What is the ratio between PHP and C learning time?

What is the ratio of learning time between PHP and C?
I just finished C, want to ask how much time after the next PHP, if you finish the C with 10 units of time, ah better add an HTML. Let me have the number
C PHP html
10
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This person and people are not the same, have good at surgery knife, have good at playing the keyboard;

This basic rule is:
Learning with difficulty----learning to slow down the task

C to 10 units of time, PHP about 6-8 units of time is enough;
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PHP is half C.
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That's what it says upstairs, but if you're proficient, you'll probably need 10 of them.
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Just finished the C 12-14
Did not learn C 7-8
Medium and above C 5-2

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