我有几个包含unicode的字符串。我的任务是从除了unicode之外的这些字符串中删除所有内容,例如,在
下面\ud83d\ude82 + \u2600\ufe0f = \ud83d\ude29\ud83d\ude29\ud83d\ude29\ud83d\ude29\ud83d\ude29
会变成
\ud83d\ude82 \u2600\ufe0f \ud83d\ude29\ud83d\ude29\ud83d\ude29\ud83d\ude29\ud83d\ude29
然后我需要查找重复代码,并将它们分开以便:
\ud83d\ude29\ud83d\ude29\ud83d\ude29\ud83d\ude29\ud83d\ude29
变为:
\ud83d\ude29 \ud83d\ude29 \ud83d\ude29 \ud83d\ude29 \ud83d\ude29
我已经为第一位尝试了几个preg_match解决方案,但它要么不删除字符串中的任何字符,要么删除所有内容。以下是最新的尝试,
/(^\\\u[0-9a-f]{4})+/
对Regex不太熟悉,我开始困惑,因为我不确定还有什么可以尝试。
这样,最终,我能够将每个unicode作为自己的记录插入数据库。
答案 0 :(得分:0)
可以分两步完成:
$str = '\ud83d\ude82 + \u2600\ufe0f = \ud83d\ude29\ud83d\ude29\ud83d\ude29\ud83d\ude29\ud83d\ude29';
// remove non unicode character
$str = preg_replace('/(?<=\\\\u[a-f0-9]{4})[^\\\\]+/', '', $str);
// insert space between repeated pair
$str = preg_replace('/((?:\\\u[a-f0-9]{4}){2})(?=\1)/', '$1 ', $str);
echo $str,"\n";
<强>输出:强>
\ud83d\ude82\u2600\ufe0f\ud83d\ude29 \ud83d\ude29 \ud83d\ude29 \ud83d\ude29 \ud83d\ude29
正则表达式#1:
/ : regex delimiter
(?<= : lookahead
\\\\u[a-f0-9]{4} : unicode character
) : end lookahead
[^\\\\]+ : 1 or more any character that is NOT a backslash
/ : regex delimiter
正则表达式#2:
/ : regex delimiter
( : start group 1
(?: : non capture group
\\\\u[a-f0-9]{4} : a unicode character
){2} : appears twice (2 unicode characters)
) : end group 1
(?=\1) : lookahead, group 1 is repeated
/ : regex delimiter