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Php 5.5

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New features in php 5.5

New features in php 5.5

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Transcript

  • 1. PHP 5.5 Whats New!! Presented By : Naseer Ahmad
  • 2. Performance and Memory Performance by 10-30% Memory by 50% ● ● precompiled script bytecode in shared memory reduction in loading and parsing of scripts on every request HOW??? !! Zend Optimizer & opcode cache !! Available in PECL for PHP versions 5.2, 5.3 and 5.4
  • 3. New Features ● Finally keyword. ● foreach supporting lists now. <?php $array = [ [1, 2], [3, 4], ]; foreach ($array as list($a, $b)) { echo "A: $a; B: $bn"; } ?>
  • 4. New Features ● empty() supports arbitrary expression. ● Class name resolution via ::class <?php namespace NameSpace; class ClassName {} echo ClassName::class; //NameSpaceClassName ?>
  • 5. New Features(Array & String Direct Referencing) <?php echo 'Array dereferencing: '; echo [1, 2, 3][0]; Print : Array dereferencing : 1 echo "n"; echo 'String dereferencing: '; echo 'PHP'[0]; echo "n"; ?> Print : String dereferencing: P
  • 6. New Features(Generators) ● ● ● ● Routine to control the iteration of a loop Sequence of values in loop Values on demand In simple words, put foreach over a function :)
  • 7. New Features(Generators) Fine for normal usage What if we want to abstract it?
  • 8. Generators
  • 9. New Features(Generators) Simpler, lesser code
  • 10. New Features(Password Hashing Api) > Php 5.5 Relying on ● custom hash methods ● somewhat confusing crypt() method Php 5.5 Hashing api, wrapper around crypt() No external libraries,no additional installation PASSWORD_BCRYPT hashing algorithm, 60 characters hash. Salt and Cost options.
  • 11. <?php $timeTarget = 0.2; $cost = 9; do { $cost++; $start = microtime(true); password_hash("test", PASSWORD_BCRYPT, ["cost" => $cost]); $end = microtime(true); } while (($end - $start) < $timeTarget); echo "Appropriate Cost Found: " . $cost; //Appropriate Cost Found: 11 ?>
  • 12. New Features(Password Hashing Api) ● password_get_info — Returns information about the given hash ● password_hash — Creates a password hash ● password_needs_rehash — Checks if the given hash matches the given options ● password_verify — Verifies that a password matches a hash
  • 13. New Features(Password Hashing Api) <?php $hash = password_hash(‘MyPassword’, PASSWORD_DEFAULT); if(password_verify(‘MyPassword’, $hash)){ echo “Password is valid!!”; } else{ echo “invalid password.”} ?>
  • 14. References http://be1.php.net/migration55.new-features http://www.sitepoint.com/generators-in-php/ http://geekmonkey.org/articles/39-php-5-5-generators http://blog.ircmaxell.com/2012/07/what-generators-can-do-for-you.html http://blog.asmallorange.com/2013/08/php-roadmap-performance/ http://php.net/manual/en/function.password-hash.php http://uk1.php.net/manual/en/book.opcache.php https://support.cloud.engineyard.com/entries/26902267-PHP-Performance-IEverything-You-Need-to-Know-About-OpCode-Caches