wp_sms_sms_otp_length

The wp_sms_sms_otp_length filter allows you to customize the length of One-Time Passcodes (OTP) generated by WSMS.

Syntax

add_filter('wp_sms_sms_otp_length', 'your_callback');

Parameters

Parameter	Type	Description
$length	int	The OTP length (default varies)

Constraints

The length must be an integer between 2 and 10. Values outside this range will throw an InvalidArgumentException.

Min	Max	Default
2	10	4-6

Examples

Set 4-Digit OTP

add_filter('wp_sms_sms_otp_length', function($length) {
    return 4;
});

Set 6-Digit OTP

add_filter('wp_sms_sms_otp_length', function($length) {
    return 6;
});

Longer OTP for Higher Security

add_filter('wp_sms_sms_otp_length', function($length) {
    return 8;
});

Use Cases

• Match OTP length with banking/financial standards
• Shorter codes for better user experience
• Longer codes for higher security requirements
• Align with third-party integration requirements

Related

• OTP Rate Limiter - Limit OTP request frequency
• wp_sms_otp_generated - Action hook when OTP is generated