在编写我的代码 OO 过程中，遇到了这个问题。接下来的类(class)给了我一个奇怪的问题。当我创建函数 CartTotal() 时，它会回显正确的值，但函数 DisplayListings();没有显示任何 MySQL 数据(都使用 $this->displaylistings)。如果我更改页面上调用这两个函数的顺序，CartTotal();不产生任何结果，并且 DisplayListings();正常工作。所以看起来使用 $this->displaylistings 会把它搞乱。如果您知道我在做什么，请告诉我。这是类:(仍然没有完成并且需要进行一些标准化)。
class Listing {
public $displaylistings;
public $displaycount;
public $viewall;
public $ShopperID;
public $numrows;
public function __construct() {
$Person = new User();
$ShopperID = mysql_query("SELECT * FROM users WHERE Username = '$Person->username'");
$row_ShopperID = mysql_fetch_object($ShopperID);
$this->ShopperID = $row_ShopperID->UserID;
$this->displaylistings=mysql_query("SELECT * FROM nordstromlisting WHERE ShopperID = '$this->ShopperID'
UNION ALL SELECT * FROM saksfifthavenuelisting WHERE ShopperID = '$this->ShopperID'
UNION ALL SELECT * FROM guesslisting WHERE ShopperID = '$this->ShopperID'
UNION ALL SELECT * FROM gnclisting WHERE ShopperID = '$this->ShopperID'
UNION ALL SELECT * FROM urbanoutfitterslisting WHERE ShopperID = '$tnis->ShopperID'
UNION ALL SELECT * FROM bananarepubliclisting WHERE ShopperID = '$this->ShopperID'
UNION ALL SELECT * FROM americaneaglelisting WHERE ShopperID = '$this->ShopperID'
UNION ALL SELECT * FROM neimanmarcuslisting WHERE ShopperID = '$this->ShopperID'
UNION ALL SELECT * FROM footlockerlisting WHERE ShopperID = '$this->ShopperID'");
if (mysql_num_rows($this->displaylistings) == 0) {
echo "<div id='nolistings'><a href='shop.php'>You have no active listings, <br />click here to get started.</a></div>";
$this->numrows = mysql_num_rows($this->displaylistings);
}
elseif (mysql_num_rows($this->displaylistings) == 1 ) {
$this->displaycount = 1;
$this->numrows = mysql_num_rows($this->displaylistings);
}
elseif (mysql_num_rows($this->displaylistings) == 2 || mysql_num_rows($this->displaylistings) > 2) {
$this->displaycount = 2;
$this->numrows = mysql_num_rows($this->displaylistings);
}
}
public function CartTotal() {
for ($i=0;$i<$this->numrows;$i++) {
$row = mysql_fetch_assoc($this->displaylistings);
echo $row['DiscountedPrice'];
}
}
public function DeleteListing() {
if ($_POST['deletelisting'] == 'yes') {
$deleteid = $_POST['deleteid'];
$deletestore = "$_POST[storename]";
$idstorehistory = str_replace("listing", "history", $deletestore);
$movetohistory = mysql_query("INSERT INTO $idstorehistory SELECT * FROM $identifystore WHERE id = $deleteid");
$userdelete = mysql_query("DELETE FROM $deletestore WHERE id = $deleteid");
}
}
public function DisplayListing() {
for($i=0;$i<$this->displaycount;$i++) {
$row=mysql_fetch_assoc($this->displaylistings);
// Check to what store this listing belongs to
$nordstromtest=mysql_query("SELECT * FROM nordstromlisting WHERE ShopperID = '$this->ShopperID'");
$nordstromstore=mysql_fetch_assoc($nordstromtest);
if ($row == $nordstromstore) {
$storename = "Nordstrom";
$storetbl = "nordstromlisting";
}
$saksfifthavenuetest=mysql_query("SELECT * FROM saksfifthavenuelisting WHERE ShopperID = '$this->ShopperID'");
$saksfifthavenuestore=mysql_fetch_assoc($saksfifthavenuetest);
