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Friday, 19 June 2015

New features of PHP 5.4 with Examples



Following are 5.4 new features.

  1. Traits has been added. For Example:
     //Create traits
    trait HttpRequest 
    { 
          public function getHttpResponse($url, $port) 
          { 
    
                return $response; 
          } 
    } 
    
    
    //Use the traits
    
    class ABC_API 
    { 
          use HttpRequest; // use our trait 
    
          public function getResponse($url) 
          { 
                return $this->getHttpResponse($url, 80); 
          } 
    } 
  2. Short array syntax has been added. For Example:
    $array = [1,2,3,'Web technology','Experts Notes'];
  3. Function array dereferencing has been added. For Example:
    function fruits(){
    return array(0=>'Apple', 1=>'Banana', 2=>'Mango',3=>'Orange');
    }   
    echo fruits()[2]; //Mango 
  4. Closures now support $this.
  5. Class member can access on instantiation has been added. For Example:
    class test{
      function fruits(){
      return array(0=>'Apple', 1=>'Banana', 2=>'Mango',3=>'Orange');
      }
    }
    print_r((new test())->fruits());
    
    Output:
    Array
    (
        [0] => Apple
        [1] => Banana
        [2] => Mango
        [3] => Orange
    )
  6. Class::{expr}() syntax is now supported. For Example:
    class test{
    static  function newMethod(){
    echo "called function";
    }
    }  
    
    $method = 'newMethod';
    // this works 
    test::$method(); 
    
    // and this works 
    test::{'newMethod'}();
    
  7. Binary number format has been added, e.g. 0b001001101.
  8. Improved parse error messages and improved incompatible arguments warnings.
  9. The session extension can now track the upload progress of files.
  10. Built-in development web server in CLI mode.




Following functions are deprecated in PHP 5.4.

  1. mcrypt_generic_end()
  2. mysql_list_dbs()



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