PHP构造函数的继承分析

<?php
class BaseClass {
   function __construct() {
       print "In BaseClass constructorn";
   }
}

class SubClass extends BaseClass {
   function __construct() {
       parent::__construct();
       print "In SubClass constructorn";
   }
}

class OtherSubClass extends BaseClass {
    // inherits BaseClass's constructor
}

// In BaseClass constructor
$obj = new BaseClass();

// In BaseClass constructor
// In SubClass constructor
$obj = new SubClass();

// In BaseClass constructor
$obj = new OtherSubClass();
?>

<?php
namespace Foo;
class Bar {
    public function Bar() {
        // treated as constructor in PHP 5.3.0-5.3.2
        // treated as regular method as of PHP 5.3.3
    }
}
?>

<?php

class Fruit {

public function __construct($name)

{

echo '水果'.$name.'创建了';

}

}

class Apple extends Fruit {

public function __construct($name)

{

parent::__construct($name);

}

}

$apple = new Apple("苹果");

// 输出 水果苹果创建了

?>

function  __construct($name){

$this->setName($name);

}
然后实例化CEO类，获得其name成员：

$ceo= new CEO("Gonn");

echo $ceo->getName();
将得到如下结果：

My name is Gonn

function  __construct(){

echo "CEO object created!";

}

function __construct($name){

Employee::__constrcut($name);

Executive::__construct();

echo "CEO object created!";
}

class base1
{
  function base1()
  {
echo 'this is base1 construct';
  }
}

class class1 extends base1
{
  function class1()
  {
$this->base1();
echo 'this is class1 construct';
  }
}
$c1 = new class1;

class base2
{
  function __construct()
  {
echo 'this is base2 construct';
  }
  function __destruct()
  {
  }
}

class class2 extends base2
{
  function __construct()
  {
parent::__construct();
echo 'this is class2 construct';
  }
}

class class3
{
  function __construct() //for PHP5.0
  {
echo 'this is class2 construct';
  }

  function class3() //for PHP4.0
  {
$this->__construct();
  }
}

$c3 = new class3;

function func1($a) { $a = $a + 1;}
function func2(&$a) { $a = $a + 1;}
 $sample = 1;
func1($sample);
 echo $sample; // 输出 1
 $sample = 1;
func2($sample);
 echo $sample; // 输出 2

<?php
$num1 = 15;
$num2 = &$num1;
$num2 = 20;
echo $num1;//输出20
?>

<?php
function func1($a) {
  $a = $a + 1;
}
function func2(&$a) {
  $a = $a + 1;
}
$sample = 1;
func1($sample);
echo $sample; // 输出 1
 
$sample = 1;
func2($sample);
echo $sample; // 输出 2
<?>

server_name   www.111cn.net;
fastcgi_param  SERVER_NAME        $server_name;

if (! empty ( $_FILES ['file'] ['name'] )) {
 $img = $this->up_file ( "file" );
}

function up_file($inputname, $destinate = "../data/agency/", $type = "", $maxSize = 0) {
 $arr = explode ( '.', $_FILES [$inputname] ['name'] );
 $count = count ( $arr );
 $typearr = explode ( ',', $type );
 
 if (! empty ( $type )) {
  if (! in_array ( $arr [$count - 1], $typearr )) {
   $this->show_warning ( '文件类型不允许上传' );
   exit ();
  }
 }
 if ($maxSize != 0) {
  if (($_FILES [$inputname] ['size'] / 1000) >= $maxSize) {
   $this->show_warning ( '文件大小超过限制' );
   exit ();
  }
 }
 
 if (! empty ( $destinate )) {
  $destinate = substr ( str_replace ( "", "/", $destinate ), - 1 ) == "/" ? $destinate : $destinate . "/";
  if (! is_writable ( $destinate )) {
   $this->show_warning ( '文件目录发生错误' );
   exit ();
  }
 }
 $filename = date ( "YmdHis" ) . (microtime () * 1000000) . "." . $arr [$count - 1];
 
 if (is_file ( $destinate . $filename )) {
  up_file ( $inputname, $destinate = "", $type = "", $maxSize = 0 );
 } else {
  $filename = $filename;
 }
 copy ( $_FILES [$inputname] ['tmp_name'], $destinate . $filename );
 @unlink ( $_FILES [$inputname] ['tmp_name'] );
 return $filename;
}

<input name="userfile" type="file">
改成

<input name="userfile[]" type="file">
<input name="userfile[]" type="file">
<input name="userfile[]" type="file">

<?php
echo strtoupper("Hello WORLD!");
?>

输出：

HELLO WORLD!

<?php
$foo = 'where are doing?!';
$foo = ucfirst($foo);             // where are doing?!

$bar = 'where are doing?!';
$bar = ucfirst($bar);             // where are doing?!
$bar = ucfirst(strtolower($bar)); // where are doing?!
?>

<?php
$str = "Mary Had A Little Lamb and She LOVED It So";
$str = strtolower($str);
echo $str; // Prints mary had a little lamb and she loved it so
?>

<?php
$foo = 'where are doing?!';
$foo = ucwords($foo);             // Where are doing?!

$bar = 'where are doing?!';
$bar = ucwords($bar);             // Where are doing?!
$bar = ucwords(strtolower($bar)); // Where are doing?!
?>

<?php
$foo = 'HelloWorld';
$foo = lcfirst($foo);             // where are doing

$bar = 'where are doing?!';
$bar = lcfirst($bar);             // where are doing?!
$bar = lcfirst(strtoupper($bar)); // where are doing?!
?>