PHP generates non-repeating strings
Use the timestamp as the original string and randomly generate five characters Insert randomly into any position to generate a new string, ensuring no duplication.
The code is as follows:
##
function rand($len)
{
$chars='ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz';
$string=time();
for(;$len>=1;$len--)
{
$position=rand()%strlen($chars);
$position2=rand()%strlen($string);
$string=substr_replace($string,substr($chars,$position,1),$position2,0);
}
return $string;
}The above is the detailed content of php generates unique strings. For more information, please follow other related articles on the PHP Chinese website!
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