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How to generate a random string in PHP?

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< 1 min read

To generate a random string in PHP, you can use the random_bytes function to generate a random sequence of bytes, and then use the bin2hex function to convert the bytes to a hexadecimal string.

Here’s an example:

$bytes = random_bytes(16);
$random_string = bin2hex($bytes);

// $random_string is now a 32-character hexadecimal string

You can also use the openssl_random_pseudo_bytes function to generate the random bytes, which is more secure but may be slower:

$bytes = openssl_random_pseudo_bytes(16);
$random_string = bin2hex($bytes);

Alternatively, you can use the mt_rand function to generate a random integer, and then use the base_convert function to convert it to a base-62 string. This method is less secure but faster:

$random_int = mt_rand(0, 999999999999);
$random_string = base_convert($random_int, 10, 62);

// $random_string is now a 12-character base-62 string

You can also use the str_shuffle function to shuffle the characters of a given string:

$characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$random_string = str_shuffle($characters);

// $random_string is now a shuffled version of the $characters string

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