How can I generate a non-fixed length large random number? (e.g. within the range of MySQL's bigint). The mt_rand() function does not support such large numbers.
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llanato
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user3099705
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Are you running a 32bit PHP or a 64-bit PHP? – Mark Baker Jan 21 '15 at 15:53
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So what is it, `non-fixed/limitless` or `limited by mysql bigint range` ? ;-) – VolkerK Jan 21 '15 at 15:58
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Maybe limited by mysql bigint range, maybe between 1 billion and 1 trillion, etc. – user3099705 Jan 21 '15 at 16:03
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Use multiple random functions:
const max_limit=10000;
a=mt_rand()*max_limit*max_limit + mt_rand()*max_limit + mt_rand();
Arashium
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MySQL's BIGINT is 8 bytes large. Let's asume an unsigned BIGINT.
echo unpack('H*', mcrypt_create_iv(8))[1];
or for php versions < 5.4 that do not support function array dereferencing
echo current(unpack('H*', mcrypt_create_iv(8)));
see:
http://docs.php.net/function.mcrypt-create-iv
http://docs.php.net/function.pack
VolkerK
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