# PHP 陣列 session cookie POST&GET foreach isset ###### tags: `PHP` ## 陣列 :::info 練習: 試設color陣列，裡面存放yellow、orange、blie、red及green五個字串，請設計一網頁在每次開啟時被景色都會隨機產生 >提示:rand()隨機產生亂數 [color=#ff9c56] >rand(min,max)｜ex:rand(0,10) ::: ```php <head> <style> .body1 { background-color:yellow;} .body2 { background-color:orange;} .body3 { background-color:blue;} .body4 { background-color:red;} .body0 { background-color:green;} </style> </head> <body> <?php //寫法一 $bg = rand(0,4); $color["1"] = "<body class=\"body1\">yellow<div>"; $color["2"] = "<body class=\"body2\">orange<div>"; $color["3"] = "<body class=\"body3\">blue<div>"; $color["4"] = "<body class=\"body4\">red<div>"; $color["0"] = "<body class=\"body0\">green<div>"; echo $color[$bg]; ?> ``` 老師的寫法 ```php= <?PHP //老師的寫法，把PHP放在整個網頁最前面 $color = array ("yellow","red","blue","orange","green"); $a = rand(0,4); ?> <!DOCTYPE html> <html> <head> <title>陣列</title> </head> <body bgcolor="<?php echo $color[$a]; ?>"> </body> </html> ``` --- ## session & cookie :::info 練習: 設計一記錄使用者造訪本網站次數的程式。(使用session) Output:歡迎您第N次造訪本站 >isset()判斷變數是否有被設置 [color=#55ed78] >isset ( mixed $var [, mixed $... ] ) : bool >可參考官網說明 https://www.php.net/isset ::: ## isset ```php= <?php if (($_POST['sex']=='男')){ echo "<img src=\"man.png\" width=\"100\" height=\"100\" alt=\"man\" />"; }else{ echo "<img src=\"woman.png\" width=\"100\" height=\"100\" alt=\"woman\" />"; } ?> ``` ```php= 如果(沒有設置session變數count) 設置session變數count; 再不然 把session變數count+1; <?php session_start(); if(!isset($_SESSION['count'])){ //驚嘆號是none的意思，把句子的意思反過來 $_SESSION['count']=1; }else{ $_SESSION['count']++; } ?> <?php echo "歡迎您第".$_SESSION['count']."次造訪"; ?> ``` --- ## POST&GET ```php= <td width="49%" height="100" align="center" valign="middle"> 生日:<br> <?php echo $_POST['year']."年".$_POST['month']."月".$_POST['day']."日"; ?> </td> <td height="100" align="center" valign="middle"> 興趣:<br> <?php if(!isset($_POST['interest'])){ echo "沒有"; }else{ foreach($_POST['interest'] as $interest){ echo $interest."<br>" ; } } ?> </td> ``` --- 練習: 資料表單傳送 <font color="blue">1.表單傳送頁面</font> ```htmlmixed= <body> <form id="form1" name="form1" method="post" action="php20191230-1.php"> <p>姓名: <input type="text" name="name" id="name" /> </p> <p>性別: <label> <input type="radio" name="sex" value="男生" id="RadioGroup1_0" /> 男生 </label> <label> <input type="radio" name="sex" value="女生" id="RadioGroup1_1" /> 女生</label> </p> <p> <input type="submit" name="button" id="button" value="送出" /> <br /> </p> </form> </body> ``` <font color="blue">2. php20191230-1.php 接收頁面</font> ```php= <?php echo $_POST['name'].",".$_POST['sex']; ?> ``` --- 作業:綜合應用練習，製作一個表單 ```htmlmixed= <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>php作業</title> <style> body{ font-family:'微軟正黑體'; } </style> </head> <body> <form id="form1" name="form1" method="post" action="php_14-2.php"> <table width="300" border="2" align="center" cellpadding="0" cellspacing="0"> <tr> <td valign="middle"><p>姓名： <label for="name4"></label> <input type="text" placeholder="請輸入姓名" name="name" id="name4" /> </p> <p>性別： <label> <input name="sex" type="radio" id="sex_0" value="男" checked="checked" /> 男</label> <label> <input type="radio" name="sex" value="女" id="sex_1" /> 女</label> <br /> </p> <p>生日： <label for="year4"></label> <select name="year" id="year4"> <?php for($i=1910; $i<=2019; $i++){ echo "<option value=\"$i\">$i</option>"; } ?> </select> 年 <label for="month4"></label> <select name="month" id="month4"> <?php for($m=1; $m<=12; $m++){ echo "<option value=\"$m\">$m</option>"; } ?> </select> 月 <label for="day4"></label> <select name="day" id="day4"> <?php for($d=1; $d<=31; $d++){ echo "<option value=\"$d\">$d</option>"; } ?> </select> 日</p> <p>興趣： <label> <input type="checkbox" name="interest[]" value="羽球" id="interest_0" /> 羽球</label> <label> <input type="checkbox" name="interest[]" value="聽音樂" id="interest_1" /> 聽音樂</label> </p> <p>　　　 <label> <input type="checkbox" name="interest[]" value="閱讀" id="interest_2" /> 閱讀</label> <label> <input type="checkbox" name="interest[]" value="游泳" id="interest_3" /> 游泳</label> <br /> </p> <p align="center"> <input type="submit" name="button" id="button" value="送出" /> </p></td> </tr> </table> </form> </body> </html> ``` ```php= <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>php作業-結果</title> </head> <body> <table width="300" border="2" align="center" cellpadding="0" cellspacing="0"> <tr> <td width="49%" height="100" align="center" valign="middle"> <?php //echo $_POST['sex']; //$sex = '男'; if (($_POST['sex']=='男')){ echo "<img src=\"man.png\" width=\"100\" height=\"100\" alt=\"man\" />"; }else{ echo "<img src=\"woman.png\" width=\"100\" height=\"100\" alt=\"woman\" />"; } ?> </td> <td width="49%" height="100" align="center" valign="middle"> 姓名：<br> <?php echo $_POST['name']; ?> </td> </tr> <tr> <td width="49%" height="100" align="center" valign="middle"> 生日:<br> <?php echo $_POST['year']."年".$_POST['month']."月".$_POST['day']."日"; ?> </td> <td height="100" align="center" valign="middle"> 興趣:<br> <?php if(!isset($_POST['interest'])){ echo "沒有"; }else{ foreach($_POST['interest'] as $interest){ echo $interest."<br>" ; } } ?> </td> </tr> </table> </body> </html> ```