The difference between empty and isset in PHP

/** * isset-detection variables are set * Returns TRUE if the variable exists, otherwise false * * empty-Check if a variable is empty * If the variable is a non-null or nonzero value, empty () returns false **/ $is _var = "; if (Isset ($is _var)) { echo "Variable exists! "; } else { echo "variable does not exist! "; } if (Empty ($is _var)) { echo "Variable is empty! "; } else { echo "variable is not empty! "; } ?> Copy Code Output: variable exists! The variable is empty!

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