Random Password Generator /

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Random Password Documentation

Requires PHP 5.4.0 or later


string we_randomPassword( [ int length [, string type [, mixed charsets ]]] )

The function was written to create strong passwords with a decent level of control over the final output. You can specify length and type of the password. It is also possible to create a custom password type.

To achieve control over the output character sets are used. From each set an equal amount of characters is selected. Also each character in a set has to be used, before it can be selected again. This ensures that all character types are used and repeating characters are kept to a minimum.

The function returns a UTF-8 encoded string. Characters for a custom type must be UTF-8 encoded.

Table: function parameters

parameter description
length password length (default: 8)
type password type (default: alphanumeric)
charsets custom character sets (only for type "custom")

Table: password types

type character sets
alphanumeric (default) ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz 0123456789
reduced (=alphanumeric without 0oO9g1lI) ABCDEFGHJKLMNPQRSTUVWXYZ abcdefghijkmnpqrstuvwxyz 2345678
alphabetical ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz
ascii ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz 0123456789 ~`!@#$%^&*()-_=+\⎮[]{};:'",.<>/?
latin1 ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝ àáâãäåæçèéêëìíîïðñòóôõöøùúûüýþÿ 0123456789 ~`!@#$%^&*()-_=+\⎮[]{};:'",.<>/?
hexadecimal 0123456789 abcdef
numeric 0123456789
custom user defined (UTF-8 encoded)

Although this function should create a strong password, there is no 100% guarantee. There is still a small chance that this function creates a password like: ABCabc123. To test the strength of a generated password, you can use for example cracklib.


require_once 'randompassword.php';

// Default behaviour (no parameters), e.g. 3pHJXd4l
$password1 = we_randomPassword();

// Password with length 8 and type ascii, e.g. 7w$6aDR~
$password2 = we_randomPassword(8, 'ascii');

// Password with length 6 and only lowercase letters, e.g. fkslhu
$password4 = we_randomPassword(6, 'custom', 'abcdefghijklmnopqrstuvwxyz');

// Password with length 16 and only uppercase letters + numbers, e.g. 71H5N92GJK0I6E3A
$password5 = we_randomPassword(16, 'custom', ['ABCDEFGHIJKLMNOPQRSTUVWXYZ', '0123456789']);


The package is released under the MIT License