PHP DOMDocument：loadHTMLFile窒息一个神秘的角色：RS

Using php's DOMDocument->LoadHTMLFile('test.html'); keeps on returning an error to me, reporting for an error in the content at line 36. Deleting character after character, it turns out it's an apparently empty space that was the culprit. Copying/pasting that sentence in another editor (Editra), showed a strange RS character. Using php's DOMDocument->LoadHTMLFile('test.htm