Sure, here's an example of a simple web page using PHP:

```php






$message";
?>


```

This code defines a variable called `$message` and sets its value to "Hello, world!". It then uses the `echo` statement to output the value of the variable inside an HTML heading (`
`). When the page is loaded in a web browser, it will display the heading with the message "Hello, world!".
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence