PHP three ways to generate random numbers _php tutorial

Three ways to generate random numbers in PHP

How do I generate a random number between 1-10 in PHP?

Example 1, use the shuffle function to generate a random number.

1

2	$arr =range (1,10);

3	Shuffle ($arr);

4	foreach ($arr as $values)

5

{

6	echo $values. " ";

7

}

8

?>

Example 2, use the Array_unique function to generate a random number.

1

2	$arr =array ();

3	while (count ($arr) <10)

4

{

5	$arr []=rand (1,10);

6	$arr =array_unique ($arr);

7

}

8	echo Implode ("", $arr);

9

?>

Example 3, using the Array_flip function to generate random numbers, you can remove duplicate values.

01

02	$arr =array ();

03	$count 1=0;

04	$count = 0;

05	$return = Array ();

06	while ($count < 10)

07

{

08	$return [] = Mt_rand (1, 10);

09	$return = Array_flip (Array_flip ($return));

10	$count = count ($return);

11	}//www.jbxue.com

12	foreach ($return as $value)

13

{

14	echo $value. " ";

15

}

16

echo " ";

17	$arr =array_values ($return);//Get the value of the array

18	foreach ($arr as $key)

19	echo $key. " ";

20

?>

PHP Random number Generation Function Example

01

02	function RANDPW ($len =8, $format = ' all ') {

03	$is _ABC = $is _numer = 0;

04	$password = $tmp = ";

05	Switch ($format) {

06	Case ' all ':

07	$chars = ' ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 ';

08

Break

09	Case ' CHAR ':

10	$chars = ' abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz ';

11

Break

12	Case ' number ':

13	$chars = ' 0123456789 ';

14

Break

15

Default:

16	$chars = ' ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789 ';

17

Break

18	}//Www.jbxue.com

19	Mt_srand (Double) Microtime () *1000000*getmypid ());

20	while (strlen ($password) < $len) {

21st	$tmp =substr ($chars, (Mt_rand ()%strlen ($chars)), 1);

22	if (($is _numer <> 1 && is_numeric ($tmp) && $tmp > 0) | | $format = = ' CHAR ') {

23	$is _numer = 1;

24

}

25	if ($is _abc <> 1 && preg_match ('/[a-za-z]/', $tmp)) | | $format = = ' number ') {

26	$is _abc = 1;

27

}

28	$password. = $tmp;

29

}

30	if ($is _numer <> 1 | | $is _abc <> 1 | | empty ($password)) {

31	$password = RANDPW ($len, $format);

32

}

33	return $password;

34

}

35	for ($i = 0; $i < $i + +) {

36	Echo RANDPW (8, ' number ');

37

echo " ";

38

}

http://www.bkjia.com/PHPjc/876453.html www.bkjia.com true http://www.bkjia.com/PHPjc/876453.html techarticle Three ways PHP generates random numbers how do I generate a random number between 1-10 in PHP? Example 1, use the shuffle function to generate a random number. 1. PHP 2 $arr =range (1,10); 3 Shuffle ($arr); 4 fo ...

