Php 5.5
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PHP 5.5 provides major performance improvements through the use of an opcode cache and precompiled bytecode. It introduces several new features including the finally keyword, generators, array and string dereferencing, and a new password hashing API. The password hashing API provides a simple interface for securely storing passwords hashed with bcrypt. Overall, PHP 5.5 focuses on performance, memory usage, and new language features.
![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";
}
?>](https://image.slidesharecdn.com/php5-140211021435-phpapp01/85/Php-5-5-4-320.jpg)
![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](https://image.slidesharecdn.com/php5-140211021435-phpapp01/85/Php-5-5-6-320.jpg)
![<?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
?>](https://image.slidesharecdn.com/php5-140211021435-phpapp01/85/Php-5-5-12-320.jpg)
Php 5.5
- 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
- 4. 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"; } ?>
- 5. New Features ● empty() supports arbitrary expression. ● Class name resolution via ::class <?php namespace NameSpace; class ClassName {} echo ClassName::class; //NameSpaceClassName ?>
- 6. 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
- 7. 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 :)
- 8. New Features(Generators) Fine for normal usage What if we want to abstract it?
- 9. Generators
- 11. 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.
- 12. <?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 ?>
- 13. 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
- 14. 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.”} ?>