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phpstringrandomunique

PHP generate a unique string

I have an ID column in a table which stores the row ID number (auto increment), For example 1, 2, 3. I want to generated a random and unique string which could contain only numbers, alphabets and dash (-) and underscore (_). The length of string should be 4-6, and it should be unique. Can someone help me how to generate? thanks.

Solution

  • Use this - base_convert(mt_rand(0x1D39D3E06400000, 0x41C21CB8E0FFFFFF), 10, 36), but check new value against db.