2 php regex programming-languages preg-split
我是一个使用PHP的脚本语言解释器.我用这种脚本语言编写了这段代码:
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
Run Code Online (Sandbox Code Playgroud)
(是的,很难相信,但那是语法)
我必须使用哪个正则表达式来拆分它(用空格分割),但仅限于不在大括号内.所以我想把上面的代码转换成这个数组:
(大括号内的字符串以粗体显示在上面)大括号内的字符串必须是每个元素.所以{Hello,World!}不能:1.你好,2.世界!
我怎样才能做到这一点?
提前致谢.
怎么样使用这样的东西:
$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]);
Run Code Online (Sandbox Code Playgroud)
哪个会给你:
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)
Run Code Online (Sandbox Code Playgroud)
你必须迭代这些结果; 以{开头}开头的那些将是你的"重要"词汇,其他人将是其余的.
评论后编辑:识别重要单词的一种方法是这样的:
foreach ($matches[0] as $word) {
$m = array();
if (preg_match('#^\{(.*)\}$#', $word, $m)) {
echo '<strong>' . htmlspecialchars($m[1]) . '</strong>';
} else {
echo htmlspecialchars($word);
}
echo '<br />';
}
Run Code Online (Sandbox Code Playgroud)
或者,就像你说的那样,使用strpos和strlen也会起作用;-)