wp-includes/IXR/class-IXR-request.php:18PHP5 constructor.
$method$args function __construct($method, $args) { $this->method = $method; $this->args = $args; $this->xml = <<<EOD<?xml version="1.0"?><methodCall><methodName>{$this->method}</methodName><params> EOD; foreach ($this->args as $arg) { $this->xml .= '<param><value>'; $v = new IXR_Value($arg); $this->xml .= $v->getXml(); $this->xml .= "</value></param>\n"; } $this->xml .= '</params></methodCall>'; }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/IXR/class-IXR-request.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.