if ($row == $saksfifthavenuestore) {
$storename = "Sak's Fifth Avenue";
$storetbl = "saksfifthavenuelisting";
}
$neimanmarcustest=mysql_query("SELECT * FROM neimanmarcuslisting WHERE ShopperID = '$this->ShopperID'");
$neimanmarcusstore=mysql_fetch_assoc($neimanmarcustest);
if ($row == $neimanmarcusstore) {
$storename = "Neiman Marcus";
$storetbl = "neimanmarcuslisting";
}
$guesstest=mysql_query("SELECT * FROM guesslisting WHERE ShopperID = '$this->ShopperID'");
$guessstore=mysql_fetch_assoc($guesstest);
if ($row == $guessstore) {
$storename = "GUESS";
$storetbl = "guesslisting";
}
$americaneagletest=mysql_query("SELECT * FROM americaneaglelisting WHERE ShopperID = '$this->ShopperID'");
$americaneaglestore=mysql_fetch_assoc($americaneagletest);
if ($row == $americaneaglestore) {
$storename = "American Eagle";
$storetbl = "americaneaglelisting";
}
$gnctest=mysql_query("SELECT * FROM gnclisting WHERE ShopperID = '$this->ShopperID'");
$gncstore=mysql_fetch_assoc($gnctest);
if ($row == $gncstore) {
$storename = "GNC";
$storetbl = "gnclisting";
}
$footlockertest=mysql_query("SELECT * FROM footlockerlisting WHERE ShopperID = '$this->ShopperID'");
$footlockerstore=mysql_fetch_assoc($footlockertest);
if ($row == $footlockerstore) {
$storename = "Foot Locker";
$storetbl = "footlockerlisting";
}
$bananarepublictest=mysql_query("SELECT * FROM bananarepubliclisting WHERE ShopperID = '$this->ShopperID'");
$bananarepublicstore=mysql_fetch_assoc($bananarepublictest);
if ($row == $bananarepublicstore) {
$storename = "Banana Republic";
$storetbl = "bananarepubliclisting";
}
$urbanoutfitterstest=mysql_query("SELECT * FROM urbanoutfitterslisting WHERE ShopperID = '$this->ShopperID'");
$urbanoutfittersstore=mysql_fetch_assoc($urbanoutfitterstest);
if ($row == $urbanoutfittersstore) {
$storename = "Urban Outfitters";
$storetbl = "urbanoutfitterslisting";
}
//Delete old listings (test with minutes...)
$timenow = date("Y-m-d");
$time = strtotime($timenow);
$storehistory = str_ireplace("listing","history","$storetbl");
$movetohistory = mysql_query("INSERT INTO $storehistory SELECT * FROM $storetbl WHERE $time - datecreated >= 432000") or die ("Query failed: " . mysql_error() . " Actual query: " . $query);
$deltefromlisting = mysql_query("DELETE FROM $storetbl WHERE $time - datecreated >= 432000") or die ("Query failed: " . mysql_error() . " Actual query: " . $query);
//Item link modifactions
if ($row['link'] != null) {
$shortlink = substr($row['link'],0,30);
$shortlink .= '...';
}
if ($row['itemsize'] != null ) {
$mensshirt = $row['itemsize'];
}
if ($row['waistsize'] != 0) {
$waistsize = $row['waistsize'];
$w = 'Waist';
}
if ($row['lengthsize'] != 0) {
$lengthsize = $row['lengthsize'];
$l = 'Length';
}
if ($row['ladystopsize'] != null) {
$ladystopsize = $row['ladystopsize'];
}
if ($row['ladysdresssize'] != 0) {
$ladysdresssize = $row['ladysdresssize'];
}
if ($row['ladysbottomsize'] != 0) {
$ladysbottomsize = $row['ladysbottomsize'];
}
if ($row['shoesize'] != 0) {
$shoesize = $row['ladysshoesize'];
}
