How can references be used to change the condition of a while loop in PHP?

When a reference is used in a while loop condition, any changes made to the referenced variable within the loop will affect the loop condition. This can be useful for dynamically changing the condition based on certain criteria within the loop. To implement this, simply pass the variable by reference in the while loop condition and update it within the loop as needed. 

```php
$count = 0;

while ($count < 5) {
    echo $count . "\n";
    $count++;
}
```

In this example, the while loop will run as long as the `$count` variable is less than 5.

Keywords

PHP references while loop condition modification

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