问题
I have imported a set of different values from two different tables in phpMyAdmin, one from Category table (where cat_id is a PK) and another from Item table; where (cat_id is a FK).
<?php
require ('config.php');
$que = "SELECT * FROM category";
$run = mysql_query($que);
$j = 0;
while($row = mysql_fetch_array($run))
{
$cat_idd[$j] = $row['cat_id'];
$cat_namee[$j] = $row['cat_name'];
$j++;
}
for($i = 0; $i < count($cat_idd); $i++)
{
$que2 = "SELECT * FROM item WHERE cat_id = '$cat_idd[$i]' ";
$result = mysql_query($que2);
$run = mysql_num_rows($result);
echo "<a href=''>".$cat_namee[$i]."(".$run.")</a><br>";
}
?>
Here is what I have so far:
Now how do I expand it? or for example, how do I show the two items that are stored in the category named Clothing on the same page or next? Since this code only helps me to view the number of items stored inside the database,
Here is my form:
<form name = "view" method = "POST" action ="cart.php">
<table align = 'center' width = '100%' border = '4'>
<tr bgcolor = 'yellow'>
<td colspan = '20' align = 'center'><h2> Viewing all the Products </td>
</tr>
<tr align = 'center'>
<th>Item ID</th>
<th>Name</th>
<th>Price</th>
<th>Select</th>
</tr>
<tr class = "odd">
<?php
require ('config.php');
$que = "SELECT * FROM category";
$run = mysql_query($que);
$j = 0;
while($row = mysql_fetch_array($run))
{
$cat_idd[$j] = $row['cat_id'];
$cat_namee[$j] = $row['cat_name'];
$j++;
}
I thought of using an array function to store the value inside a category i.e Clothing(2) => 2.
function array_insert(&$array, $position, $insert)
{
if (is_int($position)) {
array_splice($array, $position, 0, $insert);
} else {
$pos = array_search($position, array_keys($array));
$array = array_merge(
array_slice($array, 0, $pos),
$insert,
array_slice($array, $pos)
);
}
}
$arr = array();
$arr[] = 2;
for($i = 0; $i < count($cat_idd); $i++)
{
$que2 = "SELECT * FROM item WHERE cat_id = '$cat_idd[$i]'";
$result = mysql_query($que2);
$run = mysql_num_rows($result);
echo "<a href=''>".$cat_namee[$i]."(".$run.")</a><br>";
array_insert($arr, 0, "$run");
// echo $arr[0];
}
$que2 = "SELECT * FROM item WHERE cat_id = '1'"; //instead of using '1' i wish to use the one user clicks on!
$res2 = mysql_query($que2);
while($row = mysql_fetch_array($res2))
{
$i_id = $row['item_id'];
$i_namee = $row['item_name'];
$i_price = $row['item_price'];
?>
<td><?php echo $i_id; ?></td>
<td><?php echo $i_namee; ?></td>
<td><?php echo $i_price; ?></td>
<td><input type="checkbox" name="addcart" value="<?php echo $item; ?>" onClick="return KeepCount()" />Tick</td>
</tr>
<?php } ?>
<br><br>
</table>
<input type = "hidden" name = "check">
<button type= "submit" onclick = "location.href = 'cart.php';" id = "cart" style="float:right; margin-top: 30px; margin-right: 10px;">Add to Cart</button>
The above image is the result what I want, this one is specific for Clothing(2) only. I want it to change as the user clicks on something else for example, Shoes(1).
回答1:
You've issued the correct query to get all of the data information about an item. However, instead of getting the contents of each field, you've elected only to count the number of rows affected. By using mysql_fetch_array() you actually get the contents of each field and you can display the results.
Consider the following example based on your code:
for($i = 0; $i < count($cat_idd); $i++)
{
$que2 = "SELECT * FROM item WHERE cat_id = '$cat_idd[$i]' ";
$result = mysql_query($que2);
$run = mysql_num_rows($result);
echo "<a href=''>".$cat_namee[$i]."(".$run.")</a><br>";
while($row = mysql_fetch_array($result)){
//Change ['item_name'] and ['item_description'] to match your DB schema.
echo "item name: $row['item_name']";
echo "item description: $row['item_description']";
}
}
$row is an array (that is both associative and numerically indexed) containing all the data you are looking for. In my example, I assume the items table has a field named item_name and item_description. Your table probably has different columns names and you will need to change it to match your column names.
More info on mysql_fetch_array():http://php.net/manual/en/function.mysql-fetch-array.php
Finally, you should know that the mysql extension is deprecated as of PHP 5.5. You should strongly consider moving to either mysqli or PDO.
More info on mysqli: http://php.net/manual/en/book.mysqli.php
More info on PDO: http://php.net/manual/en/book.pdo.php
回答2:
So after spending almost a day or two I have finally got a way out of this and I'm posting the answer here so if anyone else comes here looking for it.
<?php
require ('config.php');
$que = "SELECT * FROM category";
$run = mysql_query($que);
$j = 0;
while($row = mysql_fetch_array($run))
{
$cat_idd[$j] = $row['cat_id'];
$cat_namee[$j] = $row['cat_name'];
$j++;
}
for($i = 0; $i < count($cat_idd); $i++)
{
$que2 = "SELECT * FROM item WHERE cat_id = '$cat_idd[$i]' ";
$result = mysql_query($que2);
$run = mysql_num_rows($result);
echo "<a href='c.php?id=$cat_idd[$i]'>".$cat_namee[$i]."(".$run.")</a><br><br>";
}
?>
<?php
require('config.php');
if(isset($_GET['id']))
{
$cat_id = $_GET['id'];
$que = "SELECT * FROM item WHERE cat_id = '$cat_id'";
$run = mysql_query($que);
?>
<br><br>
<form name = "view" method = "POST" action ="cart.php">
<table align = 'center' width = '100%' border = '4'>
<tr>
<td colspan = '20' align = 'center'><h2> Viewing all the Products </h2></td>
</tr>
<tr align = 'center'>
<th>Item ID</th>
<th>Name</th>
<th>Price</th>
<th>Select</th>
</tr>
<tr align = 'center' class = "odd">
<?php
while($row = mysql_fetch_array($run))
{
$i_id = $row['item_id'];
$i_name = $row['item_name'];
$i_price = $row['item_price'];
?>
<td><?php echo $i_id; ?></td>
<td><?php echo $i_name; ?></td>
<td><?php echo $i_price; ?></td>
<?php
$item = $i_name ." ". $i_price;
?>
<td><input type="checkbox" name="addcart[]" value="<?php echo $item; ?> />Tick</td>
</tr>
<?php }?><input type = "hidden" name = "check">
<button type= "submit" onclick = "location.href = 'cart.php';" id = "cart">Add to Cart</button> <?php } ?>
</table>
来源：https://stackoverflow.com/questions/31733388/how-to-expand-a-category-list-imported-from-mysql