Why doesn't simplexml_load_string() understand a valid xml string?

Question

PHP

There is a line with xml, this is her wardump

string(941) "<?xml version="1.0"?><stats><breakdown date="2020-02-26"><responses>690292</responses><impressions>103203</impressions><revenue>142.1773</revenue></breakdown><breakdown date="2020-02-27"><responses>679646</responses><impressions>105329</impressions><revenue>60.7610</revenue></breakdown><breakdown date="2020-02-28"><responses>908865</responses><impressions>136551</impressions><revenue>68.2343</revenue></breakdown><breakdown date="2020-02-29"><responses>1268946</responses><impressions>248969</impressions><revenue>91.9452</revenue></breakdown><breakdown date="2020-03-01"><responses>926947</responses><impressions>195786</impressions><revenue>85.0645</revenue></breakdown><breakdown date="2020-03-02"><responses>528795</responses><impressions>67999</impressions><revenue>46.4714</revenue></breakdown><breakdown date="2020-03-03"><responses>903159</responses><impressions>124702</impressions><revenue>100.8346</revenue></breakdown></stats>"

function simplexml_load_string($this->xml); gives an error Error: Fatal error: Uncaught Exception: String could not be parsed as XML Xml checked by the validator everything is OK, help with the solution, google did not find it or googled it incorrectly, what flag is needed or what should I do first?
$this->xml = simplexml_load_string($this->xml);

Answer 1

Everything works

<?php
$string = '<?xml version="1.0"?><stats><breakdown date="2020-02-26"><responses>690292</responses><impressions>103203</impressions><revenue>142.1773</revenue></breakdown><breakdown date="2020-02-27"><responses>679646</responses><impressions>105329</impressions><revenue>60.7610</revenue></breakdown><breakdown date="2020-02-28"><responses>908865</responses><impressions>136551</impressions><revenue>68.2343</revenue></breakdown><breakdown date="2020-02-29"><responses>1268946</responses><impressions>248969</impressions><revenue>91.9452</revenue></breakdown><breakdown date="2020-03-01"><responses>926947</responses><impressions>195786</impressions><revenue>85.0645</revenue></breakdown><breakdown date="2020-03-02"><responses>528795</responses><impressions>67999</impressions><revenue>46.4714</revenue></breakdown><breakdown date="2020-03-03"><responses>903159</responses><impressions>124702</impressions><revenue>100.8346</revenue></breakdown></stats>';
$xml =  simplexml_load_string($string);
var_dump($xml->breakdown);

Answer 2

What is the decimal separator set on the system?
I somehow had a similar situation, and there was a comma separator, so the parser considered the numbers invalid, and, accordingly, could not recognize the string as valid.

Answer 3

Try to delete<?xml version="1.0"?>