simplexml_load_string returns SimpleXmlElement, but with second parameter, intelephense thinks it returns a string · Issue #1792 · bmewburn/vscode-intelephense · GitHub
PHP + SimpleXML: Creating XML File Using simplexml_load_string Error
PHP 7 Script to Convert XML Report to JSON File Using simplexml_load_string() and json_encode() Method in Browser - Coding Deekshi
php5.6已经安装了xml,依然提示undefined function simplexml_load_string - SegmentFault 思否