echo "<b><div id='storenametab'><span class='storename'>$storename</span></div></b>";
echo "<div id='listings1'><span id='orderdetails'>Item Number : $row[itemnum] <br />";
echo "Discount Price: $$row[DiscountedPrice] <br />";
echo "Item Type : $row[itemtype]<br />";
echo "Item Size :
$mensshirt
$waistsize $w
$lengthsize $l
$ladystopsize
$ladysdresssize
$ladysbottomsize
$shoesize
<br />";
echo "Item Color: $row[itemcolor] <br />";
if ($row['link'] != null) {
echo "Item URL: <a href='$row[link]' target='_blank'>$shortlink</a><br />";
}
//STATUS
if ($row['VillainID'] == 0)
echo "Status: Unclaimed <br />";
else {
$VillainPaypalEmail = mysql_query("SELECT PaypalEmail FROM villains WHERE VillainID = '$row[VillainID]'");
$fetchVillain = mysql_fetch_assoc($VillainPaypalEmail);
$VillainPaypal = $fetchVillain['PaypalEmail'];
$itemname = "Item Number: $row[itemnum] -- $row[itemtype] -- $mensshirt $waistsize $w $lengthsize $l $ladystopsize $ladysdresssize $ladysbottomsize $shoesize -- $row[itemcolor]";
$discprice = $row['DiscountedPrice'];
$state = mysql_query("SELECT state from users WHERE Username = '$username'");
$fetchstate = mysql_fetch_assoc($state);
$state = $fetchstate['state'];
switch ($storetbl) {
case "nordstromlisting":
$shipping = 8;
if ($state == 'AZ' || 'CA' || 'CO' || 'CT' || 'FL' || 'GA' || 'HI' || 'IA' || 'ID' || 'IL' || 'IN' || 'KS' || 'MA' || 'MD' || 'MN' || 'MO' || 'NC' || 'NJ' || 'NV' || 'NY' || 'OH' || 'PA' || 'RI' || 'SD' || 'TX' || 'UT' || 'VA' || 'WA') {
$tax = $discprice * .09;
}
else {
$tax = $discprice * .02;
}
break;
case "saksfifthavenuelisting":
switch ($discprice) {
case ($discprice <= 25):
$shipping = 5;
break;
case ($discprice > 25 && $discprice <= 50):
$shipping = 8;
break;
case ($discprice > 50 && $discprice <= 100):
$shipping = 10;
break;
case ($discprice > 100 && $discprice <= 200):
$shipping = 13;
break;
case ($discprice > 200 && $discprice <= 300):
$shipping = 15;
break;
case ($discprice > 300 && $discprice <= 500):
$shippig = 17;
break;
case ($discprice > 500):
$shipping = 20;
break;
}
if ($state == 'AL' || 'AZ' || 'CA' || 'CO' || 'CT' || 'FL' || 'GA' || 'IL' || 'IN' || 'LA' || 'MA' || 'MD' || 'MN' || 'MO' || 'NC' || 'NJ' || 'NV' || 'NY' || 'OH' || 'OK' || 'PA' || 'SC' || 'TX' || 'VA' || 'DC') {
$tax = $discprice * .09;
}
else {
$tax = .02;
}
break;
case "neimanmarcuslisting":
switch ($discprice) {
case ($discprice <= 25):
$shipping = 6;
break;
case ($discprice > 25 && $discprice <= 50):
$shipping = 9;
break;
case ($discprice > 50 && $discprice <= 100):
$shipping = 11.50;
break;
case ($discprice > 100 && $discprice <= 200):
$shipping = 16.50;
break;
case ($discprice > 200 && $discprice <= 300):
$shipping = 18.50;
break;
case ($discprice > 300 && $discprice <= 500):
$shippig = 21.50;
break;
case ($discprice > 500 && $discprice <= 700):
$shipping = 25.50;
break;
case ($discprice > 700 && $discprice <= 1000):
$shipping = 29.00;
break;
case ($discprice > 1000):
$shipping = 32.00;
break;
}
if ($state == 'AZ' || 'CA' || 'CO' || 'FL' || 'GA' || 'HI' || 'IL' || 'MA' || 'MD' || 'MI' || 'MN' || 'MO' || 'NC' || 'NJ' || 'NV' || 'NY' || 'PA' || 'TX' || 'VA' || 'WA' || 'DC') {
