Generate Random Unique Key Php
Re: generate unique codes
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Jun 12, 2012 04:30 PMgerrylowryLINK
Generate Random Unique Key Php Login
@ dofoo
- A unique user ID can be created in PHP using the uniqid function. This function has two parameters you can set. The first is the prefix, which is what will be appended to the beginning of each ID. The second is moreentropy.
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- The uniqid( ) function in PHP is an inbuilt function which is used to generate a unique ID based on the current time in microseconds (micro time). By default, it returns a 13 character long unique string.
You can use uniqid to generate unique IDs. Look at the comments for PHP implementations of UUID (universally unique identifier) generation as well. Look at the comments for PHP implementations of UUID (universally unique identifier) generation as well. Jul 10, 2018 php sessionstart; $id=sessionid; if you just like to create a unique Id and store it in a session, use unique id, $SESSION'someid’=uniqid; this creates.
dofoo
pretty sure that I generate uinique codes
FWIW, if you requre 'unique codes', 'pretty sure' is insufficient.
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i've run variations* on code downloaded from the article http://www.codeproject.com/Articles/14403/Generating-Unique-Keys-in-Net suggested by RameshRajendran above.
N.B.: ¡ almost certainly, duplicates ARE produced !
N.B.: ¡ my investigation is not complete !
in one test, my first duplicate was encountered after 2 379 101 (two million iterations).
in many tests, i run out of memory ('System.OutOfMemoryException') before encountering a duplicate.
dofoo, i've not tested your method for duplicates; your method should produce more duplicates because it's the hexadecimal value of an Int32 .. the method from
to me, it appears the above string is the major influence on Altaf Al-Amin's algorithm .. you have (26 + 26 + 10) characters for each of eight character positions, i.e., 62 to the eight power .. a very large number but nevertheless a finite number.
WHENEVER one is dealing with finite combinations, if unique values are required, it is prudent to check for duplicates!
Generate Random Unique Key Php Code
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Php Generate Unique Id
* code variation (this variation has imperfections, especially in the catch block):