[WooCommerce 3.0] Require minimum password length for account registration, password update, and password resets

wc-min-pass-chars-req.php

add_action('woocommerce_process_registration_errors', 'validatePasswordReg', 10, 2 );

function validatePasswordReg( $errors, $user ) {
	// change value here to set minimum required password chars
    if(strlen($_POST['password']) < 15  ) {
    	$errors->add( 'woocommerce_password_error', __( 'Password must be at least 15 characters long.' ) );
    }
    // adding ability to set maximum allowed password chars -- uncomment the following two (2) lines to enable that
    //elseif (strlen($_POST['password']) > 16 )
     	//$errors->add( 'woocommerce_password_error', __( 'Password must be shorter than 16 characters.' ) );
    return $errors;
	}

add_action('woocommerce_save_account_details_errors', 'validateProfileUpdate', 10, 2 );

function validateProfileUpdate( $errors, $user ) {
	// change value here to set minimum required password chars
    if(strlen($_POST['password_2']) < 15  ) {
    	$errors->add( 'woocommerce_password_error', __( 'Password must be at least 15 characters long.' ) );
	}
	// adding ability to set maximum allowed password chars -- uncomment the following two (2) lines to enable that
    //elseif (strlen($_POST['password_2']) > 16 )
     	//$errors->add( 'woocommerce_password_error', __( 'Password must be shorter than 16 characters.' ) );
    return $errors;
	}

add_action('woocommerce_password_reset', 'validatePasswordReset', 10, 2 );

function validatePasswordReset( $errors, $user ) {
	// change value here to set minimum required password chars -- uncomment the following two (2) lines to enable that
    if(strlen($_POST['password_3']) < 15  ) {
    	$errors->add( 'woocommerce_password_error', __( 'Password must be at least 15 characters long.' ) );
	}
	// adding ability to set maximum allowed password chars -- uncomment the following two (2) lines to enable that
    //elseif (strlen($_POST['password_3']) > 16 )
     	//$errors->add( 'woocommerce_password_error', __( 'Password must be shorter than 16 characters.' ) );
    return $errors;
	}


add_action( 'woocommerce_after_checkout_validation', 'minPassCharsCheckout', 10, 2 );
function minPassCharsCheckout( $user ) {
	// change value here to set minimum required password chars on checkout page account registration
    if ( strlen( $_POST['account_password'] ) < 15  ) {
    	wc_add_notice( __( 'Password must be at least 15 characters long.', 'woocommerce' ), 'error' );
	}
}
						  
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This is great. Thanks. Are you adding this to the theme functions.php file?

Yes, thats my question too. Where to add this code?

Yes, add this to the theme's functions.php file or via a plugin that allows code to be added, like https://wordpress.org/plugins/code-snippets/ plugin

Cheers!

thank you...

not working. still not able to set a password with less than 12 chars. Doesnt matter if i change password, use forget password or create new account. nothing working. i use flatsome theme.

@bobafett92. this is to create a minimum requirement. you would need to change the logic to do what you want.