php - detect if variable has only spaces or not

I have a variable, and I need to only add it to an array if it contains something other than spaces.

Up until now I had been using $var != ''. That only covers if it's an empty string. I need i开发者_如何转开发t to cover if it has spaces in it.

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This will check if a string contains at least one non-whitespace character. Whitespace includes spaces, newlines, tabs, etc.

trim($var) != ''

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have you tried empty() ?

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trim($var, ' ') != ''