我有一个相当基本的 crud 应用程序网站的问题。我在编辑部分遇到问题,我在页面上有文本输入和选择下拉菜单。对于所有文本输入,我能够使该行的值等于数据库中已有的值,因此,如果我通过 edit.php 并且不编辑某些字段,该值仍然保留对于我没有接触过的领域,没有擦干净。不幸的是,我正在使用 Jquery 来填充一些选择/下拉菜单,所以这种方法不起作用。
示例场景:
我是一名用户,添加一个企业,第一个类别是餐馆,子类别是美国食品,第二个类别是家庭服务,子类别是家庭维修。然后我单击“保存”按钮并插入我的类别。然后我意识到我忘记将我的姓名和电话号码添加到我的列表中,所以我编辑了列表,这次只插入我的姓名和电话号码并将所有其他字段留空。现在,我第一次保存的类别和子类别现在设置为 0 或空白。
我对此的解决方案是填充一些隐藏字段(命名为 beforecat1、beforesubcat1 等),这些字段存储了字段之前的值,然后如果没有触及选择,则插入值隐藏字段。不幸的是,有些东西不起作用。
<?
include('../config.php');
if (isset($_GET['id']) ) {
$id = (int) $_GET['id'];
if (isset($_POST['submitted'])) {
foreach($_POST AS $key => $value) { $_POST[$key] = mysql_real_escape_string($value); }
if(isset($_REQUEST['cselect1'])){
$cselect1 = $_REQUEST['cselect1'];
$query="SELECT cat FROM cat WHERE id='$cselect1'";
$result = mysql_query ($query);
while($catselect=mysql_fetch_array($result)){
$catselect1 = $catselect['cat'];
}
} else {
$catselect1 = $_REQUEST['beforecat1'];
}
if(isset($_REQUEST['cselect2'])){
$cselect2 = $_REQUEST['cselect2'];
$query="SELECT cat FROM cat WHERE id='$cselect2'";
$result = mysql_query ($query);
while($catselect=mysql_fetch_array($result)){
$catselect2 = $catselect['cat'];
}
} else {
$catselect2 = $_REQUEST['beforecat2'];
}
if(isset($_REQUEST['cselect3'])){
$cselect3 = $_REQUEST['cselect3'];
$query="SELECT cat FROM cat WHERE id='$cselect3'";
$result = mysql_query ($query);
while($catselect=mysql_fetch_array($result)){
$catselect3 = $catselect['cat'];
}
} else {
$catselect3 = $_REQUEST['beforecat3'];
}
$sql = "UPDATE `company` SET `name` = '{$_POST['name']}' , `phone` = '{$_POST['phone']}' , `cat1` = '$catselect1' , `cat2` = '$catselect2' , `cat3` = '$cselect3' , `zipcode` = '{$_POST['zipcode']}' , `city` = '{$_POST['city']}' , `address` = '{$_POST['address']}' , `address2` = '{$_POST['address2']}' , `website` = '{$_POST['website']}' , `product1` = '{$_POST['product1']}' , `product2` = '{$_POST['product2']}' , `product3` = '{$_POST['product3']}' , `product4` = '{$_POST['product4']}' , `product5` = '{$_POST['product5']}' , `product6` = '{$_POST['product6']}' , `product7` = '{$_POST['product7']}' , `subcat1` = '{$_POST['sselect1']}' , `subcat2` = '{$_POST['sselect2']}' , `subcat3` = '{$_POST['sselect3']}' WHERE `id` = '$id' ";
mysql_query($sql) or die(mysql_error());
$sql = "UPDATE `company_secondary` SET `company_description` = '{$_POST['description']}' , `since` = '{$_POST['since']}' , `smoking` = '{$_POST['select3']}' , `delivery` = '{$_POST['select5']}' , `alcohol` = '{$_POST['select6']}' , `kids` = '{$_POST['select1']}' , `wheelchair` = '{$_POST['select2']}' , `twitter` = '{$_POST['twitter']}' , `facebook` = '{$_POST['facebook']}' , `youtube` = '{$_POST['youtube']}' , `premium` = '{$_POST['premium']}' , `creditcards` = '{$_POST['select4']}' , `outdoor` = '{$_POST['select7']}' , `featured` = '{$_POST['featured']}' , `shortdesc` = '{$_POST['shortdesc']}' WHERE company_id = '$id' ";
mysql_query($sql) or die(mysql_error());
echo "Edited Row<br/>";
echo "<a href='allbiz.php'>Back To Listing</a>";
}
$row = mysql_fetch_array ( mysql_query("SELECT * FROM company
WHERE id
= '$id' "));
?>
这是我的表单部分:
<form action='' method='POST'>
<p><b>Name:</b><br /><input type='text' name='name' value='<?= $row['name'] ?>' />
<p><b>Phone:</b><br /><input type='text' name='phone' value='<?= stripslashes($row['phone']) ?>' />
<?php
$cat1 = stripslashes($row['cat1']);
$cat2 = stripslashes($row['cat2']);
$cat3 = stripslashes($row['cat3']);
$subcat1 = stripslashes($row['subcat1']);
$subcat2 = stripslashes($row['subcat2']);
$subcat3 = stripslashes($row['subcat3']);
?>
<input type='hidden' value='<?php echo $cat1;?>' name='beforecat1'/>
<input type='hidden' value='<?php echo $cat2;?>' name='beforecat2'/>
<input type='hidden' value='<?php echo $cat3;?>' name='beforecat3'/>
<input type='hidden' value='<?php echo $subcat1;?>' name='beforesubcat1'/>
<input type='hidden' value='<?php echo $subcat2;?>' name='beforesubcat2'/>
<input type='hidden' value='<?php echo $subcat3;?>' name='beforesubcat3'/>
<p><b>Cat1:</b><br />
<?php
