a free php charts that can save the result as an image

hi
i need to create a pdf report on cron job, and the report should include some charts. i used client side charts, but they will not suit for that.
is there a free library that have a variey of charts and can save the results as images to insert into the pdf reports?

best regards
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derridaAsked:
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Loganathan NatarajanLAMP DeveloperCommented:
I use Jpgraph for my project purpose and then it can be saved to dir and to pdf.
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derridaAuthor Commented:
hi
thanks i am checking it and it looks good. i tested their example, and it works, but when i try to display it in a pdf ( i use mpdf ) i get an error that the image cannot be displayed.

how do you insert it into a pdf?
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Loganathan NatarajanLAMP DeveloperCommented:
how do you insert it into a pdf?

For that you need to embed the saved img graph in the pdf library as per @Frank Pennock link
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