如何保留字符串中的"\\u"并删除其后的字符？
Warning: preg_replace(): Compilation failed: PCRE does not support \L, \l, \N{name}, \U, or \u at offset 55 in /www/wwwroot/app.fanyaozu.com/wp-content/themes/yusi1.0/functions.php on line 648
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