Easy to make mistake

hellow…I am trying to post a very simple Example of php variabe assigning..Its easy to make mistake when we assign values.Run the php code:

<?php

$a=0;

$b;

if ($a==$b) print(”values are same<br>”);

else print(”Variables are different<br>”);

?>

output: values are same.

It means the value of $b is 0.

yaa….thats right.when we declare a php variabe Its initial value is 0 in number format.In strig format it is an empty string…its different in C++.

Just try to edit the code like folowing:

<?php

$a;

$b;

if ($a==$b) print(”values are same<br>”);

else print(”Variables are different<br>”);

?>

output is same coz both of these variables values are empty string or NULL..

we can print the value of $b.

printf(”%f”,$b);   //result is 0.0000…//

so be aware of using these types of variable assignment……..I think It will help you…..:)