我目前只是在空闲时间编写代码并跟进其他开发人员/编码人员在业余时间创建的随机教程。现在我被一些非常小的东西困住了。我一直试图在interwebz上找到答案,但我似乎无法找到一个,所以在这里我希望有人愿意阅读我的PHP和HTML并看到我创建的错误。
但在分享我的代码之前,让我告诉你我的问题是什么以及我想要实现的目标。 如果您转到以下链接“已删除,因为问题已解决。”,当您单击主页/关于/服务/随机时,您可以编辑其中一个菜单。 (标题,位置,可见)。现在,当我想将菜单名称“Home”更改为“Welcome”时,它正确执行我的SQL但由于某种原因,在HTML表单中加载它的先前信息。我可以做的是复制PHP并将其保存在一个新的php文件中,当点击提交时,它将同时更改menu / title / html表单,但它不再显示我的成功和失败消息。我希望你们中的任何一个人都能理解我在这里要解释的内容并尝试实现。现在让我们共享代码。
PHP
<? find_selected_page(); ?>
<?
if (intval($_GET['info']) == 0){
redirect_to("content.php");
}
if(isset($_POST['submit'])){
$errors = array();
$required_fields = array('menu', 'position', 'visible');
foreach ($required_fields as $fieldname){
if (!isset($POST[$fieldname]) || (empty($_POST[$fieldname]) &&
!is_numeric($_POST[$fieldname]))) {
$errors [] = $fieldname;
}
}
$fields_with_lengths = array('menu' => 30);
foreach($fields_with_lengths as $fieldname => $maxlength) {
if(strlen(trim(mysql_prep($_POST[$fieldname]))) > $maxlength){
$errors[] = $fieldname;
}
}
$id = mysql_prep($_GET['info']);
$menu = mysql_prep($_POST['menu']); //use post array cuz we used post var to coll val in form
$position = mysql_prep($_POST['position']);
$visible = mysql_prep($_POST['visible']);
$query = "UPDATE information SET menu = '{$menu}', position = {$position}, visible = {$visible} WHERE id = {$id}";
$result = mysql_query($query, $connection);
if (mysql_affected_rows() == 1) {
$message = "The information was correctly updated.";
} else {
//failed
}
} else { //errors
}
?>
HTML
<? require_once ("includes/functions.php"); ?>
<? require_once ("includes/connect.php"); ?> //HERE IS MY CONNECTION TO MY DATABASE
///HERE IS MY PHP CODE
<? include ("includes/header.php"); ?>
<div id="content"> <!-- content here -->
<table id="table">
<tr>
<td id="nav">
<? echo navigation($sel_table1, $table2); ?>
</td>
<td id="main">
<h2>Edit Info <? echo $sel_table1['menu']; ?></h2>
<? if (!empty($message)) { echo "<p class=\"message\">" . $message . "</p>";} ?>
<form action="edit_info.php?info=<? echo urlencode($sel_table1['id']); ?>" method="post"/>
<p>Menu title
<input type="text" name="menu" value="<? echo ($sel_table1['menu']); ?>" id="menu">
</p>
<p>Position
<select name="position">
<?
$info_set = get_all_info();
$info_count = mysql_num_rows($info_set); //asks how many rows there are should be 3
for($count=1; $count <= $info_count+1; $count++){
echo "<option value='{$count}'";
if($sel_table1['position'] == $count){
echo "selected";
}
echo ">{$count}</option>";
}
?>
</select>
</p>
<p>Visible:
<input type="radio" name="visible" value="0"
<? if ($sel_table1['visible'] == 0){ echo "checked"; } ?>
/>No
<input type="radio" name="visible" value="1"
<? if ($sel_table1['visible'] == 1){ echo "checked"; } ?>
/>Yes
</p>
<input type="submit" name='submit' value="Edit information" />
</form> <br>
<a href="content.php">Cancel</a>
</td>
</tr>
</table>
</div>
<? include ("includes/footer.php");?> //HERE I HAVE IF ISSET MYSQL CLOSE
这个故事的一个更简单的简短版本是,我想用成功和失败消息更新菜单,而不是在HTML格式中获取旧的先前数据
如果出于任何原因我需要包含我的functions.php部分,其中$ sel_table和$ table2将保留。
function find_selected_page(){
global $sel_table1;
global $table2;
if (isset($_GET['info'])){
$sel_table1 = get_info_by_id($_GET['info']);
$sel_t2 = 0;
$table2 = NULL;
} else if (isset($_GET['page'])){
$table1 = 0;
$sel_table1 = NULL;
$table2 = get_pages_by_id($_GET['page']);
} else {
$table1 = NULL;
$sel_table1 = NULL;
$table2 = 0;
}
}
function navigation($sel_table1, $table2){
$output = "<ul class='info'>";
$info_set = get_all_info();
while ($info = mysql_fetch_array($info_set))
{
$output .= "<li"; if ($info["id"] == $sel_table1 ["id"]){
$output .= " class='selected'";
}
$output .= "><a href='edit_info.php?info=" . urlencode($info["id"]) . "'>{$info['menu']}</a></li>";
$page_set = get_pages_for_info($info["id"]);
$output .= "<ul class='pages'>";
while ($page = mysql_fetch_array($page_set))
{
$output .= "<li"; if ($page["id"] == $table2 ["id"]){
$output .= " class='selected'";
}
$output .= "><a href='content.php?page=" . urlencode($page["id"]) . "'>{$page['menu']}</a></li>"; }
$output .= "</ul>";
}
$output .= "</ul>";
return $output;
}