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PSR
Stands for PHP Standards Recommendation. It provides a coding standard for PHP and simplifies the coding process. Currently there are several accepted PSRs (PSR-1, 2, 3, 4, 6, 7, 11, 13, 16) that describe basic coding and style, as well as standardize logger, HTTP message and caching interfaces, and others.
| First released | 2009 |
| Developed by | PHP Framework Interop Group |
Interesting facts
A number of PSRs, including documentation standards, are in status of a draft and haven’t been accepted yet.