dthis is text d"; 
preg_match_all($re, $str, $matches);

<强> Ideone Demo

注意:- 您所需的结果位于 Array[1] 和 Array[2] 中。 Array[0] 保留用于整个正则表达式找到的匹配。