Understanding VBScript - php

Question

I have a VBScript that I`m converting to PHP, I hae some part that I don`t understand and don`t know the output of ... Also if possible, provide me with a similar method in HTML/PHP
TextBox1.Value = 1#
txtTurnoverIncl = TextBox1
Format(CDbl(txtTurnoverExcl.Text) * _
CDbl(txtRoyalty.Text) / 100, "#,##0.00")
If txtTurnoverExcl.Text <> "" Then
Format(Round(.Text * 14 / 114, 2), "#,##0.00")
TextBox1 = Now()
TextBox3 = Date
TextBox4 = Format(MyDate, "dddd")
And this function:
Private Function SumCashUp() As Double
Dim i As Long
Dim tmp As Double
For i = 10 To 12
With Me.Controls("TextBox" & i)
If IsNumeric(.Text) Then
tmp = tmp + CDbl(.Text)
End If
End With
Next i
SumCashUp = tmp
End Function
I guess thats all.

Answer 1

TextBox1.Value = 1# - Assign the value 1 in format Double to the textbox control. (thanks MikeD)
txtTurnoverIncl = TextBox1 - Assigning reference to the control TextBox to variable called txtTurnoverIncl
CDbl(txtTurnoverExcl.Text) - Convert the text inside the textbox txtTurnoverExcl to double i.e. numeric value with decimal point e.g. 2.6 - this is useful if you want to perform mathematical operations on the value for example.
Format(..., "#,##0.00") - Format number to look like this: 2.60 or 8.25 i.e. with two digits after decimal point.
Round(.Text * 14 / 114, 2) - The .Text means you're inside With (somecontrol) block, so it's actually somecontrol.Text i.e. taking the Text of the control. Round function will round the number for example Round(662.791, 2) will return 662.79 and Round(662.796, 2) will return 662.8
Now() - Returns the current date and time on the machine where the code is executing
Date or Date() - Like Now() but only with the date, time will be 00:00:00
Format(MyDate, "dddd") - Get name of the day of week of MyDate, according to the Culture on the machine. For example for Hebrew culture it will return יום שלישי for English culture it will return Tuesday. In general, Format() given date and string will Format the date according to the string e.g. Format(Now(), "dd/MM/yyyy") will return 14/12/2010

Answer 2

The last function returns the sum of the values of the textboxes named "Textbox10", "Textbox11", and "Textbox12" in a pretty complicated way. I guess in PHP you would do something like this (assuming you are POSTing a form):
function sumCashUp() {
return (double) $_POST['Textbox10'] + (double) $_POST['Textbox11'] + (double) $_POST['Textbox12'];
}

Answer 3

first of all it would be better to analyze what the whole thing is doing (semantically) rather than looking at sequences of code. So the remainder of this post is a bit speculative ....
There are a couple of textboxes displayed on the screen
TextBox1 ... initialized with value 1(double), later containing current time (now()) (imho a sin in itself - brrrr - hope there is good business logic explanation for this)
TextBox3 ... initialized with the current date
TextBox4 ... initialized with "something we don't know" - hopefully a date (MyDate), and formated as Weekday ("dddd")
TextBox10 - TextBox12 ... seem to be used to calculate a variable SumCashUp
we have some more variables which may be textboxes as well (as sometimes we see a .Text added in the code)
txtTurnoverIncl
txtTurnoverExcl
txtRoyalty
SumCashUp
and a code fragment that calculates a 14% margin from a Gross (*14/114), rounds and formats the result ... and we have no clue about where this result is used. We can speculate that it may be another form field (because of .Text) - maybe txtRoyalty - but we don't know.
Basically all the code fragments are about putting values into textboxes displayed on the screen and/or using the values of that text boxes to compute something (like the SumCashUp or a 14% GM).
So I guess the path to the solution must be
get the source layout of textboxes
understand the business logic
create a HTML page containing a form with similar objects (textboxes, a submit button, etc.)
write PHP code that implements the business logic - most probably as a reaction to a POST event triggered by a Submit button
You already received a couple of code fragments, but one needs to put this into a greater context, otherwise the code blocks won't help.