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<!DOCTYPE html> <html lang="en"> <head> <title>Example of Testing Whether a Variable is Empty in PHP</title> </head> <body> <?php $var1 = ''; $var2 = 0; $var3 = NULL; $var4 = FALSE; $var5 = array(); // Testing the variables if(empty($var1)){ echo 'This line is printed, because the $var1 is empty.'; } echo "<br>"; if(empty($var2)){ echo 'This line is printed, because the $var2 is empty.'; } echo "<br>"; if(empty($var3)){ echo 'This line is printed, because the $var3 is empty.'; } echo "<br>"; if(empty($var4)){ echo 'This line is printed, because the $var4 is empty.'; } echo "<br>"; if(empty($var5)){ echo 'This line is printed, because the $var5 is empty.'; } ?> </body> </html>
