rand() to generate random integer in PHP

Random integer generator

rand ( min,max);

min ,max : (Optional) Minimum and maximu value ( both inclusive ) of random integer to be generated ( both to be given )

We can generate random value by using rand() PHP. We can specify a range and the random value between those two ranges (inclusive) will be generated.

echo rand(); // Random Output 16513

echo rand(8,10); // Random Output starting from 8 to 10

This output is not cryptographically secure values , so for cryptographically secure value, consider using random_int(), random_bytes

Note that here we are generating a random number only. To get any random characters we can use arrays. The details on how to generate random characters is available here.

Random number of different length

We can create a script to generate random number of different length. Let us try to develop a script to print random number of 5 character length.

Here it is

<?Php
$no_of_digits=5;
$var='';
for($i=1; $i<=$no_of_digits; $i++){
$var .=rand(0,9);
}
echo "<br>Random Value = $var"; 
?>

Output is here

Random Value = 33369

Read here how to generate random string having alphabets and digits

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