如何从一个范围生成3个非重复随机数？ [重复]

Question

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• Generating random numbers without repeats 2 answers

Using PHP, how can I select 3 numbers from a numbers range, that don't repeat theirselves?

For example from a range 1 - 100, an answer may be 5, 32, 12, but not 5, 5, 93

Thank you

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Answer 1

Create array of numbers from 1 to 100:

$numbers = range(1, 100);

Shuffle all numbers:

shuffle($numbers);

Retrieve only 3 of them:

$randomNumbers = array_slice($numbers, 0, 3);