Rand() function

The rand() function is used to generate random integer.

Syntax:

int rand ( void )
	or
	int rand ( int $min , int $max )

Parameter	Description	Required/Optional
min	Specifies the lowest number to returned.	Optional
max	Specifies the highest number to be returned.	Optional

Example1

<?php
echo "Get Random number by using rand() function: ".(rand() . "<br>");
echo "Get Random number by using rand() function: ".(rand() . "<br>");
echo "<b>"."Note: Refresh page to get another randome value"."<b>";
?>

Output:

Get Random number by using rand() function: 81627923
Get Random number by using rand() function: 1857469033
Note: Refresh page to get another randome value

Example2

<?php
echo "To get random number b/w (rand(10,100)): ".(rand(10,100));
echo "<br>"."<br>"."Note: Refresh page to get new random number";
?>

Output:

To get random number b/w (rand(10,100)): 15
Note: Refresh page to get new random number

Note: The mt_rand() math function is used to get a bet ter random value, and is 4 times faster than rand() function.

Example3

<?php
$r = array(0,0,0,0,0,0,0,0,0,0,0);
for ($i=0;$i<1000000;$i++) {
  $n = rand(0,100000);
  if ($n<=10) {
    $r[$n]++;
  }
}
print_r($r); 
?>

Output:

Array ( [0] => 7 [1] => 6 [2] => 9 [3] => 15 [4] => 10 [5] => 12 [6] => 10 [7] => 14 [8] => 9 [9] => 12 [10] => 13 )

Next TopicPHP Math

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Rand() function

Syntax:

Example1

Example2

Note: The mt_rand() math function is used to get a bet ter random value, and is 4 times faster than rand() function.

Example3

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