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## 2.1 Version

This manual covers versions up to 1.21 of JpGraph. A 2D graph plotting library for PHP4 and PHP5.

The library exists in two main tracks, the 1.x track and the 2.x track. From a functional perspective both branches are equivalent. The difference is that 1.x is suitable for PHP4 and 2.x is suitable for PHP5.

Please make sure you use the correct version ! The 1.x version will not in general wotk on PHP5 installation and vice versa.

Even though the library is known to work with version of PHP prior to 4.3 and 5.1 respectively the library is not tested nor is it recommended to run with any older versions of PHP.

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