What are the key considerations when using a for loop in PHP, and how does the syntax work for a for loop in PHP?

When using a for loop in PHP, it is important to consider the initial value, condition, and increment/decrement of the loop variable. The syntax for a for loop in PHP is as follows:

```php
for (initial value; condition; increment/decrement) {
    // code to be executed
}
```

In this syntax, the initial value is where the loop variable starts, the condition determines when the loop should stop, and the increment/decrement specifies how the loop variable should be updated after each iteration.