PHP7 New Content Summary (update at any time)

I. parameter and return value type declaration

It can be stated that: float,int,bool,string,interfaces,array,callable

General mode:

   function sum(int ...$ints) { return array_sum($ints); } print(sum(2, ‘3‘, 4.1)); //9

  Strict mode:  Declare (strict_types=   1); function sum  (int  ... $ints) {return array_sum ($ints); } print (SUM (2,  ' 3 ', 4.1)); //fatal error:uncaught typeerror:argument 2 passed to sum () must is of the type Integer, String giv En, ...              

   
 return value: 
 Declare (strict_types =   Span class= "Hljs-number" >1); function returnIntValue (int $value): int {return $value + 1.0; } print (Returnintvalue (5));  
  two.                 Empty merge operator  

  isset ($_get[ ' AA '])? $_get[< Span class= "hljs-string" > ' AA ']:  ' not passed ' equivalent to       $_get[ ' AA ']??:       Not passed '; 
 
  three.        spaceship operator  

   print (1 <=> 1)//0 print ( Span class= "Hljs-number" >1 <=> 2);//-1 print (2 <=> 1 );//1 
 
  four. To define a solid array  
          

  define (' animals 
  Five.          Filter Unserialize  
 PHP 7 introduces a filtered unserialize () function to provide better security when deserializing objects on untrusted data. It prevents possible code injection and allows developers to whitelist classes that can be deserialized. 
 
  Six. Use batch declaration 
  under the same namespace, now you can batch declare  
 use some/namespace/{classa,  Classb, classc as c};  
 
  seven. Support for negative string offsets  

var_dump("abcdef"[-2]);var_dump(strpos("aabbcc", "b", -3));

八.foreach no longer changes the internal array pointer

$array = [0, 1, 2];foreach ($array as &$val) { var_dump(current($array));}

PHP5 output:
Int (1)
Int (2)
BOOL (FALSE)
PHP7 Output :
Int (0)
Int (0)
Int (0)

PHP7 New Content Summary (update at any time)