PHP - Moved: Easy - Help Concatinating From Form :c)

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hello. i want to know what is *$ or +$ because i see it in many contact forms. also, what is the difference between these:
/^[A-Z]+[a-z]*$/
/^[A-Z]+[a-z]+$/
/^[A-Z]+[a-z]$/
/^[A-Z]+[a-z]/

also, which is the shortest and efficient method of checking somebodys name to be exactly "Name Surname" - "Green Trancer" ? in my form, i use
var filter = /^[A-Z]+[a-z]*$/;
var filter2 = /^[A-Z]+[a-z]+\s+[A-Z]+[a-z]+$/;
and then i check the name to be like filter or filter2.

how can i check that between the words to be exactly one space character ?

thank you very much.

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