PHP7 傳說中的第七隻大象

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。

Transcript

1. PHP 7 㯽藯Ӿጱᒫ7櫇य़虡 Bobo Chen
2. य़姛 • ࢧ觎稲դ PHP 粚๜ • 㯽藯ӾጱPHP 7 • 7 殻碝粬ᜋ • 7 讨膏膑粚癩吖蒂 • 7 կࣁ PHP 7 ᥝ螨عጱԪ
3. • ࢧ觎稲դ PHP 粚๜ • 㯽藯ӾጱPHP 7 • 7 殻碝粬ᜋ • 7 讨膏膑粚癩吖蒂 • 7 կࣁ PHP 7 ᥝ螨عጱԪ
4. PHP 6 ? ࢧ觎稲դ PHP 粚๜ Personal Home Page Tools 1.0 PHP/FI 2 PHP 3 PHP 4 PHP 5 PHP 7 1995 1997 1998 2000 2004 2015
5. 匍դ PHP 粚๜ 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. 匍դ PHP ᯿ᥝ粬ᜋ 5.3 Namespace Anonymous Functions ?: Fix bugs 5.4 Traits Array [ ] php -S localhost:8000 5.5 Generators ClassName::class try ... catch ... finally list()牏yield 5.6 Constant expressions ¶ Enhance use operator ** Variadic functions via ... ¶ 7.0
7. • ࢧ觎稲դ PHP 粚๜ • 㯽藯ӾጱPHP 7 • 7 殻碝粬ᜋ • 7 讨膏膑粚癩吖蒂 • 7 կࣁ PHP 7 ᥝ螨عጱԪ
8. 㯽藯ӾጱPHP 7 http://media1.santabanta.com/full2/Animals/Elephants/elephants-14a.jpg ᪒ጱ盠! ݰ஑੝! 㯽藯Ӿ磪Ӟ圵य़虡...
9. 㯽藯ӾጱPHP 7 • 懿䛂誢አᰁๅ੝ • 硳胼൉܋Ӟ狝 • 禅֯ጱݻӥፘ਻௔(?) • ෝ 2015/12/3 ྋୗ咳蔭 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. 蝫ᴨ畳᮷ࣁ䋊ጱ PHP 7 https://www.facebook.com/jace.ju/
13. • ࢧ觎稲դ PHP 粚๜ • 㯽藯ӾጱPHP 7 • 7 殻碝粬ᜋ • 7 讨膏膑粚癩吖蒂 • 7 կࣁ PHP 7 ᥝ螨عጱԪ
14. 7殻碝粬ᜋ 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. ই֜ୌ缏 PHP7 䁆ᤈ絑ह牫 • ֵአ MAMP Pro 獥矦 (๜稞 Demo ֵአ) • ֵአ phpbrew 㬵獥矦 PHP 犋ݶ粚๜ 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物int牏string牏float牏bool 
 <?php
 
 function setAge(int $age)
 {
 
 }
 
 setAge('this is string.');
 
 setAge('30'); // 䨝ᛔ㵕旉ࣳ傶 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); // 樄珸盅牧PHP 犋䨝ᛔ㵕旉ࣳ
 
 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 App\Person;
 use App\Animal; // 襑ᥝ㮆獨 use 蝱㬵 PHP5 PHP7
23. • ࢧ觎稲դ PHP 粚๜ • 㯽藯ӾጱPHP 7 • 7 殻碝粬ᜋ • 7 讨膏膑粚癩吖蒂 • 7 կࣁ PHP 7 ᥝ螨عጱԪ
24. 7 讨膏膑粚癩吖蒂 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 // ࣁ8蝱ګӥ牧ইຎ磪覍ဩጱਁᒧ牧PHP 䨝盄অஞጱ䒻֦ℂᮎ㮆ਁᒧԏ盅᮷ truncated ധ echo 0128; //䨝䒻֦狕ྋ౮ 012 echo 01281122; //䨝䒻֦狕ྋ౮ 012 PHP5 echo 0128; // ᘒPHP7 㳷ฎ䨝㽆ڊӞ㮆 Parse error: Invalid numeric literal PHP7
26. String Parsing 
 var_dump(is_numeric("0x01A")); // true
 
 var_dump('0x1A' + '0x01'); // ፘ吚ෝ10蝱ګጱ 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); // 疥䨝ࢧ㯽 bool(false) 
 var_dump(0/0); // 疥䨝ࢧ㯽 bool(false) 
 var_dump(5%0); // 疥䨝ࢧ㯽 bool(false) PHP5 var_dump(5/0); // 疥䨝ࢧ㯽 float(INF)
 var_dump(0/0); // 疥䨝ࢧ㯽 float(NAN) // ޾ JavaScript ᤈ傶觊犲牧JS ࢧ㯽ጱฎ NaN
 var_dump(5%0); // 瞦ڊ DivisionByZeroError ֺक़ PHP7
28. • ࢧ觎稲դ PHP 粚๜ • 㯽藯ӾጱPHP 7 • 7 殻碝粬ᜋ • 7 讨膏膑粚癩吖蒂 • 7 կࣁ PHP 7 ᥝ螨عጱԪ ...蝡犚᮷૪妿ᤩ祌አԧ T_T
29. 7կࣁPHP7ᥝ螨عጱԪ 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 (ᘒฎ䛑扗አ mysqli_*) 4. ereg PCRE extension: preg_* ૪妿祌አ(ᘒฎ䛑扗ᥝ硬አ 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 㯽藯Ӿጱᒫ7櫇य़虡 The End.