? ???? PHP? ?? ???? ?? ?? ?????. ???? ?? ???? ??????

??? ??? ???? ??? ??? ??? ? ????. ? ??? ??? ???? min ? max ?? ?? ??? ??? ?? ?? ?? ??? ?????. ??? ? ??? ??? ??? ??? ??? ?????. 2?? ??, 3?? ?? ? ?? ??? ??? ? ????.

?? ????? ?? ?? ??

? ??, ????? ??, ????? ??? ?

??? ?? ??? ??? ?? ?? ?????. ??? ???? ??? ?? ??? ????.

?? ??? ??

?? ?? ??? ???? ??? ??? ?? ?? ?????.

• ??? ?? rand() ??, ??? ?? rand() ??:?? ??? ???? ??? ?????. ??? min? max? ???? ?? ??? ??? ?????.
• mt_rand() ??: ? ??? rand()? ?????. mt_rand()? mt? Mersenne Twister? ?????. mt_rand() ??? ?? ????? ?? ?? ?????. rand() ??? ????? ?? ??? ?????. ?? ??? ?? ?? ???????. ?? ?? ?? ???? ?? ?????. ??? ????? ??? ??? ?????.
• getrandmax() ??: ? ???? ??? ?? ??? ??? ???? ? ? ??? ??? ?? ??? ?????.
• mt_getrandmax() ??: getrandmax() ??? ???? ??? ?? ??? ?????. ???? mt? ?? ?? ????? Mersenne Twister? ?????.
• srand(seed) ??: ? ??? ???? ?? ?? ? ??? ?? ???? ??? ?? ?? ?????.
• mt_srand(seed): ? ??? srand() ??? ???? ? ??? ??? ?? ?? ?? ???? ?????.

??? ? ?? ??? ?? ??? ?????.

1. ??() ??

??:

rand()

?:

<?php
// program to generate random integer value
echo '<br>'.'Following are the different random values';
echo '<hr/>';
echo '<br>'. rand();
echo '<hr/>';
echo '<br>'. rand();
echo '<hr/>';
echo '<br>'. rand();
?>

??:

2. ??? ?? ?? rand() ??

? ??? rand() ??? ??? ?????.

??:

rand(min, max);

??? min? ??? ????? ?? ?? ?? ?? ????, max? ??? ????? ?? ?? ?? ?? ?????.

?? min? ???? 0?? max? ???? getrandmax() ?? ????. ??? ?? ??? ?? ?????.

?:

<?php
// program to generate random integer value
echo 'Following are the different random values within ranges min and max';
echo '<hr/>';
echo '<br> Range : 1 to 100 ----> '. rand(1,100);
echo '<hr/>';
echo '<br> Range 5 to 25 ---->'. rand(5, 25);
echo '<hr/>';
echo '<br>Range 10000 to 50000 --->'. rand(10000, 50000);
?>

??:

3. mt_rand() ??

??:

int mt_rand(min, max)

??? min? ??? ??? ?? ?? ??? ????, max? ??? ??? ?? ?? ??? ?????. min? ???? 0?? max? ???? ??? ?? ?? ????. ?? ??? ?????.

?:

<?php
// program to generate random integer value
echo 'Following are the different random values using mt_rand()';
echo '<hr/>';
echo '<br> Range : 1 to 100 ----> '. mt_rand(1,100);
echo '<hr/>';
echo '<br> Range 5 to 25 ---->'. mt_rand(5, 25);
echo '<hr/>';
echo '<br>Range 9 to 19 --->'. mt_rand(9, 19);
?>

??:

4. getrandmax() ??

??:

mt_getrandmax();

? ??? ?? ?? ?????

?:

<?php
// program to generate random integer values
//using getrandmax() function
echo 'Random number using getrandmax() function';
echo '<hr/>';
echo(getrandmax());
echo '<hr>';
?>

??:

5. mt_getrandommax() ??

??:

mt_getrandmax();

? ??? ?? ?? ?????.

?:

<?php
// program to generate random integer values
//using mt_getrandmax() function
echo 'random number using mt_getrandmax() function';
echo '<hr/>';
echo(mt_getrandmax());
?>

??:

6. srand() ??

??:

srand(seed);

??? ??? ?? ?? ? ??? ???? ???? ????.

?:

<?php
// program to generate random integer value
echo 'example using srand';
echo '<br>'. srand(3);
echo(rand(1, 5));
echo '<hr>';
echo 'example using srand';
echo '<br>'. srand(2);
echo(rand(1, 5));
?>

??:

7. mt_srand() Function

Example:

<?php
// program to generate random integer value using mt_srand() function
echo 'example using mt_srand';
echo '<hr>';
mt_srand(5);
echo mt_rand(1,5);
?>

Output:

Generation Integers

In the following example we have used rand(),rand(min,max) and mt_rand().

Code:

<?php
// program to generate random integer value
echo 'Following are the different random values';
echo '<br> Any random number ---->'. rand();
echo '<br> Any random number ---->'. rand();
echo '<hr>';
// random number with range
echo 'Following are the different random values within a range ';
echo '<br> Any random number within the range from 0 to 9----> '. rand(0,9);
echo '<br>Any random number within the range from 1000? to 9999 ---->'. rand(1000,9999);
echo '<hr>';
// random number with range
echo 'Following are the different random values using mt_rand() ';
echo '<br> Using mt_rand()---->'. mt_rand(1000,9999);
echo '<br> Using mt_rand()---->'. mt_rand(100,999);
?>

Output:

Generation Floating-Point Numbers

Floating-point numbers represent a number with decimals that are of the type float. Examples – 10.0, 8.12, 6.23e-5, 2.345, 2.98e+10 and more.

Code:

<?php
function fun($min, $max) {
$square_root = sqrt(4);
return mt_rand($min * $square_root, $max * $square_root) /? 100;
}
echo 'Program to display floating point numbers ';
echo '<hr>';
echo "<br>".fun(1, 10, 2);
?>

Output:

Conclusion

In this article, we learned about various functions used to generate a random number in PHP. These functions are explained with sample examples. Hope this article is found useful to anyone who wants to learn a random number generator in PHP.

? ??? PHP? ?? ???? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!