How to replace the characters in fixed positions in PHP?

Posted by user198729 on Stack Overflow See other posts from Stack Overflow or by user198729
Published on 2010-03-25T08:04:46Z Indexed on 2010/03/25 8:13 UTC
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I want to replace with the 4~8 characters of a string with *,how to do it?

HelloWorld

=>

Hell****ld

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