Thread: Need help with PHP

I'm stuck with a php code:

Code:

if ($currency="EUR") {
    $curr = "€";
} elseif ($currency="GBP") {
    $curr = "£";
} else {
    $curr = "$";
}
echo $curr;

The $currency is defined, but $curr is always showing EUR. I'm sure there is only a small thing that I'm missing, but I'm new with php and can't solve this problem.

Some help would be appreciated!
Thank you!

Watch out for the "=" assignment operator you have used in the if condition.

You need to use the comparison operator "==" to check "if a value is equal to some other value."

For instance,

PHP Code:

if($currency = "EUR") 


should be

PHP Code:

if($currency == "EUR") 


To avoid this error, you can use if("EUR"==$currency). If you happen to miss out an equal sign, the PHP engine will point out the error.

Naweed hit the nail on the head, but I want to add that it's best to avoid these nested if else statements and go for the switch statement such as:

PHP Code:

switch ($currency) {
    case 'EUR':
        $curr = '€';
        break;
    case 'USD':
        $curr = '&usd;';
        break;
    default:
        $curr = '£';
        break;
} 


Originally Posted by Andy101

Naweed hit the nail on the head, but I want to add that it's best to avoid these nested if else statements and go for the switch statement such as:

PHP Code:

switch ($currency) {
    case 'EUR':
        $curr = '€';
        break;
    case 'USD':
        $curr = '&usd;';
        break;
    default:
        $curr = '£';
        break;
} 


Thank you for your reply and help! This works perfect!

I still find myself putting one = sign once in awhile and I've been doing this for like 7 years now

Note : In any programming language when you use If condition, so you must be used == operator. Otherwise, you will get the error.

Example : if(x==y)

Even more:

if you want to check if a sequence of characters are in a string, the position may be zero i.e. from the start which can be evaluated as false, so in PHP and I suspect other programming languages you should use 3 equals signs (exactly equal to) such as:

PHP Code:

$s = "Hello World";

if (strpos($s, 'Hello') === 0) echo "Found"; else echo "Not found"; 


The opposite comparison operator is !==

PHP Code:

$s = "Hello World";

if (strpos($s, 'Hello') !== false) echo "Found"; else echo "Not found"; 


Originally Posted by talmadgetab

Note : In any programming language when you use If condition, so you must be used == operator. Otherwise, you will get the error.

Example : if(x==y)

In PHP that is not the case. It's common to use a statement containing a function call with a return value of false or an expected value. Not the most robust way to code, but it is done a lot with database access code.

if you use nested if and else, you should put == for equivalent to "is equal to".