Hello Reader's, If you want to know about shuffle function in PHP then this article is helpful for you. Lets say you want to generate 100 numbers on a random basis, a good way would be to generate an array with the numbers in order, then shuffle it. So PHP offers you to use Shuffle like this:-

Something like this:

$arr = array();

for ($i=1;$i<=101;$i++) {
    $arr[] = $i;
}

shuffle($arr);

print_r($arr);
Output will look something like this:

Array
(
    [0] => 16
    [1] => 93
    [2] => 46
    [3] => 55
    [4] => 18
    [5] => 63
    [6] => 19
    [7] => 91
    [8] => 99
    [9] => 14
    [10] => 45
    [11] => 68
    [12] => 61
    [13] => 86
    [14] => 64
    [15] => 17
    [16] => 27
    [17] => 35
    [18] => 87
    [19] => 10
    [20] => 95
    [21] => 43
    [22] => 51
    [23] => 92
    [24] => 22
    [25] => 58
    [26] => 71
    [27] => 13
    [28] => 66
    [29] => 53
    [30] => 49
    [31] => 78
    [32] => 69
    [33] => 1
    [34] => 42
    [35] => 47
    [36] => 26
    [37] => 76
    [38] => 70
    [39] => 100
    [40] => 57
    [41] => 2
    [42] => 23
    [43] => 15
    [44] => 96
    [45] => 48
    [46] => 29
    [47] => 81
    [48] => 4
    [49] => 33
    [50] => 79
    [51] => 84
    [52] => 80
    [53] => 101
    [54] => 88
    [55] => 90
    [56] => 56
    [57] => 62
    [58] => 65
    [59] => 38
    [60] => 67
    [61] => 74
    [62] => 37
    [63] => 60
    [64] => 21
    [65] => 89
    [66] => 3
    [67] => 32
    [68] => 25
    [69] => 52
    [70] => 50
    [71] => 20
    [72] => 12
    [73] => 7
    [74] => 54
    [75] => 36
    [76] => 28
    [77] => 97
    [78] => 94
    [79] => 41
    [80] => 72
    [81] => 40
    [82] => 83
    [83] => 30
    [84] => 34
    [85] => 39
    [86] => 6
    [87] => 98
    [88] => 8
    [89] => 24
    [90] => 5
    [91] => 11
    [92] => 73
    [93] => 44
    [94] => 85
    [95] => 82
    [96] => 75
    [97] => 31
    [98] => 77
    [99] => 9
    [100] => 59
)

Now you have an array with the key of 100 and fill of random number that all are unique.