preg_match(): Compilation failed: character value in \x{} or \o{} is too large at offset xx on line number xx

共计 113 个字符，预计需要花费 1 分钟才能阅读完成。

preg_match在匹配 UTF-8 时不加 u 修饰符会发出此警告。

<?php

preg_match("/^\x{3010}(.*)\x{3011}/u", $content, $matches);

var_dump($matches);