PHP 8.0 UPGRADE NOTES

1. Backward Incompatible Changes
2. New Features
3. Changes in SAPI modules
4. Deprecated Functionality
5. Changed Functions
6. New Functions
7. New Classes and Interfaces
8. Removed Extensions and SAPIs
9. Other Changes to Extensions
10. New Global Constants
11. Changes to INI File Handling
12. Windows Support
13. Other Changes
14. Performance Improvements


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1. Backward Incompatible Changes
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- Core:
  . Removed track_errors ini directive. This means that $php_errormsg is no
    longer available. The error_get_last() function may be used instead.
  . Removed create_function(). Anonymous functions may be used instead.

- GD:
  . The deprecated function image2wbmp() has been removed.
    RFC: https://wiki.php.net/rfc/image2wbmp
  . The deprecated functions png2wbmp() and jpeg2wbmp() have been removed.
    RFC: https://wiki.php.net/rfc/deprecate-png-jpeg-2wbmp

- GMP:
  . gmp_random() has been removed. One of gmp_random_range() or
    gmp_random_bits() should be used instead.

- Intl:
  . The deprecated constant INTL_IDNA_VARIANT_2003 has been removed.
    RFC: https://wiki.php.net/rfc/deprecate-and-remove-intl_idna_variant_2003

- Mbstring:
  . The mbstring.func_overload directive has been removed. The related
    MB_OVERLOAD_MAIL, MB_OVERLOAD_STRING, and MB_OVERLOAD_REGEX constants have
    also been removed. Finally, the "func_overload" and "func_overload_list"
    entries in mb_get_info() have been removed.
  . mb_parse_str() can no longer be used without specifying a result array.

- Standard:
  . parse_str() can no longer be used without specifying a result array.

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2. New Features
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3. Changes in SAPI modules
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4. Deprecated Functionality
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5. Changed Functions
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6. New Functions
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7. New Classes and Interfaces
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8. Removed Extensions and SAPIs
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9. Other Changes to Extensions
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10. New Global Constants
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11. Changes to INI File Handling
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12. Windows Support
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13. Other Changes
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14. Performance Improvements
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