簡介 PHP7 新特色，並重點提示 PHP7 向下相容以及無法相容的部分，同時回顧一下 PHP 各版本時程。

1. PHP 7
7
Bobo Chen

2. • PHP
• PHP 7
• 7
• 7
• 7 PHP 7

3. • PHP
• PHP 7
• 7
• 7
• 7 PHP 7

4. PHP 6 ?
PHP
Personal Home
Page Tools 1.0
PHP/FI 2 PHP 3
PHP 4 PHP 5 PHP 7
1995 1997 1998
2000 2004 2015

5. PHP
2013 2014 2015 2016 2017 2018
5.3
5.4
5.5
5.6
7.0
http://php.net/supported-versions.php
7/10
12/3
12/31
12/3 12/3
12/31
Active support Security fixes only

6. PHP
5.3 Namespace
Anonymous
Functions
?: Fix bugs
5.4 Traits Array [ ]
php -S
localhost:8000
5.5 Generators ClassName::class
try ... catch
... finally
list() yield
5.6
Constant
expressions
¶
Enhance use
operator
**
Variadic
functions via ...
¶
7.0

7. • PHP
• PHP 7
• 7
• 7
• 7 PHP 7

8. PHP 7
http://media1.santabanta.com/full2/Animals/Elephants/elephants-14a.jpg
!
!
...

9. PHP 7
•
•
• (?)
• 2015/12/3
http://media1.santabanta.com/full2/Animals/Elephants/elephants-14a.jpg

10. http://www.zend.com/en/resources/php7_infographic

11. http://www.zend.com/en/resources/php7_infographic

12. PHP 7
https://www.facebook.com/jace.ju/

13. • PHP
• PHP 7
• 7
• 7
• 7 PHP 7

14. 7
1. The Null Coalesce Operator (??)
2. The Spaceship Operator (<=>)
3. Type Declarations
4. Anonymous Classes
5. Whitelisting Unserialization
6. Session Initialization Options
7. Group use declarations(Namespace use)
and more…
http://php.net/manual/en/migration70.new-features.php

15. PHP7
• MAMP Pro ( Demo )
• phpbrew PHP by c9s
• Laravel Homestead

16. ?? Null Coalesce Operator
// PHP 5
if (isset($_GET['user'])) {
$user = $_GET['user'];
} else {
$user = 'Nobody';
}
// PHP 5.3
$user = isset($_GET['user']) ? $_GET['user'] : 'Nobody';
PHP5
$user = $_GET['user'] ?? 'Nobody';
PHP7

17. <=> Spaceship Operator
echo 1 <=> 2; // -1
echo 1 <=> 1; // 0
echo 2 <=> 1; // 1
https://www.javacodegeeks.com/wp-content/uploads/2014/01/space-ship.jpeg
PHP7

18. <=> Spaceship Operator
function comparison($a, $b)
{
if ($a == $b) {
return 0;
}
return ($a < $b) ? -1 : 1;
}
PHP5
function comparison($a, $b)
{
return $a <=> $b;
}
PHP7

19. Type Declarations
• Scalar type declarations int string float bool
<?php
function setAge(int $age)
{
}
setAge('this is string.');
setAge('30'); // integer
PHP7

20. Type Declarations
• Return type declarations
<?php
function getUser() : User
{
return [];
}
interface SomeInterface {
public function getUser() : User;
}
PHP7

21. Type Declarations
• Strict mode
<?php
declare(strict_types=1); // PHP
function setAge(int $age)
{
}
setAge('this is string.');
PHP7

22. use App{Person, Animal};
use App{Person as P, Animal as A};
Group use declarations
use AppPerson;
use AppAnimal; // use
PHP5
PHP7

23. • PHP
• PHP 7
• 7
• 7
• 7 PHP 7

24. 7
1. Octal Literals
2. String Parsing
3. Division by Zero
4. Uniform Variable Syntax
5. list() Behavior
6. Error Handling // Many fatal errors converted to Exceptions
7. PHP4 style Constructors are not allowed
http://php.net/manual/en/migration70.incompatible.php
and more…

25. Octal Literals
// 8 PHP truncated
echo 0128; // 012
echo 01281122; // 012
PHP5
echo 0128; // PHP7 Parse error: Invalid numeric literal
PHP7

26. String Parsing
var_dump(is_numeric("0x01A")); // true
var_dump('0x1A' + '0x01'); // 10 26+1
PHP5
var_dump(is_numeric("0x01A")); // false
var_dump('0x1A' + '0x01'); // 0+0=0
PHP7

27. Division by Zero
var_dump(5/0); // bool(false)
var_dump(0/0); // bool(false)
var_dump(5%0); // bool(false)
PHP5
var_dump(5/0); // float(INF)
var_dump(0/0); // float(NAN) // JavaScript JS NaN
var_dump(5%0); // DivisionByZeroError
PHP7

28. • PHP
• PHP 7
• 7
• 7
• 7 PHP 7 ... T_T

29. 7 PHP7
1. Never Use PHP Close Tags At the End of A File
2. Never Pass By Reference If Not Required
3. mysql_functions Should Not Be Used ( mysqli_*)
4. ereg PCRE extension: preg_* ( PCRE
extension: preg_*)
5. PHP4 Constructors Are Now Deprecated
6. Removed Extensions
7. Removed old and unsupported SAPIs

30. One More Thing…

31. PHP 7.1 is upcoming

32. PHP 7
7
The End.