日期：2024 年 9 月 23 日

PHP4-chap7

正規表式

程式碼

//'7'正規表示式
$session_name = $session_txt['7.1'];
echo $session_name."<br>";
$message="
<fieldset><legend><font color=red>TIPS</font></legend>
    ereg()   int ereg(string pattern, string string [, array regs])<br>
    這函式會以pattern 中所指定的正規表示式來搜尋對應字串，並以陣列方式傳回。	
<br>
</fieldset>
";
echo $message."<br>";

//$datesever=$_SERVER['REQUEST_TIME'];
//echo $datesever."<br>";
$datestr=date("m-d-Y");
echo $datestr."<br>";
$date = $datestr;

if (ereg("([0-9]{1,2})-([0-9]{1,2})-([0-9]{4})", $date, $regs)){
	echo ("$regs[2].$regs[1].$regs[3]");
}else{
	echo ("Invalid date format: $date");
}
$message="
<fieldset><legend><font color=red>TIPS</font></legend>
    ereg_replace()   (string pattern, string replace, string string )<br>
    這是個將字串中的pattern 以replacement來代替的函式。這個函式會傳回所找到並加以修改<br>
	過的字串加以運用。
	
<br>
</fieldset>
";
echo $message."<br>";

$num = '10';
$string = 'Ten Little Indians sitting ....';
echo "Befor: ". $string."<br>";
$string = ereg_replace('Ten', $num, $string);
echo "After: ". $string."<br>";

echo $breakstr."<br>";
$message="
<fieldset><legend><font color=red>TIPS</font></legend>
    eregi()   int ereg(string pattern, string string [, array regs])<br>
	這個函式和ereg()相同，只不過它忽略了對應到字母字元的狀況。<br>
	eregi_replace()   (string pattern, string replace, string string )<br>
	這個函式和ereg_replace()相同，只不過它忽略了對應到字母字元的狀況。<br>
<br>
</fieldset>
";
echo $message."<br>";
$message="
<fieldset><legend><font color=red>TIPS</font></legend>
    split()   array split(string pattern, string string [, int limit])<br>
	這個函式會傳回一個字串陣列，其中每一個都是以正規表示式pattern所形成的子字串的邊界所<br>
	區隔而成的字串。當limit引數有指定時，則所傳回的陣列會包含最多limit個元素，而其餘的<br>
	元素則包含在string引數中。<br>
	spliti()和split()相同，只不過它在對應字母時會忽略大小寫。
<br>
</fieldset>
";
echo $message."<br>";

$date = "19/Sep/1966 is my date of birth";

$array_date = split('[/.-]', $date, 4);
echo "Day: ".$array_date[0]. "Month: ".$array_date[1]."
		Year:". $array_date[2];
echo "<br>";
echo $array_date[3];


echo $breakstr."<br>";

PHP4-chap5

物件導向

程式碼

//'5.3'以PHP進行物件導向程式設計-繼承
$session_name = $session_txt['5.3'];
echo $session_name."<br>";

//這個方法比較複雜
$mediaItems = array();
$books = array();
$cds = array();

$item->id			=1;
$item->type			="book";
$item->name			="Professional PHP4";
$item->inStock		=33;
$item->price		=49.95;
$item->rating		=5;
$mediaItems[]	=$item;

$book->isbn			=124465343442;
$book->author		="Ken Egervari";
$book->numberOfPages	=500;
$books[$item->id]	=$book;

$item->id			=2;
$item->type			="cd";
$item->name			="This way";
$item->inStock		=120;
$item->price		=16.94;
$item->rating		=4;
$mediaItems[]	=$item;

$cd->serialNo		=323254354;
$cd->artist			="Jewel";
$cd->numberOfTradks	=13;
$cds[$item->id]	=$cd;

foreach ($mediaItems as $item){
	echo ("Name: " .$item->name. "<br>");
	echo ("Items in stock: " .$item->inStock. "<br>");
	echo ("Price: " .$item->price. "<br>");
	echo ("Rating: " .$item->rating. "<br>");
	
	switch ($item->type){
		case 'cd':
			echo ("Serial No: " .$cds[$item->id]->seriaNo. "<br>");
			echo ("Artist: " .$cds[$item->id]->artist. "<br>");
			echo ("# of Tracks: " .$cds[$item->id]->numberOfTradks. "<br>");
			break;
			
		case 'software':
			break;
		
		case 'movie':
			break;
			
