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Quick Tip: How To Check if a Variable Is Set in PHP — SitePoint

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Quick Tip: How To Check if a Variable Is Set in PHP — SitePoint

Learn how to check if a variable is set in PHP, what its values are, and the differences between the isset, is_null, and empty methods.

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Quick Tip: How To Check if a Variable Is Set in PHP — SitePoint

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Quick Tip: How To Check if a Variable Is Set in PHP — SitePoint

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