I have no clue how to validate this string. I am simply supplying an IV for an encryption, but can find no 1is_hex()1 or similar function, I can’t wrap my head around it! I read on a comment in the php documentation (user contrib. notes) this:I have no clue how to validate this string. I a
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PHP:简单，验证字符串是否是十六进制?
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