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![Non-numeric string offsets - e.g.
$a['foo'] where $a is a string - now
return false on isset() and true on
empty(), and produce a warning if
you try to use them.](https://image.slidesharecdn.com/php54-120313110137-phpapp02/75/PHP-5-4-So-what-10-2048.jpg)
![Short array syntax
• $a = [1, 2, 3, 4];
• $a = ['one' => 1, 'two' => 2, 'three' => 3, 4];](https://image.slidesharecdn.com/php54-120313110137-phpapp02/75/PHP-5-4-So-what-16-2048.jpg)
![Function array dereferencing
• foo()[0]](https://image.slidesharecdn.com/php54-120313110137-phpapp02/75/PHP-5-4-So-what-17-2048.jpg)
![Stack Frame Limit
• array debug_backtrace ([ int $options =
DEBUG_BACKTRACE_PROVIDE_OBJECT [, int
$limit = 0 ]] )
• void debug_print_backtrace ([ int $options = 0
[, int $limit = 0 ]] )](https://image.slidesharecdn.com/php54-120313110137-phpapp02/75/PHP-5-4-So-what-24-2048.jpg)
![Non-numeric string offsets - e.g.
$a['foo'] where $a is a string - now
return false on isset() and true on
empty(), and produce a warning if
you try to use them.](https://crownmelresort.com/image.slidesharecdn.com/php54-120313110137-phpapp02/75/PHP-5-4-So-what-10-2048.jpg)
![Short array syntax
• $a = [1, 2, 3, 4];
• $a = ['one' => 1, 'two' => 2, 'three' => 3, 4];](https://crownmelresort.com/image.slidesharecdn.com/php54-120313110137-phpapp02/75/PHP-5-4-So-what-16-2048.jpg)
![Function array dereferencing
• foo()[0]](https://crownmelresort.com/image.slidesharecdn.com/php54-120313110137-phpapp02/75/PHP-5-4-So-what-17-2048.jpg)
![Stack Frame Limit
• array debug_backtrace ([ int $options =
DEBUG_BACKTRACE_PROVIDE_OBJECT [, int
$limit = 0 ]] )
• void debug_print_backtrace ([ int $options = 0
[, int $limit = 0 ]] )](https://crownmelresort.com/image.slidesharecdn.com/php54-120313110137-phpapp02/75/PHP-5-4-So-what-24-2048.jpg)
More Related Content
PHP 5.4 - So what?!
- 1.
- 2. Always prefer theenglish manual!
- 3.
- 4. Safe mode isno longer supported
- 5. Magic quotes hasbeen removed.
- 6. The register_globals and register_long_arraysini directives have been removed.
- 7. Call-time pass byreference has been removed.
- 8. The break andcontinue statements no longer accept variable arguments.
- 9. In the dateand time extension, the timezone can no longer be set using the TZ environment variable.
- 10. Non-numeric string offsets- e.g. $a['foo'] where $a is a string - now return false on isset() and true on empty(), and produce a warning if you try to use them.
- 11. Converting an arrayto a string will now generate an E_NOTICE level error
- 12. The default characterset is now UTF-8, instead of ISO-8859-1
- 13. New Reserved Keywords •trait • callable • insteadof
- 14.
- 15.
- 16. Short array syntax •$a = [1, 2, 3, 4]; • $a = ['one' => 1, 'two' => 2, 'three' => 3, 4];
- 17. Function array dereferencing •foo()[0]
- 18. Closures now support$this
- 19. <?= is nowalways available, regardless of the short_open_tag ini option.
- 20. Class member accesson instantiation has been added • (new Foo)->bar()
- 21. Session Upload Progress •Session extension can now track the upload progress of files. • ini settings – session.upload_progress.enabled = true – session.upload_progress.cleanup = true – session.upload_progress.prefix = "upload_progress_ " – session.upload_progress.name = "PHP_SESSION_UPLOAD_PROGRESS " – session.upload_progress.freq = "1%" – session.upload_progress.min-freq = 1
- 22. Built-in web serverin CLI mode • php -S localhost:8000 -t foo/ • C:UsersfuhrDownloadsphp-5.4.0-Win32- VC9-x86>.php -c php.ini-development -S localhost:8181 -t Usersfuhrworkspacephp54src
- 23.
- 24. Stack Frame Limit •array debug_backtrace ([ int $options = DEBUG_BACKTRACE_PROVIDE_OBJECT [, int $limit = 0 ]] ) • void debug_print_backtrace ([ int $options = 0 [, int $limit = 0 ]] )
- 25. New Classes andInterfaces
- 26.
- 27.
- 28.
- 29.
- 30. SPL • RegexIterator::getRegex() • SplObjectStorage::getHash() • DirectoryIterator::getExtension() • SplDoublyLinkedList::serialize() • SplDoublyLinkedList::unserialize() • SplFileInfo::getExtension() • SplFileObject::fputcsv() • SplQueue::serialize() • SplQueue::unserialize() • SplStack::serialize() • SplStack::unserialize() • SplTempFileObject::fputcsv()
- 31. Further Reading • http://www.php.net/manual/en/migration54. php • http://css.dzone.com/articles/writing-clean- code-php-54 • http://net.tutsplus.com/tutorials/php/php-5- 4-is-here-what-you-must-know/