UPGRADING

PHP 8.5 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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- BZ2:
  . bzcompress() now throws a ValueError when $block_size is not between
    1 and 9.
  . bzcompress() now throws a ValueError when $work_factor is not between
    0 and 250.

- LDAP:
  . ldap_get_option() and ldap_set_option() now throw a ValueError when
    passing an invalid option.

- SPL:
  . ArrayObject no longer accepts enums, as modifying the $name or $value
    properties can break engine assumptions.

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2. New Features
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- DOM:
  . Added Dom\Element::$outerHTML.

- XSL:
  . The $namespace argument of XSLTProcessor::getParameter(),
    XSLTProcessor::setParameter() and XSLTProcessor::removeParameter()
    now actually works instead of being treated as empty.
    This only works if the $name argument does not use Clark notation
    and is not a QName because in those cases the namespace is taken
    from the namespace href or prefix respectively.

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3. Changes in SAPI modules
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4. Deprecated Functionality
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- Hash:
  The MHASH_* constants have been deprecated.  These have been overlooked
  when the mhash*() function family has been deprecated per
  https://wiki.php.net/rfc/deprecations_php_8_1#mhash_function_family

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5. Changed Functions
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- Zlib:
  . The "use_include_path" argument for the 
    gzfile, gzopen and readgzfile functions had been changed
    from int to boolean.

- PDO_PGSQL:
  . PDO::pgsqlCopyFromArray also supports inputs as Iterable.
  . Pdo\Pgsql::setAttribute and Pdo\Pgsql::prepare supports
    PDO::ATTR_PREFETCH sets to 0 which set to lazy fetch mode.
    In this mode, statements cannot be run parallely.

- PGSQL:
  . pg_copy_from also supports inputs as Iterable.

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6. New Functions
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- Curl:
  . curl_multi_get_handles() allows retrieving all CurlHandles current
    attached to a CurlMultiHandle. This includes both handles added using
    curl_multi_add_handle() and handles accepted by CURLMOPT_PUSHFUNCTION.

- PGSQL:
  . pg_close_stmt offers an alternative way to close a prepared
    statement from the DEALLOCATE sql command in that we can reuse
    its name afterwards.

- Reflection:
  . ReflectionConstant::getFileName() was introduced.

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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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- Readline:
  . The return types of readline_add_history(), readline_clear_history(), and
    readline_callback_handler_install() have been changed to true, rather
    than bool.

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10. New Global Constants
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- POSIX:
  . POSIX_SC_OPEN_MAX.

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11. Changes to INI File Handling
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12. Windows Support
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* The configuration variables PHP_VERSION, PHP_MINOR_VERSION, and
  PHP_RELEASE_VERSION are now always numbers.  Previously, they have been
  strings for buildconf builds.

* FFI:
  . It is no longer necessary to specify the library when using FFI::cdef()
    and FFI::load(). However, this convenience feature should not be used in
    production.

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13. Other Changes
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14. Performance Improvements
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- XMLWriter:
  . Improved performance and reduce memory consumption.