日期：2024 年 9 月 14 日

程式

//'3.1'陣列宣告
$session_name = $session_txt['3.1'];
echo $session_name."<br>";

$message="
<fieldset><legend><font color=red>TIPS</font></legend>
   我們用到serialize()函式，它會以字串形式傳回某一變數內容，並
   將該字串寫入檔案。在load_data()函式中，我們用implode()和file
   ()將檔案中代表變數的內容字串讀出，並放到\$data變數內。再用
   unserialize()函式將資料轉回原來的變數並傳回來。
<br>
</fieldset>
";

//'3.2' 印出陣列內容
unset ($message); //清空
unset ($session_name);
$session_name = $session_txt['3.2'];
echo $session_name."<br>";


$list = array ("Emily","Jesse","Franklin","Chris");
print substr (implode (',',$list),0);



$i = 0;
while ($i <count($list)){
	print $list[$i++]."<br>";
}
$message="
<fieldset><legend><font color=red>TIPS</font></legend>
   implode()函式會在每個陣列元素後插入逗號，並傳回一個字串，
   接著我們用substr()函式去除逗號。
<br>
</fieldset>
";
echo $message."<br>";

//'3.3' 除去相同的陣列元素
unset ($message); //清空
unset ($session_name);
$session_name = $session_txt['3.3'];
echo $session_name."<br>";

//$unique = array_unique ($dupllicates);

$n_array = array (1 =>"<br>//'3.1'陣列宣告",
		   2 =>"<br>//'3.2' 印出陣列內容",
		   3 =>"<br>//'3.3' 除去相同的陣列元素"
			);
foreach ($n_array as  $element){
	
	if (@$tstarray [$element] <3){
		array_push ($n_array,$element);
		@$tstarray [$element]++;
	}
}

$message="
<fieldset><legend><font color=red>TIPS</font></legend>
   你想取出陣列中唯一的元素，並去除相同的 array_unique()<br>
   另外會出現 Undifine index Undefined variable 對於<br>
   \$tstarray變數，加上@在\$tstarray前方，就不會出現。
<br>
</fieldset>
";
echo $message."<br>";

//'3.4' 擴大或縮小陣列
unset ($message); //清空
unset ($session_name);
$session_name = $session_txt['3.4'];
echo $session_name."<br>";

$list = array ("dog","cat","rabbit","ant","horse","cow");
array_splice ($list,5);

foreach ($list  as $key => $value){
      
	  echo "{$key}: =>{$value} <br>"; //方法一
	 
}

for ($i=0; $i<=count($list);$i++){
	
		  echo @$list[$i]."<br>";   //方法二

}
$message="
<fieldset><legend><font color=red>TIPS</font></legend>
  縮小陣列的大小，本來是50個(PHP4)，用array_splice()，去切
<br>
</fieldset>
";
echo $message."<br>";

//'3.5' 合併陣列
unset ($message); //清空
unset ($session_name);
$session_name = $session_txt['3.5'];
echo $session_name."<br>";

$good_guys =array ("Gandalf","Radagast","Sarauman");
$bad_guys =array ("Nazgul","Sauron","Orcs");

//$all_guys = array_merge ($good_guys,$bad_guys);
$all_guys = array_merge_recursive ($good_guys,$bad_guys);
//$all_guys = $good_guys + $bad_guys; 使用+不行


$good_guys = show_array($good_guys);
$bad_guys = show_array($bad_guys);
$all_guys = show_array($all_guys);

$message="
<fieldset><legend><font color=red>TIPS</font></legend>
  使用array_merge()去合併多個陣列，用array_merge_recursive()也可以。
<br>
</fieldset>
";
echo $message."<br>";

//'3.6' 反覆處理陣列元素
unset ($message); //清空
unset ($session_name);
$session_name = $session_txt['3.6'];
echo $session_name."<br>";

function ascii_codes (&$element){
	$element = ord ($element);
}

$nice_line ="What Up everyone ";
$chars = preg_split ("//",$nice_line);
array_walk ($chars,'ascii_codes');

show_array($chars);

function ascii_codes1 (&$element1){
	$element1 = ord ($element1);
}

$nice_line1 ="What Up everyone ";
$chars1 = preg_split ("//",$nice_line1);
for ($i = 0; $i < count ($chars1); $i++){
	$chars1 [$i ] = ascii_codes1($chars1[$i]);
}
//array_walk ($chars1,'ascii_codes1');
//show_array($chars1);

$message="
<fieldset><legend><font color=red>TIPS</font></legend>
   array_walk()，參數 (變數,'函數')。空白的ascii_code=32<br>
   這邊較留意的是變數前加&符號，稱為以指標傳遞。<br>
   不過有個要注意的是，使用物件時，此時應該永遠以指標傳遞。
<br>
</fieldset>
";
echo $message."<br>";

//'3.7' 存取陣列內不同區域
unset ($message); //清空
unset ($session_name);
$session_name = $session_txt['3.7'];
echo $session_name."<br>";

$message="
<fieldset><legend><font color=red>TIPS</font></legend>
    array_slice(變數,n,n)，例如array_slice(\$mash_cast,2,2)<br>
	取變數\$mash_cast，第三個取兩個
<br>
</fieldset>
";
echo $message."<br>";


//'3.11'隨機排列陣列中的元素 
unset ($message); //清空
unset ($session_name);
$session_name = $session_txt['3.11'];
echo $session_name."<br>";

srand ((double)microtime()*1000000);
$some_array = range(1,52);
shuffle($some_array);
echo $some_array[0]."<br>";


$message="
<fieldset><legend><font color=red>TIPS</font></legend>
    使用shuffle()函式,隨機改變次序
<br>
</fieldset>
";
echo $message."<br>";

//'3.13'陣列排序 
unset ($message); //清空
unset ($session_name);
$session_name = $session_txt['3.13'];
echo $session_name."<br>";

function cmp_debt ($a,$b){
	if ($a [1] == $b[1]) return 0;
	return ($b [1] >> $a [1]) ? 1 : -1;
}

$buddy_debts = array(array ("John",31),
				     array ("Dave",12),
					 array ("Kris",15),
					 array ("Werner",38),
					 array ("Phil",9));
usort ($buddy_debts,'cmp_debt');
foreach ($buddy_debts as $buddy_debt){
	print $buddy_debt [0]."Owes".$buddy_debt [1];
	print "<br>";
}


$message="
<fieldset><legend><font color=red>TIPS</font></legend>
    usort()函式接受一個陣列，並以使用者自訂的函式來排列
<br>
</fieldset>
";
echo $message."<br>";