怀疑PHP中的代码相关会话 [英] doubt in code related sessions in php
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问题描述
arraysession.php
1：<？php
2：session_start（）;
3：？>
4：< ！DOCTYPE html >
5：< html >
6：< head >
7：< title < span class =code-keyword>> 使用会话存储数组< / title >
8：< / head >
9：< body >
10：< h1 > 产品选择页< / h1 >
11：<？ php
12： if （isset（$ _ POST ['form_products']））{
13： if （！empty（$ _ SESSION ['products']））{
14： $ products = array_unique（
15：array_merge（unserialize（$ _ SESSION ['products']），
16：$ _POST ['form_products']））;
17：$ _SESSION ['products'] =序列化（$ products）;
18：} else {
19：$ _SESSION ['products'] = serialize（$ _ POST ['form_products']）;
20：}
21： echo < p>您的商品已注册！< / p>;
22：}
23：？>
24：< 表格 方法 = 发布 action = <？php echo $ _SERVER ['PHP_SELF']; ??> >
25：< p > < 标签 = form_products > 选择一些产品：< / label > < ; br / < span class =code-keyword>>
26：< select id = form_products 名称 = form_products [] 多个 = multiple
size = 3 >
27：< span class =code-keyword>< 选项 value = Sonic Screwdriver > 声波螺丝刀< / option >
28：< 选项 value = Hal 2000 > Hal 2000 < / option >
29：< 选项 value = Tardis > Tardis < / option >
30：< span class =code-keyword>< 选项 value = ORAC > ORAC < / option >
31：< 选项 value = 运输车手链 > 运输车手链< < span class =code-leadattribute> / option >
32：< / select > < / p >
33：< ; 按钮 type < span class =code-keyword> = 提交 名称 = 提交 value = 选择 > 提交表单< / button >
34：< / form >
35： < p > < a href = session1.php > 转到内容页< / a < span class =code-keyword>> < / p >
36：< / body >
37：< / html >
session6.php
1：<？php
2：session_start（）;
3：？>
4：< ！DOCTYPE html >
5：< html >
6：< head >
7：< title < span class =code-keyword>> 访问会话变量< / title >
8：< / head >
9：< body >
10：< h1 > 内容页面< / h1 >
11：<？ php
12： if （isset（$ _ SESSION ['products']））{
13： echo < strong>您的购物车：< / strong>< ol>;
14： foreach （反序列化（$ _ SESSION ['products]） as $ p）{
15： echo < li> 。$ p。 < / li> ;;
16：}
17：echo < / ol > ;
18：}
19：？>
20：< p>< a href = arraysession.php >返回产品选择页< / a>< / p>
注意
www.it-
添加的代码块[/ Edit ]
解决方案
检查POST [''form_products]它被定义了。然后
_SESSION [''products'']是否为空，但条件不满意，但在书中他们给出的条件是满意的。请你澄清我怎么。为什么他们使用序列化和unserialize.i已经采取这个代码为sams教你自己的PHP。请帮助我理解这段代码
arraysession.php
1：<？php
2 ：session_start（）;
3：？>
4：< ！DOCTYPE html >
5：< html >
6：< head >
7：< title < span class =code-keyword>> 使用会话存储数组< / title >
8：< / head >
9：< body >
10：< h1 > 产品选择页< / h1 >
11：<？ php
12： if （isset（
_POST ['form_products']））{
13： if （！empty（
Iam abeginner in php coding.i have doubt in 12 to 19 lines in arraysession.php.when form is submited,$POST[''form_products] is checked wheter it is defined.then $_SESSION[''products'']is cheked whether it is empty but condition not satisgfied,but in the book they gave condition is satisfied.can u please clarify me how .why they have used serialize and unserialize.i have taken this code for "sams teach ur self php".please help me to understand this code
arraysession.php
1: <?php
2: session_start();
3: ?>
4: <!DOCTYPE html>
5: <html>
6: <head>
7: <title>Storing an array with a session</title>
8: </head>
9: <body>
10: <h1>Product Choice Page</h1>
11: <?php
12: if (isset($_POST[‘form_products’])) {
13: if (!empty($_SESSION[‘products’])) {
14: $products = array_unique(
15: array_merge(unserialize($_SESSION[‘products’]),
16: $_POST[‘form_products’]));
17: $_SESSION[‘products’] = serialize($products);
18: } else {
19: $_SESSION[‘products’] = serialize($_POST[‘form_products’]);
20: }
21: echo "<p>Your products have been registered!</p>";
22: }
23: ?>
24: <form method="post" action="<?php echo $_SERVER[‘PHP_SELF’]; ??>">
25: <p><label for="form_products">Select some products:</label><br />
26: <select id="form_products" name="form_products[]" multiple="multiple"
size="3">
27: <option value="Sonic Screwdriver">Sonic Screwdriver</option>
28: <option value="Hal 2000">Hal 2000</option>
29: <option value="Tardis">Tardis</option>
30: <option value="ORAC">ORAC</option>
31: <option value="Transporter bracelet">Transporter bracelet</option>
32: </select></p>
33: <button type="submit" name="submit" value="choose">Submit Form</button>
34: </form>
35: <p><a href=""session1.php"">go to content page</a></p>
36: </body>
37: </html>
session6.php
1: <?php
2: session_start();
3: ?>
4: <!DOCTYPE html>
5: <html>
6: <head>
7: <title>Accessing session variables</title>
8: </head>
9: <body>
10: <h1>Content Page</h1>
11: <?php
12: if (isset($_SESSION[‘products’])) {
13: echo "<strong>Your cart:</strong><ol>";
14: foreach (unserialize($_SESSION[‘products]) as $p) {
15: echo "<li>".$p."</li>;
16: }
17: echo "</ol>";
18: }
19: ?>
20: <p><a href=""arraysession.php"">return to product choice page</a></p>
NOTE
www.it-
[Edit]Code blocks added[/Edit]
解决方案
POST[''form_products] is checked wheter it is defined.then
_SESSION[''products'']is cheked whether it is empty but condition not satisgfied,but in the book they gave condition is satisfied.can u please clarify me how .why they have used serialize and unserialize.i have taken this code for "sams teach ur self php".please help me to understand this code
arraysession.php
1: <?php 2: session_start(); 3: ?> 4: <!DOCTYPE html> 5: <html> 6: <head> 7: <title>Storing an array with a session</title> 8: </head> 9: <body> 10: <h1>Product Choice Page</h1> 11: <?php 12: if (isset(
_POST[‘form_products’])) { 13: if (!empty(
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