How does phpform receive parameters with fixed parameters?

When receiving an indefinite parameter, there are two fields, such as page and limit, which I want to receive, but other fields are not limited. How can I write this function to receive the form? When receiving an indefinite parameter, there are two fields, such as page and limit, which I want to receive, but other fields are not limited. How can I write this function to receive the form?

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When receiving an indefinite parameter, there are two fields, such as page and limit, which I want to receive, but other fields are not limited. How can I write this function to receive the form?

UseIsset ()Determine if other fields exist

If (isset ($ _ POST ['page']) & $ _ POST ['page'])
{
# Code
}

Traverse $ _ POST with foreach