PHP check if string is just white space?

Posted by John Isaacks on Stack Overflow See other posts from Stack Overflow or by John Isaacks
Published on 2010-06-07T19:06:13Z Indexed on 2010/06/07 19:12 UTC
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I do not want to change a string nor do I want to check if it contains white space. I want to check if the entire string is ONLY white space. What the best way to do that?

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