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Author vstinner
Recipients christian.heimes, vstinner
Date 2016-06-08.22:13:09
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <1465423989.69.0.136358630043.issue27272@psf.upfronthosting.co.za>
In-reply-to
Content 
PHP uses GENERATE_SEED() to initialize mt_rand():
https://github.com/php/php-src/blob/1c295d4a9ac78fcc2f77d6695987598bb7abcb83/ext/standard/php_rand.h#L50

This macro uses: time() (resolution of 1 second), process identifier, php_combined_lcg()

php_combined_lcg() is seeded using: gettimeofday(), and getpid() or thread id in ZTS mode, gettimeofday() (called again after getpid()):
https://github.com/php/php-src/blob/1c295d4a9ac78fcc2f77d6695987598bb7abcb83/ext/standard/lcg.c#L55

mt_rand():
https://github.com/php/php-src/blob/1c295d4a9ac78fcc2f77d6695987598bb7abcb83/ext/standard/rand.c#L308
History
Date User Action Args
2016-06-08 22:13:09vstinnersetrecipients: + vstinner, christian.heimes
2016-06-08 22:13:09vstinnersetmessageid: <1465423989.69.0.136358630043.issue27272@psf.upfronthosting.co.za>
2016-06-08 22:13:09vstinnerlinkissue27272 messages
2016-06-08 22:13:09vstinnercreate