0=='Somevalue'

[kamal_sahoo]

When I use 0=='Somevalue' it returns true. Is this a PHP bug?

 

For example :

<?

if(0=='Unlimited')

echo "Yes unlimited";

 

It prints "Yes Unlimited";

?>

[Guest]

Why should that be a bug?

 

Matti

[Guest]

from php.net

 

If you compare an integer with a string, the string is converted to a number. If you compare two numerical strings, they are compared as integers.

 

And for the conversion:

The value is given by the initial portion of the string. If the string starts with valid numeric data, this will be the value used. Otherwise, the value will be 0 (zero).

[kamal_sahoo]

Thanks, Mark.

Yes you are right.

When integer compares with string the string first converts to integer and then comparasion takes place.

But how is it possible :

'Somevalue'==0 returns true.

It compares string to integer.

Don't you think first integer converts to string and then comparasion takes place.

 

thanks in advance.

[Guest]

'Somevalue'==0 returns true.

 

no, because see what it says:

If the string starts with valid numeric data, this will be the value used. Otherwise, the value will be 0 (zero).

so 'somevalue' is first coverted to 0.

[kamal_sahoo]

Ok, That's great.

Thank you very much.

[Harald Ponce de Leon]

You might want to use the following instead:

 

'somevalue' === 0

 

The === makes an additional check to see if both values are of the same type.