获取相同的mt_rand值

Question

This is the first time I ask a question here, I apologise if my English is bad or i did something wrong here. I would ask a simple question, how can I get the same value of mt_rand? Example:

 $array = [ array('colour' => 'Green', 'type' => 'BMW'), array('colour' => 'Blue', 'type' => 'Toyota') ]; $random = $array[mt_rand(0, count($array) - 1]; echo 'That car is ' . $random['type'] . ' with colour ' . $random['colour']; 

But sometimes, it gives the result 'That car is BMW with colour Blue'. I want it gives the right colour when i echo it, like if the car is BMW, the colour is Green, and if the car is Toyota, it gives colour Blue. I hope you can understand what i meant. Thanks for reading this...

Answer 1

It's easier to use array_rand to get a random key from your array.

Example

$cars = [
    [
        'colour' => 'Green',
        'type' => 'BMW'
    ], 
    [
        'colour' => 'Blue',
        'type' => 'Toyota'
    ]
];

$randomCarKey = array_rand($cars);
// will be one of 0,1

$randomCar = $cars[$randomCarKey];

print 'That car is ' . $randomCar['type'] . ' with colour ' . $randomCar['colour'];

Will output

That car is BMW with colour Green

If you prefer mt_rand here's how you can get a random key, and use it

$randomKey = mt_rand(0, count($cars) - 1);
$randomCar = $cars[$randomCarKey];

print PHP_EOL . 'That car is ' . $randomCar['type'] . ' with colour ' . $randomCar['colour'];

Will output

That car is Toyota with colour Blue