1.
<?PHP
//1
//phpinfo();
//2
//print "hello world";
//3
//$num1 = 8;
//$num2 = 23;
print $_GET['user']."<br/>";
print "Welcome <b>".$_POST['user']."</b><br/>\n\n";
//print $num2;
?>
2.
<!DOCTYPE html PUBLIC
"-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>A PHP Script Including HTML</title>
</head>
<body>
<div><b>
<?php
print "hello world";
?>
</b></div>
</body>
</html>
3.
<?PHP
//const
define ("USER","colorfulgreen"); //定义一个常量
print "Welcome ".USER; //'.'表示连接
print "<br />"; //换行
print "the second line.";
?>
4.
<?php
//程序流程
//switch
$satisfied = "c.g";
if($satisfied == "cg"){
print "go into the if.";
}
else{
print "go into the else.";
}
//switch case
//? :
print "<br />";
$count = 1;
while($count < 12){
print $count."<br />";
$count++;
}
//do
while
//for
//break
//continue
?>
5.
<?php
//func
//ex.1
$num = -321;
$newnum = abs($num);
print $newnum;
//print "<br />";
//ex.2.自定义函数
function bighello()
{
print "<h1>HELLO</h1>";
}
bighello();
//ex.3.带参数
function printBR($txt)
{
print ("$txt<br />\n");
}
printBR("this is the first line.");
printBR("this is the second line.");
//ex.4.A Function That Returns a Value
function addNums($firstnum,$secondnum)
{
$result = $firstnum + $secondnum;
return $result;
}
print "<br />Function That Returns a Value"."<br />";
print addNums(6,5);
//ex.5.Calling a Function Dynamically
//类似与函数指针
print "<br /><br />Calling a Function Dynamically<br />";
function sayHello()
{
print "hello<br />";
}
$function_holder = "sayHello";
$function_holder();
//ex.6.Variable Scope
print "<br /><br />Variable Scope<br />";
function test()
{
$testvariable = "this is a test variable";
}
print "test variable: $testvariable";
//ex.7.global & static
print "<br /><br />global & static<br />";
$num_of_calls = 0;
function numberedHeading($txt)
{
global $num_of_calls;
$num_of_calls++;
print "$num_of_calls.$txt<br />";
}
numberedHeading("the first callglobal");
numberedHeading("the second callglobal");
//用局部静态变量，和上面输出一样
function numberedHeading2($txt)
{
static $num_of_calls2 = 0;
$num_of_calls++;
print "$num_of_calls.$txt<br />";
}
numberedHeading2("the first callglobal");
numberedHeading2("the second callglobal");
//ex.7.A Function Requiring Two Arguments
function headingWrap($txt,$size)
{
print "<h$size>$txt</h$size>";
}
headingWrap("Book title",1);
headingWrap("Chapter title",2);
//ex.8.A Function with an Optional Argument
function headingWrap2($txt,$size = 3)
{
print "<h$size>$txt</h$size>";
}
headingWrap2("Book title",1);
headingWrap2("Chapter title");
//ex.9.Passing an Argument to a Function by Value
function addFive($num)
{
$num +=5;
}
$orignum = 10;
addFive($orignum);
print "$orignum<br />";
//ex.10.Pass an Argument to a Function by Reference
//???
function addFive2(&$num)
{
$num +=5;
}
$orignum2 = 10;
addFive($orignum2);
print "$orignum2<br />";
//ex.11.A Simple Anonymous Function,函数指针
$my_anon = create_function('$a,$b','return $a + $b;');
print $my_anon(3,9);
?>
6.
<?php
//array
//ex.1.
$users = array("Bert","Sharon","Bettery","Harry");
print $users[2]."<br />";
//ex.2.Defining Associative Arrays with the array() Construct
$character = array(
"name" => "bob",
"occupation" => "superhero",
"age" => 30,
"special power" => "x-ray vision"
);
print $character["age"];
//ex.3.Defining a Multidimensional Array
//未完
?>
7.
<?php
/*
//http://localhost/10.php?user=cg&address=192.168.x.x
print "Welcome <b>".$_GET['user']."</b><br/>\n\n";
print "Your address is: <br/><b>".$_GET['address']."</b>";
*/
print $_GET['user']."<br/>";
print "Welcome <b>".$_POST['user']."</b><br/>\n\n";
print "Your address is: <br/><b>".$_POST['address']."</b>";
if ( is_array( $_POST['products'] ) )
{
print "<p>Your product choices are:</p>\n";
print "<ul>\n";
foreach ( $_POST['products'] as $value )
{
print "<li>$value</li>\n";
}
print "</ul>\n";
}
?>