我发现,为确定间隔时间,有多种办法,有一封信件或数份,但我如何确定其中是否有2份说明?
我试图确认一个口号。
确实有8个性
其中必须写上上信。
其中2人必须是人数
是否有一条线解决办法?
if (preg_match(
/^ # Start of string
(?=.*p{Lu}) # at least one uppercase letter
(?=.*d.*d) # at least two digits
.{8} # exactly 8 characters
$ # End of string
/xu ,
$subject)) {
# Successful match
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