Override Third Party Extension in Magento 2

Question

How can I Override a Third Party Extension? The Path for the Extension is: app/code/extension_company/extension/model/file.php

Can I Override this php File by my custom Theme?

Answer 1

Yes,You can use plugin at here.

<?xml version="1.0" ?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="extension_company/extension/model/file">
        <plugin disabled="false" name="overrider_the_third_part_file" sortOrder="10" type="[VendorName]\[ModuleName]\Plugin\FILE"/>
    </type>
</config>

Use after,before,around method basic of your requirement.

Answer 2

You can override the php file in your own custom module. You can create your module and override the php file like this:

app/code/Vendor/module_name/model/classname.php

You also need to create di.xml file at the following location wherein you will set the preference for your Class in classname.php

app/code/Vendor/module_name/etc/di.xml

di.xml example

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
  <preference for="Magento\ModuleName\Model\Classname" type="Vendor\ModuleName\Model\Classname" />
</config>

classname.php example

<?php
namespace Vendor\ModuleName\Model;

class Classname extends \Magento\ModuleName\Model\Classname
{
   //your code goes here.
}