Replacing One Character In A String With A Random Character

Just an hour or so ago, Ron Piggot asked a question on the PHP General mailing list. The original question was how he could replace a single matching character in a string containing multiple matches with another random character.  I mocked up a working example in about five minutes or so.  It’s far from perfect, and not very elegant, but it’ll work as a starting point of reference.

The code I sent back in reply follows:


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