PHP 5.5.0 ChangeLog
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PHP 5.5.0 was released on June 20, 2013, introducing several new features including generators, coroutine support, the 'finally' keyword, and a simplified password hashing API. Additional enhancements include support for constant array/string dereferencing and scalar class name resolution, while the deprecated MySQL extension is now replaced by the mysqli extension. The update aims to improve memory usage, facilitate cooperative multitasking, and streamline password management.
![Features included
Constant array/string dereferencing
Array and string literals can now be dereferenced directly to
access individual elements and characters
echo [abc, xyz, pqr][0];
// results abc.
echo „DHIRAJ‟[0];
// results D.](https://image.slidesharecdn.com/php5-5-0-130621070909-phpapp01/85/PHP-5-5-0-ChangeLog-6-320.jpg)
![Features included
Non-scalar Iterator key support is added
The ability to iterate over an array of arrays and unpack the nested array
into loop variables by providing a ”list()” as the value.
$array = [[1, 2],[3, 4]];
foreach ($array as list($a, $b)) {
echo "A: $a; B: $bn";
}
result: A: 1; B:2
A: 3; B:4](https://image.slidesharecdn.com/php5-5-0-130621070909-phpapp01/85/PHP-5-5-0-ChangeLog-9-320.jpg)
PHP 5.5.0 ChangeLog
- 2. Introduction On 20-June-2013, PHP 5.5.0 rolled out by the core development team. It consists to some bug fixes as well as some new features.
- 3. Features included Introduced “Generators” and “Coroutines” Generators : It provides easy way to implement simple iterators such as “foreach”. This implementation will save memory. Coroutines will help in cooperative multitasking. You can write a code to iterate a set of data without creating an array in memory, mainly with the help of “yield” keyword. function getValues() { yield “iOS"; yield “Android"; yield “BlackBarry"; } $stuff = getValues(); foreach($stuff as $thing) { echo $thing . "n"; }
- 4. Features included “finally” keyword is added Now, a finally block can be written after the try, catch block. This block will be executed regardless of whether an exception has been thrown, and before normal execution resumes. try { echo ”Try Block” . "n"; } catch (Exception $e) { echo 'Caught exception: ', $e- >getMessage(), "n"; } finally { echo “Finally.n"; }
- 5. Features included A simplified Password hashing API is introduced It provides an easy to use wrapper around “crypt()” for creating and managing passwords. No external library is required. No installation is required. No configuration directives in php.ini password_hash and password_verify are the functions to be used.
- 6. Features included Constant array/string dereferencing Array and string literals can now be dereferenced directly to access individual elements and characters echo [abc, xyz, pqr][0]; // results abc. echo „DHIRAJ‟[0]; // results D.
- 7. Features included Scalar class name resolution added With the help of “::class” keyword, you can get a string containing the fully qualified name of the Class. Particularly useful with namespaced classes. namespace NS { class ClassName { } echo ClassName::class; //results NSClassName. }
- 8. Features included Now empty() can be used on any expression empty() function can be called on not only variables but function returns or any other arbitrary expressions.
- 9. Features included Non-scalar Iterator key support is added The ability to iterate over an array of arrays and unpack the nested array into loop variables by providing a ”list()” as the value. $array = [[1, 2],[3, 4]]; foreach ($array as list($a, $b)) { echo "A: $a; B: $bn"; } result: A: 1; B:2 A: 3; B:4
- 10. Changes MySQL extension: This extension has been deprecated, so there will be deprecated warnings on use of this extension. MySQLi extension can be used in place of that. Support for MySQL 5.6+ has been incorporated in various ways.
- 11. Many of the bugs have been fixed in this version. The complete change log can be seen on http://php.net/ChangeLog-5.php