The meaning of /u, /i, /s in preg_match regular match in PHP, phppreg_match
What is /u /i /s in preg_match regular match in PHP Meaning
/u means matching according to unicode (utf-8) (mainly for multi-bytes such as Chinese characters)
/i means case-insensitive (if there is a in the expression, then A is also the matching object)
/s means treat the string as a single line to match
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