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Editorial Team
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Asked: 2026-05-15T03:47:33+00:00

I have the following google chart code that im working with as an example:

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I have the following google chart code that im working with as an example:

Type: Line
Dimensions: 270x150
283,285,295,204,340,#41C0E4
64,120,130,170,175,180,#3962C2
1,2,5,12,28,34,#005E91
Bottom Label: test

The following is the URL which generates the image below

https://chart.apis.google.com/chart?chs=270×150&cht=lc&chtt=&chd=s:zz1l9,LWXffg,AABCFG&chco=41C0E4,3962C2,005E91&chxl=0:|test|&chxt=x

alt text

My question is that i dont see the actual data in the url, but i see this

chd=s:zz1l9,LWXffg,AABCFG

That looks like serialized data, but im wondering how exactly that works, or how to encode/decode that to make the input of chart data dynamic via php.

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1 Answer

  1. Editorial Team

    It’s the simple encoding format.

    See about it here in the documentation.

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