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<!DOCTYPE html> <html> <body> <?php $a = 0; // True because $a is empty if (empty($a)) { echo "Variable 'a' is empty.<br>"; } // True because $a is set if (isset($a)) { echo "Variable 'a' is set."; } ?> </body> <!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_func_var_empty by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:51:08 GMT --> </html>
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