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PHP rand() Randomosity Tester

+100 data
+1 +10 +100 +1K +10K +MAX
range: 1-10,000, data points: 454,863, groups: 50
High / Low / Range / Average
Frequency: 73 / 21 / 52 / 45.49
Rows: 627 / 1 / 626 / 200.00
Frequency
Rows
73
2
70
2
69
2
68
2
67
7
66
10
65
15
64
10
63
24
62
37
61
42
60
63
59
83
58
114
57
135
56
186
55
189
54
263
53
279
52
348
51
430
50
437
49
498
48
543
47
554
46
627
45
588
44
578
43
566
42
557
41
495
40
446
39
397
38
322
37
292
36
221
35
194
34
110
33
122
32
68
31
64
30
33
29
15
28
16
27
6
26
4
25
1
24
1
22
1
21
1

Test runs: 100Avg run : 0.000001 seconds Test time: 0.000055 seconds Data Save: 0.040892 seconds Test Tools: Restart test: Random range 1 to: 1 2 3 4 5 10 50 100 500 1K 5K 10K 50K 100K Random Generator Method: SQLite ORDER BY RANDOM() PHP rand() PHP mt_rand() PHP random_int() Back to top

About the Randomosity Tester

This page tests the frequency distribution and timing of random number generation via these methods:

Random number results are stored in a test table. The test table is defined as:

CREATE TABLE 'test' ( 'id' INTEGER PRIMARY KEY, 'frequency' INTEGER DEFAULT '0' );

The table is initialized by creating all rows with frequency = 0. The number of rows in the table is defined by the range setting. The current test is set to use range: 1 to 10,000.

For each random number chosen, the table is updated via:

UPDATE test SET frequency = frequency + 1 WHERE id = :random_number

For SQLite tests, results are individually generated via the SQL call:

SELECT id FROM test ORDER BY RANDOM() LIMIT 1;

Generate more random numbers by clicking a  +  number button to start a test run.

Each test run is limted to ~1.42 seconds.

A Frequency of Frequencies chart displays:

This site was created with Open Source software. Find out more on Github: randomosity-tester v0.2.2

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