PHP preg_split 如果不在大括号内 [英] PHP preg_split if not inside curly brackets

问题描述

我正在使用 PHP 制作脚本语言解释器.我有这种脚本语言的代码:

I'm makin' a scripting language interpreter using PHP. I have this code in that scripting language:

write {Hello, World!} in either the color {blue} or {red} or {#00AA00} and in either the font {Arial Black} or {Monaco} where both the color and the font are determined randomly

(是的，很难相信，但这就是语法)

(Yes, it's hard to believe but that's the syntax)

我必须使用哪个正则表达式来拆分它(按空格拆分)，但前提是不在大括号内.所以我想把上面的代码变成这个数组:

Which regex must I use to split this (split by spaces) but only if not inside the curly brackets. So I want to turn the above code into this array:

1. 写
2. 你好，世界！
3. 在
4. 要么
6. 颜色
7. 蓝色
8. 或
9. 红色
10. 或
11. #00AA00
12. 和
13. 在
14. 要么
16. 字体
17. Arial Black
18. 或
19. 摩纳哥
20. 哪里
21. 两者
23. 颜色
24. 和
25. 字体
26. 是
27. 确定
28. 随机

(大括号内的字符串以粗体显示在上面)大括号内的字符串每个必须是一个元素.所以 {Hello, World!} 不能是:1. 你好2. 世界！

(The strings inside the curly brackets are show above in bold) The strings inside the curly brackets must be one element each. So {Hello, World!} cannot be: 1. Hello, 2. World!

我该怎么做?

提前致谢.

推荐答案

使用这样的东西怎么样:

what about using something like this :

$str = 'write {Hello, World!} in either the color {blue} or {red} or {#00AA00} and in either the font {Arial Black} or {Monaco} where both the color and the font are determined randomly';

$matches = array();
preg_match_all('#\{.*?\}|[^ ]+#', $str, $matches);

var_dump($matches[0]);

哪个会让你:

array
  0 => string 'write' (length=5)
  1 => string '{Hello, World!}' (length=15)
  2 => string 'in' (length=2)
  3 => string 'either' (length=6)
  4 => string 'the' (length=3)
  5 => string 'color' (length=5)
  6 => string '{blue}' (length=6)
  7 => string 'or' (length=2)
  8 => string '{red}' (length=5)
  9 => string 'or' (length=2)
  10 => string '{#00AA00}' (length=9)
  11 => string 'and' (length=3)
  12 => string 'in' (length=2)
  13 => string 'either' (length=6)
  14 => string 'the' (length=3)
  15 => string 'font' (length=4)
  16 => string '{Arial Black}' (length=13)
  17 => string 'or' (length=2)
  18 => string '{Monaco}' (length=8)
  19 => string 'where' (length=5)
  20 => string 'both' (length=4)
  21 => string 'the' (length=3)
  22 => string 'color' (length=5)
  23 => string 'and' (length=3)
  24 => string 'the' (length=3)
  25 => string 'font' (length=4)
  26 => string 'are' (length=3)
  27 => string 'determined' (length=10)
  28 => string 'randomly' (length=8)

，你只需要迭代这些结果；以{开头并以}结尾的将是您的重要"词，其他将是其余的.

The, you just have to iterate over those results ; the ones starting by { and ending by } will be your "important" words, and the others will be the rest.

在评论后识别重要词的一种方法是这样的:

Edit after the comment : one way to identify the important words would be something like this :

foreach ($matches[0] as $word) {
    $m = array();
    if (preg_match('#^\{(.*)\}$#', $word, $m)) {
        echo '<strong>' . htmlspecialchars($m[1]) . '</strong>';
    } else {
        echo htmlspecialchars($word);
    }
    echo '<br />';
}

或者，就像你说的，使用 strpos 和 strlen 也可以工作 ;-)

Or, like you said, working with strpos and strlen would work too ;-)

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