I want to create an activation number for user registration in PHP
Is rand() Secure ? If not what else I can use ?
My PHP version : 5.3
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6`Caution This function does not generate cryptographically secure values, and should not be used for cryptographic purposes. If you need a cryptographically secure value, consider using random_int(), random_bytes(), or openssl_random_pseudo_bytes() instead.` – Mark Baker Aug 12 '16 at 18:09
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1rand is about as random as rolling a dice – Mark Baker Aug 12 '16 at 18:09
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Theres a function here to make a unique string which should work for your purposes: http://stackoverflow.com/questions/4356289/php-random-string-generator/31107425#31107425 – SilicaGel Aug 12 '16 at 18:10
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Although this function(random_int()) was added to PHP in PHP 7.0 @MarkBaker – M4HdYaR Aug 12 '16 at 18:10
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@SilicaGel That function uses PHP 7.0 random_int() – M4HdYaR Aug 12 '16 at 18:12
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I believe it works on php 5.3 using the library mentioned in the comments.. For PHP 5.x, depends on https://github.com/paragonie/random_compat – SilicaGel Aug 12 '16 at 18:18
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As long as you want it for that purpose only, it is safe. – revo Aug 12 '16 at 18:57
