I would like to join 2 numbers in to one number.

Example:

a=51

b=7543

now c = ab = 517543

d = ba = 754351

how can I join two numbers like shown above ?

I would like to join 2 numbers in to one number.

Example:

a=51

b=7543

now c = ab = 517543

d = ba = 754351

how can I join two numbers like shown above ?

Not sure if it’s the best solution, but here I go

```
$a=51;
$b=7543 ;
$c = (int)($a . $b);
$d = (int)($b . $a);
```

Couldn’t you just do

```
$a = 51;
$b = 7543;
$c = $a . $b;
$d = $b . $a;
```

and retain them as numbers?

Sure and don’t forget about PHP loose type juggling as this would work too. And yes afterwards you can still perform mathematical functions on them

```
$a = 51;
$b = 7543;
$c = "$a$b";
$d = "$b$a";
```