- Whats  sign at the beginning of my source file?
I have a PHP source file where  characters automatically got added in! I don't know from where they have come I'm not getting any parse errors but it results in weird behavior in the execution
- Type ï or Ï (i with Two Dots) — Keyboard Shortcuts, Alt Code
Learn what ï (i with two dots) means, how it differs from an umlaut, and easy ways to type it on Windows, Mac, iPhone, Android, Word, and Google Docs
- Display problems caused by the UTF-8 BOM
Some applications - such as a text editor or a browser - will display the BOM as an extra line in the file, others will display unexpected characters, such as 
- How to Type Umlaut Letters (ä, ö, ü, ë, ï, ) on Keyboard
Learn how to type umlaut letters (ä, ö, ü, ë, ï, ) on your keyboard to enhance your writing and pronunciation of these unique characters: umlaut letters
- Ï - Wikipedia
Ï (minuscule: ï) is a symbol used in various languages written with the Latin alphabet; the Latin letter I with a diacritic of two dots, which may be read as I with diaeresis
- Unicode Decode
code Speed Up Development Paste any text, a character, a word, or a full paragraph, and get an instant, character-by-character breakdown Unicode Decode shows you exactly what’s in your string so you can debug faster and ship with confidence
- What Does Ï Mean? (i With Two Dots) - Grammarhow
When to Use ï (Two Dots) Officially speaking, you do not have to use the i with two dots in English There is no reason to do so as it has been replaced by the simpler “i” that appears in the English alphabet You may include “ï” in French words like “naïve” where it originated
- How to Type Umlaut Letters (ä, ö, ü, ë, ï, ) on Any Keyboard
Umlaut letters are among the most consistently supported special characters across all modern platforms — every major operating system, browser, and font includes the full set of ä, ë, ï, ö, ü, and
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