PHP Google pagerank chart generator

November 3rd, 2005 by

paolo

Author: Paolo Ardoino
PageRank relies on the uniquely democratic nature of the web by using its vast link structure as an indicator of an individual page’s value. In essence, Google interprets a link from page A to page B as a vote, by page A, for page B. But, Google looks at more than the sheer volume of votes, or links a page receives; it also analyzes the page that casts the vote. Votes cast by pages that are themselves “important” weigh more heavily and help to make other pages “important”. by Google

PR(A) = (1 – d) + d (PR(T1) / C(T1) + … + PR(Tn) / C(Tn))

PR(A): Pagerank of a page A

d = 0.85

PR(Ti): Pagerank of page Ti which links to A

C(Ti): number of outbound links on page Ti, which has given the link Average Links per Page = 40

PR	Start	For PR4	For PR5	For PR6	For PR7	For PR8
PR 1	6	2050.5	11278	62030	341163	1876389
PR 2	30	384.45	2115	11631	63968	351823
PR 3	166	69.90	384.49	2115	11631	63968
PR 4	915	12.70	69.88	384.37	2114	11627
PR 5	5033	2.31	12.70	69.88	384.36	2114
PR 6	27681	0.42	2.31	12.70	69.88	384.37
PR 7	152244	0.07	0.42	2.31	12.70	69.89
PR 8	837379	0.01	0.07	0.42	2.31	12.71
PR 9	4605367	0.00	0.01	0.07	0.42	2.31
PR 10	25329516	0.0005	0.003	0.014	0.076	0.42

The following PHP script generates a simple chart that could be usefull to know how many links are needed
to increase pagerank; it takes script taking average links per page as parameter
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