Preconditions

1. Magento 2.4.4 with PHP 8.1
2. PHP error reporting set to (E_ALL)

Steps to reproduce

1. Create a shipment with shipping label
2. In shipments grid, select the shipment and execute the Print Shipping Labels mass action

Expected result

Shipping label document opens.

Actual result

Error message is displayed:

Deprecated Functionality: Optional parameter $genNum declared before required parameter $factory is implicitly treated as a required parameter in /var/www/html/vendor/magento/zendframework1/library/Zend/Pdf/Element/Reference.php on line 91

The entrypoint to the error seems to be Zend_Pdf::parse.

When calling the match($userAgent, $server) function for mobile view in the module, it is giving error

PHP: 8.1
Magento: 2.4.4

PHP Fatal error: During inheritance of ArrayAccess: Uncaught Exception: Deprecated Functionality: Return type of Zend_Memory_Value::offsetExists($offset) should either be compatible with ArrayAccess::offsetExists(mixed $offset): bool, or the #[\\ReturnTypeWillChange] attribute should be used to temporarily suppress the notice in /var/www/html/vendor/magento/zendframework1/library/Zend/Memory/Value.php

Here's a patch :

--- a/library/Zend/Memory/Value.php
+++ b/library/Zend/Memory/Value.php
@@ -86,7 +86,7 @@
      * @param integer $offset
      * @return boolean
      */
-    public function offsetExists($offset)
+    public function offsetExists(mixed $offset): bool
     {
         return $offset >= 0  &&  $offset < strlen($this->_value);
     }
@@ -98,7 +98,7 @@
      * @param integer $offset
      * @return string
      */
-    public function offsetGet($offset)
+    public function offsetGet(mixed $offset): mixed
     {
         return $this->_value[$offset];
     }
@@ -110,7 +110,7 @@
      * @param integer $offset
      * @param string $char
      */
-    public function offsetSet($offset, $char)
+    public function offsetSet(mixed $offset, mixed $value): void
     {
         $this->_value[$offset] = $char;
 
@@ -126,7 +126,7 @@
      *
      * @param integer $offset
      */
-    public function offsetUnset($offset)
+    public function offsetUnset(mixed $offset): void
     {
         unset($this->_value[$offset]);

cf magento/magento2#35335

I am using PHP 8.1 and receiving the following error when sending mail.

Fatal error: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, Zend_Registry given in /var/www/ca/vendor/magento/zendframework1/library/Zend/Registry.php:207

The way array_key_exists has changed in php 8

For backward compatibility reasons, array_key_exists() will also return true if key is a property defined within an object given as array. This behaviour is deprecated as of PHP 7.4.0, and removed as of PHP 8.0.0.

Since the bit of code that is causing the TypeError was put into place to fix a previous bug, I have commented out the entire offsetExists() function in Registry.php so it would fall back to the function in ArrayObject.

Mail is now sending successfully with this function commented out.

Magento Admin Order Print Error

Exception #0 (Exception): Deprecated Functionality: iconv(): Passing null to parameter #3 ($string) of type string is deprecated in vendor/magento/zendframework1/library/Zend/Pdf/Resource/Font/Type0.php on line 241

Exception #0 (Exception): Notice: Undefined variable: line in ../vendor/magento/zendframework1/library/Zend/Config/Yaml.php on line 292

Why Magento not using latest laminas db component,why still Magento depending on this legacy orm?
Magento don't have time to convert this?
Or we can see this change in Magento 3.0 version?

When installing Magento 2.3.4 using composer (version 1.10.1 or higher) with the optimised autoloader flag results in this warning:

Deprecation Notice: Class Zend_Validate_Barcode_IntelligentMail located in ./vendor/magento/zendframework1/library/Zend/Validate/Barcode/Intelligentmail.php does not comply with psr-0 autoloading standard. It will not autoload anymore in Composer v2.0. in phar:///composer.phar/src/Composer/Autoload/ClassMapGenerator.php:201

FYI: composer version 1.10.0 started adding these warnings to prepare for composer 2.0 to be released soonish probably

If I have to guess, it's probably a case mismatch, the class is called Zend_Validate_Barcode_IntelligentMail, but the file is called Intelligentmail.php. Notice the different casing of the M letter.

Getting the below error for PHP 8.1.

1 exception(s):
Exception #0 (Exception): Deprecated Functionality: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in /var/www/html/project/vendor/magento/zendframework1/library/Zend/Log/Formatter/Simple.php on line 103

Exception #0 (Exception): Deprecated Functionality: str_replace(): Passing null to parameter #2 ($replace) of type array|string is deprecated in /var/www/html/project/vendor/magento/zendframework1/library/Zend/Log/Formatter/Simple.php on line 103
<pre>#1 str_replace() called at [vendor/magento/zendframework1/library/Zend/Log/Formatter/Simple.php:103]
#2 Zend_Log_Formatter_Simple->format() called at [vendor/magento/zendframework1/library/Zend/Log/Writer/Stream.php:131]

Hi,

Is there a security reason that prevents the header from receiving an underline name? example:
invalid_name

I am aware that it is not a good practice, and that "invalidName" should be adopted, but the partner API prevents this use.

https://github.com/magento/zf1/blob/master/library/Zend/Http/Client.php#L453