使用i修饰符可以忽略大小写匹配,m,s,x呢？

Answer 1

Use the i modifier to ignore case matching. What about m, s, and x? -PHP Chinese website Q&A-Using the i modifier can ignore case matching, what about m, s, x? -PHP Chinese website Q&A

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Answer 2

i 忽略大小写 m 增强行锚点模式 s 点号通配模式 x 宽松排列和注释模式