HackMD
PHP 陣列 session cookie POST&GET foreach isset
tags: PHP
陣列
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
rand(min,max)｜ex:rand(0,10)
<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
//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
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
isset ( mixed $var [, mixed $… ] ) : bool
可參考官網說明 https://www.php.net/isset
isset
<?php
if (($_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\" />";
}
?>
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
<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
1.表單傳送頁面
<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>
2. php20191230-1.php 接收頁面
<?php
echo $_POST['name'].",".$_POST['sex'];
?>
作業:綜合應用練習，製作一個表單
<!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>
<!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>
