I need to parse a very big XML file, with a filesize of 750Mo !

I have meomy limit at 512M

```
ini_set('memory_limit', '512M');

```

I have no problem to open file under 30Mo, but with 750Mo, I obtain a fatal error

```
Fatal error: Allowed memory size of 1677721600 bytes exhausted (tried to allocate 2988843769 bytes)

```

I do that to open files :

```
$fichier = file_get_contents($inputfileName);
$xmlInput = simplexml_load_string(utf8_encode($fichier));

```

Have you an idea to open this file ?