المعرفة:: Regex الحالة::مؤرشفة المراجع:: https://gist.githubusercontent.com/Humoud/f40f58cd85c5935a444c/raw/c77dffa4c2ab75411f0c70c6bfcd6e1bcdbaf3e1/regex-arabic.md
Detect all Arabic Characters
/[\u0600-\u06ff]|[\u0750-\u077f]|[\ufb50-\ufbc1]|[\ufbd3-\ufd3f]|[\ufd50-\ufd8f]|[\ufd92-\ufdc7]|[\ufe70-\ufefc]|[\uFDF0-\uFDFD]/
Better: [\u0600-\u06ff\u0750-\u077f\ufb50-\ufbc1\ufbd3-\ufd3f\ufd50-\ufd8f\ufd92-\ufdc7\ufe70-\ufefc\uFDF0-\uFDFD]
Summary
For more info check this Wiki link to see Arabic letters in Unicode:
https://en.wikipedia.org/wiki/Arabic_(Unicode_block)
References
http://stackoverflow.com/questions/11323596/regular-expression-for-arabic-language