PHP 8.2 - null to string conversion deprecation issue in Zend_Validate_File_Extension

[pisc-software]

Zend_Validate_File_Extension needs a fix where a string variable is set to null in the class, throwing deprecation messages as on PHP 8.2 the null value is not automatically converted to an empty string anymore:

File: lib/Zend/Validate/File/Extension.php (135)
    /**
     * Sets the file extensions
     *
     * @param  string|array $extension The extensions to validate
     * @return Zend_Validate_File_Extension Provides a fluent interface
     */
    public function setExtension($extension)
    {
        // FIX: Set _extension to empty string instead of null
        $this->_extension = '';
        $this->addExtension($extension);
        return $this;
    }

[hungtrinh]

@pisc-software please feel free to make PR

[develart-projects]

I'm on it. You can't simply change to empty string, because there is null comparsion in the code.

[develart-projects]

Validator is screwed up a bit more than expected, by previous commits. Once setting string, then expecting array, then null. I'll revert recent updates and fix the problem itself, as described.

[develart-projects]

Started to rework the validator, then backed up and kept simplest approach.
#364

[develart-projects]

1.23.0 released

[pisc-software]

Thank you for the effort.