[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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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.