Generate a random string A-Z, a-z, 0-9 in PHP

[arnlweb]

Random string a to z

Code: Select all

// Start here (a-z)

$length = 1;

$randomletter = substr(str_shuffle("abcdefghijklmnopqrstuvwxyz"), 0, $length);

echo $randomletter;

// End here

Random string 0 to 9

Code: Select all

// Start here (0-9)

$length = 1;

$randomletter = substr(str_shuffle("0123456789"), 0, $length);

echo $randomletter;

// End here

Random string A to Z, a to z and 0 to 9

Code: Select all

// Start here

$length = 1;

$randomletter = substr(str_shuffle("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"), 0, $length);

echo $randomletter;

// End here

You can use a function like this.

Code: Select all

function generaterandomletter($length = 1) {

return substr(str_shuffle("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"), 0, $length);

}

// print the random string.

echo generaterandomletter();

Thanks.

[uchedestiny]

Thanks! I like this.

But have you checked for duplicate?

Assuming I run it for 50 - 100,000 times, won't there be duplicate?

[arnlweb]

No, do not test it. Is there anything I can do to help?