Add configurable charencoding property with getter/setter methods

[Copilot]

The $charencoding property was hardcoded to true with no public API to change it, preventing users from disabling automatic XML entity encoding when needed.

Changes

• nusoap_base: Added getCharencoding() and setCharencoding($charencoding) public methods
• nusoap_client: Propagate charencoding setting to wsdl objects in constructor and loadWSDL()
• Tests: Added coverage for getter/setter and verification that expandEntities() respects the setting

Usage

$client = new nusoap_client('http://example.com/soap');
$client->setCharencoding(false);  // Disable XML entity encoding

// With charencoding=false, special characters pass through unchanged
$client->expandEntities('<test> & "value"');  // Returns: <test> & "value"

// With charencoding=true (default), entities are encoded
$client->setCharencoding(true);
$client->expandEntities('<test> & "value"');  // Returns: &lt;test&gt; &amp; &quot;value&quot;

Default remains true for backward compatibility.

Warning

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• https://api.github.com/repos/contributte/tester/zipball/d7db5a9b2b76910805ce191fa96b59d51c3b4dc1
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If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

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This section details on the original issue you should resolve

<issue_title>Charencoding always true</issue_title>
<issue_description>The variable $charencoding is always true. I saw that is a private declaration. I need $charencoding to be false for my string parameters.
On my project I modified the nusoap_base (I added setCharencoding and getCharencoding), nusoap_client (construct and loadWsdl to setCharencoding to nusoap client object and to $this->wsdl object) .</issue_description>

<agent_instructions>Try to resolve it</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes Charencoding always true #103

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