I try to round a number at 0.5

This is my examples :

```
5.1 > 5
2.4 > 2.5
1 > 1
6.8 > 7
6.2 > 6.5

```

I try with :

```
<?php
round((4.4 * 2) / 2)
?>

```

But :

```
5.4 > 5
4.7 > 5

```

instead of

```
5.4 > 5.5
4.7 > 4.5

```

Any idea ?