$query="SELECT * FROM cat";
$result = mysql_query ($query);
echo"<select name='cselect1' id='cat1'><option value='0'>Please Select A Category</option>";
// printing the list box select command
while($catinfo=mysql_fetch_array($result)){//Array or records stored in $nt
echo "<option value=\"".htmlspecialchars($catinfo['number'])."\">".$catinfo['cat']."</option>";
}
echo"</select>";
?>
<?php
$query="SELECT * FROM subcat";
$result = mysql_query ($query);
echo"<select name='sselect1' id='subcat1'><option value=''>Sub Category</option>";
echo $subcat1;
echo"'>$sucat1</option>";
// printing the list box select command
while($catinfo=mysql_fetch_array($result)){//Array or records stored in $nt
echo "<option value='".htmlspecialchars($catinfo['subcat'])."' class='".$catinfo['catnumber']."'>".$catinfo['subcat']."</option>";
}
echo"</select>";
?>
<?php
$query="SELECT * FROM cat";
$result = mysql_query ($query);
echo"<select name='cselect2' id='cat2'><option value='0'>Please Select A Category</option>";
// printing the list box select command
while($catinfo=mysql_fetch_array($result)){//Array or records stored in $nt
echo "<option value=\"".htmlspecialchars($catinfo['number'])."\">".$catinfo['cat']."</option>";
}
echo"</select>";
?>
<?php
$query="SELECT * FROM subcat";
$result = mysql_query ($query);
echo"<select name='sselect2' id='subcat2'><option value=''>Sub Category</option>";
echo $subcat1;
echo"'>$sucat1</option>";
// printing the list box select command
while($catinfo=mysql_fetch_array($result)){//Array or records stored in $nt
echo "<option value='".htmlspecialchars($catinfo['subcat'])."' class='".$catinfo['catnumber']."'>".$catinfo['subcat']."</option>";
}
echo"</select>";
?>
<?php
$query="SELECT * FROM cat";
$result = mysql_query ($query);
echo"<select name='cselect3' id='cat3'><option value='0'>Please Select A Category</option>";
// printing the list box select command
while($catinfo=mysql_fetch_array($result)){//Array or records stored in $nt
echo "<option value=\"".htmlspecialchars($catinfo['number'])."\">".$catinfo['cat']."</option>";
}
echo"</select>";
?>
<?php
$query="SELECT * FROM subcat";
$result = mysql_query ($query);
echo"<select name='sselect3' id='subcat3'><option value=''>Sub Category</option>";
// printing the list box select command
while($catinfo=mysql_fetch_array($result)){//Array or records stored in $nt
echo "<option value='".htmlspecialchars($catinfo['subcat'])."' class='".$catinfo['catnumber']."'>".$catinfo['subcat']."</option>";
}
echo"</select>";
?>
怎么了?感谢大家的帮助,这个问题困扰我很久了。谢谢!
最佳答案
我认为您的解决方案可能是为您的 <select>
设置默认的选定值从数据库中提取时,无论当前值是什么。
让我们展开这个:
if(isset($_REQUEST['cselect1'])){
$cselect1 = $_REQUEST['cselect1'];
$query="SELECT cat FROM cat WHERE id='$cselect1'";
$result = mysql_query ($query);
while($catselect=mysql_fetch_array($result)){
$catselect1 = $catselect['cat'];
}
} else {
$catselect1 = $_REQUEST['beforecat1'];
}
虽然我不是 100% 确定您在做什么,但您似乎是根据提交的 ID 获取一个值,并将 var $catselect1 设置为类别名称?
我们可以使用其中任何一个,但由于问题的症结在于 $catselect1 让我们使用它。
所以在这里,在这个区域:
<?php
$query="SELECT * FROM cat";
$result = mysql_query ($query);
echo"<select name='cselect1' id='cat1'><option value='0'>Please Select A Category</option>";
// printing the list box select command
while($catinfo=mysql_fetch_array($result)){//Array or records stored in $nt
echo "<option value=\"".htmlspecialchars($catinfo['number'])."\">".$catinfo['cat']."</option>";
}
echo"</select>";
?>
同时,我们需要将 $catselect1 值与我认为是您的类别名称进行比较,使用 $catinfo['cat'](这也是一个名称??)并添加如下条件:
if ( $catselect1 == $catinfo['cat'] )
//this one is selected, because the values match!
echo "<option default selected value=\"".htmlspecialchars($catinfo['number'])."\">".$catinfo['cat']." </option>";
} else {
//do normally
echo "<option value=\"".htmlspecialchars($catinfo['number'])."\">".$catinfo['cat']." </option>";
}
因此,当您的表单加载时,您的选择将默认为数据库中设置的值,如果重新提交,将传递相同的值。
希望这是有道理的!
PS:对于简单的真/假 echo ,我确实更喜欢这种方法:
echo ( $comparison == $comparison ) ? 'true' : 'false';
关于php - Mysql 更新不适用于隐藏字段,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/11731773/