1. Introducing PHP Latest Updates Presenter Iftekhar Ahmed
Eather Software Engineer Divine IT Limited Source php.net,
slideshare.com, wiki, google, git document and others1
2. Topics PHP 5.3 PHP 5.4 PHP 5.5 PSR FlexiGrid2 3. PHP 5.3
Released Date 30-Jun-20093 4. Whats New in PHP 5.3 Late Static
BindingClosuresNOWDOCTernary short cutJump LabelOperators, Syntax,
Magic Methods, Constants & php.iniGarbage collectorDate and
Time4NamespacesOthers 5. Namespaces Namespaces are declared using
the namespace keyword. A file containing a namespace must declare
the namespace at the top of the file before any other code.
Example: 5 6. __ NAMESPACE__ 6 7. Class Resolution namespace
MyFrameworksomeModule; class PdoException {} new PdoException(); //
MyFrameworkmyModule new PdoException(); // ext/pdo new DateTime();
// class not found! new DateTime(); // works7 8. Aliasing
foo/bar.php: some/code.php: 8 9. Late Static Binding Late static
bindings can be used to reference the called class in a context of
static inheritance. Example: 10. self vs static with LSB class Base
{ public static function m() { self::printName();class Extended
extends Base {static::printName();static function
printName()}{static function printName()echo __CLASS__;{}echo
__CLASS__; }Extended::m(); // Output: Base Extended} Base::m();10//
Output: Base Base 11. Closures Anonymous functions, also known as
closures, allow the creation of functions which have no specified
name. They are most useful as the value of callback parameters, but
they have many other uses. Example: 11 12. NOWDOC & HEREDOC
Nowdocs are to single-quoted strings what heredocs are to
double-quoted strings. A nowdoc is specified similarly to a
heredoc, but no parsing is done inside a nowdoc. Example: NOWDOC
echo 'orange', 'bar' => 'apple'];var_dump( array('foo', 'foo'
=> 'bar') == ['foo', 'foo' => 'bar'] ); //output: true29 30.
Function Array De-referencing Another oft-requested syntax
addition. Function calls that return an array can now be
de-referenced directly: Example: function fruits() { return
['apple', 'banana', 'orange']; } echo fruits()[0]; // Outputs:
apple30 31. Instance Method Call Related to function array
dereferencing, you can now call a method on object instantiation.
And as in previous versions, you can of course still chain method
calls, so you can now write code like this: Example: class foo {
public $x = 1; public function getX() { return $this->x; }
public function setX($val) { $this->x = $val; return $this; }
}$X = (new foo)->setX(20)->getX(); echo $X; // 2031 32.
Instance Method Call Although, unless your constructor is doing
something useful, since the instantiated object is thrown away
perhaps you should be using a static method call here instead. If
we combine it with the short array syntax and function array
de-referencing we can write some really convoluted code: class foo
extends ArrayObject { public function __construct($arr) {
parent::__construct($arr); } } echo (new foo( [1, [4, 5], 3]
))[1][0];What is output?32 33. Closure Binding Although closure is
introduced in 5.3 but binding option include in 5.4 where they
interact with objects. Example: class Foo { private $prop; function
__construct($prop) { $this->prop = $prop; } public function
getPrinter() { return function() { echo ucfirst($this>prop); };
} }33$a = new Foo('bar'); $b = new Foo('pickle'); $func =
$a->getPrinter(); $func(); // Outputs: Bar $func =
$func->bindTo($b); $func(); // Outputs: Pickle 34. Objects as
Functions There is a new magic method called __invoke which can be
used like this: Example: class MoneyObject { private $value;
function __construct($val) { $this->value = $val; } function
__invoke() { return sprintf('$%.2f',$this->value); } } $Money =
new MoneyObject(11.02/5*13); echo $Money(); // Outputs: $28.6534
35. Built-in Web Server (CLI) The CLI server is a tiny Web server
implementation that you can run from the command line. This web
server was designed to aid application development. It may also be
useful for testing purposes or for application demonstrations that
are run in controlled environments. It is not intended to be a
full-featured web server. It should not be used on a public
network. % php -S localhost:8080 /path/to/router.php PHP 5.4.0
Development Server started at Sun Mar 11 13:28:01 2012 Listening on
localhost:8080 Document root is /tmp/web Press Ctrl-C to quit.35
36. JsonSerializable Interface You can now control what happens if
someone tries to json_encode() your object by implementing the
JsonSerializable interface: Example: class Foo implements
JsonSerializable { private $data = 'Bar'; public function
jsonSerialize() { return array('data'=>$this->data); } } echo
json_encode(new Foo); // Outputs: {"data":"Bar"}36 37. Binary
Notation To go along with PHPs native support for hexadecimal and
octal there is now also binary notation: $mask = 0b010101;37 38.
Improved Error Messages Error messages are slightly
improved.Before: % php -r 'class abc foo' Parse error: syntax
error, unexpected T_STRING, expecting '{' in Command line code on
line 1After: % php -r 'class abc foo' Parse error: syntax error,
unexpected 'foo' (T_STRING), expecting '{' in Command line code on
line38 39. Array to String Conversion Notice If you have ever used
PHP you have probably ended up with the word Array randomly
appearing in your page because you tried to output an array
directly. Whenever an array is directly converted to a string,
chances are it is a bug and there is now a notice for that:
Example: $a = [1,2,3]; echo $a; //Output notice: Note: Array to
string conversion in example.php onlLine 239 40. Short open tag