		case 'book':
			break;
	}
}

//用class 繼承 extends
//Media.php
define ("MIN_RATING", 0);
define ("MAX_RATING", 5);


class Media
{
	var $id;
	var $name;
	var $inStock;
	var $price;
	var $rating;
	
	function Media ($id,$name,$inStock,$price,$rating)
	{
		if ($inStock < 0) $inStock = 0;
		if ($price < 0) $price =0;
		if ($rating < MIN_RATING) $rating = MIN_RATING;
		if ($rating > MAX_RATING) $rating = MAX_RATING;
			$this->id = $id;
			$this->name = $name;
			$this->inStock = $inStock;
			$this->price = $price;
			$this->rating = $rating;
	}
	
	function buy()
	{
		$this->inStock--;
	}
	
	function display()
	{
		echo "name: " .$this->name. "<br>";
		echo "Items in stock: " .$this->inStock. "<br>";
		echo "Price: " .$this->price. "<br>";
		echo "Rating: " .$this->rating. "<br>";
	}
}

//Book.php
class Book  extends Media
{
	var $isbn;
	var $author;
	var $numberOfPages;
	
	function Book($id, $name, $inStock, $price, $rating,
				  $isbn, $author, $numberOfPages)
	{
		$this->Media($id, $name, $inStock, $price, $rating);
		$this->isbn = $isbn;
		$this->author = $author;
		$this->numberOfPages = $numberOfPages;
	}
	
	function display()
	{
		Media::display();
		
		echo "ISBN: ". $this->isbn. "<br>";
		echo "Author: ". $this->author. "<br>";
		echo "number of pages: ". $this->numberOfPages. "<br>";
	}
					  
}		 
		
$book = new Book(0,'PHP Programming',23,59.99,4,'124-4333-4443',
					'Ken Egervari',1024);
$book->display();
			


$message="
<fieldset><legend><font color=red>TIPS</font></legend>
    class檔案：Media.php、主程式檔：Book.php<br>
	要注意的是，我們所有的媒體在建構後都有相同的行為。所有的display()方法<br>
	都不受引數，並且會適當地顯示每一個不同媒體項目。
<br>
</fieldset>
";
echo $message."<br>";

PHP4-chap3

字元與運算子

程式碼

//'3.1'跳脫字元
$session_name = $session_txt['3.1'];
echo $session_name."<br>";
//$text = "This text goes\nacross several\nlines\t\"and this quotion is indented\"";
echo nl2br("This text goes\nacross several\nlines\t\"and this quotion is indented\"");

$message="
<fieldset><legend><font color=red>TIPS</font></legend>
   我們會用到\符號來跳脫後面的符號，至於N->斷行、T->定位<br>
   都沒有用，要能有用，必須加上<font color=red>nl2br()</font>函式來轉換。
<br>
</fieldset>
";

echo $message."<br>";
//'3.2'運算子
$session_name = $session_txt['3.2'];
echo $session_name."<br>";

@define(CREATE_RECORDS, 1);
@define(DELATE_RECORDS, 2);
@define(ALTER_RECORDS, 4);
@define(ADMINISTATOR, 8);

$user_permissions = CREATE_RECORDS |ALTER_RECORDS;

echo (($user_permissions & CREATE_RECORDS) ? "user can creats records<br>" : "");

@define (TWO, 2);
@define (FOUR, 4);

echo (TWO << FOUR)."<br>";
echo (FOUR >> TWO)."<br>";

//$Myconn=$conn;  //使用mysqli_connect連線

$message="
<fieldset><legend><font color=red>TIPS</font></legend>
   位元運算子：且(&)、或(|)、互斥(^)、補數(~)、左移(<<)、右移(>>)<br>
  左移(Shift Left)：<br>
     echo 11<<2;<br> 
     11往左邊移動2個位元，output:44<br>
     左移運算就是將全部位元往左移兩格，然後右邊補上0<br>
     11(1011) ->左移一次，右邊補0-> 22(10110) ->左移一次，右邊補0-> 44(101100)<br>
   <br>
   數值運算子：相加(+)、相乘(*)、相減(-)、相除(/)、餘數運算子(%)。<br>
    <br>
   比較運算子：小於(<)、小於等於(<=)、大於(>)、大於等於(>=)。傳回true或false<br>
     <br>
   邏輯運算子：且(and或&&)、或(or或||)、非(!)、互斥(xor)。傳回true或false<br><br>
</fieldset>
";

echo $message."<br>";