Major changes in php7

  1.  Improvement In Exception Handling.
  2.  Few New Operators Added.
  3. Type Declaration is possible.
  4. Constant Arrays using define().
  5. Anonymous classes.
  6. Unicode codepoint escape syntax.
  7. Closure::call().
  8. Filtered unserialize().
  9. IntlChar.
  10. Group use declarations.
  11. Generator Return Expressions.
  12. Generator delegation.
  13. Integer division with intdiv().
  14. Session options.
  15. preg_replace_callback_array().
  16. CSPRNG Functions.
  17. Improvement In Speed.

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