[php-list] No Array Entry vs Null Array Entry

[phplist_jsh]

Consider this statement related to Fields sent to PHP via an HTTP POST.

    $A = $_POST["FieldName"];

If the page did not have a form field with FiledName, the result is 
that $A is empty.

If the page DID have a form field with FieldName, but the field was 
left empty, then $A is empty also.

How should I test $_POST to distinguish between these two conditions.


James S. Huggins


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