$tax = $discprice * .09;
}
else {
$tax = $discprice * .02;
}
break;
case "urbanoutfitterslisting":
switch ($discprice) {
case ($discprice <= 50):
$shipping = 6;
break;
case ($discprice > 25 && $discprice < 50):
$shipping = 8;
break;
case ($discprice >= 50 && $discprice < 100):
$shipping = 10;
break;
case ($discprice >= 100 && $discprice < 150):
$shipping = 12;
break;
case ($discprice > 150):
$shipping = 0;
break;
}
if ($state == 'AL' || 'AZ' || 'CA' || 'CO' || 'CT' || 'FL' || 'GA' || 'IL' || 'IN' || 'KS' || 'LA' || 'MA' || 'MD' || 'MI' || 'MN' || 'MO' || 'NB' || 'NM' || 'NC' || 'OH' || 'OR' || 'NV' || 'NY' || 'PA' || 'RI' || 'SC' || 'TN' || 'TX' || 'UT' || 'VA' || 'VT' || 'WA' || 'WI' || 'DC') {
$tax = $discprice * .09;
}
else {
$tax = $discprice * .02;
}
break;
case "gnclisting":
$shipping = 6;
break;
case "bananarepubliclisting";
$shipping = 7;
//call Banana Republic for list of taxable states
break;
case "guesslisting":
$shipping = 7.95;
if ($state == 'AZ' || 'CA' || 'CO' || 'CT' || 'FL' || 'GA' || 'HI' || 'IL' || 'IN' || 'KS' || 'LA' || 'MA' || 'MD' || 'MI' || 'MN' || 'MO' || 'NJ' || 'NV' || 'NY' || 'NC' || 'OH' || 'PA' || 'RI' || 'SC' || 'TN' || 'TX' || 'VA' || 'WA') {
$tax = $discprice * .09;
}
else {
$tax = $discprice * .02;
}
break;
case "footlockerlisting";
$shipping = 6.99;
if ($state == 'AK' || 'DE'|| 'MT' || 'NH' || 'OR') {
$tax = $discprice * .02;
}
else {
$tax = $discprice * .09;
}
break;
case "americaneaglelisting":
switch($discprice) {
case ($discprice < 100):
$shipping = 7.00;
break;
case ($discprice > 100):
$shipping = 0;
break;
}
$tax = $discprice * .09;
break;
}
echo "Status: Claimed!"?>
<form action='https://www.paypal.com/cgi-bin/webscr' target='blank' method='post'>
<input type='hidden' name='business' value='<?php echo $VillainPaypal ?>'>
<input type='hidden' name='cmd' value='_xclick'>
<input type='hidden' name='item_name' value="<?php echo $itemname ?>">
<input type='hidden' name='shipping' value="<?php echo $shipping ?>">
<input type='hidden' name='tax' value="<?php echo $tax ?>">
<input type='hidden' name='amount' value='<?php echo $row['DiscountedPrice'] ?>'>
<input type='hidden' name='currency_code' value='USD'>
<input type='image' name='submit' border='0'
src='https://www.paypal.com/en_US/i/btn/btn_buynow_LG.gif'
alt='PayPal - The safer, easier way to pay online'>
<img alt='blahblah' border='0' width='1' height='1'
src='https://www.paypal.com/en_US/i/scr/pixel.gif' >
</form>
<br />
<?php ;
//STATUS
}
?><br /><form action="MyAccountNEW.php" method="POST">
<input type="hidden" name="deletelisting" id="deletelisting" value="yes">
<input type="hidden" name="deleteid" id="deleteid" value="<?php echo $row['id']; ?>">
<input type="hidden" name="storename" id="storename" value="<?php echo "$storetbl"; ?>">
<input type="submit" class="deletelistingbutton" value="Delete listing">
</form>
<?php
echo "</span></div>";
$mensshirt = "";
$waistsize = "";
$lengthsize = "";
$ladystopsize = "";
$ladysdresssize = "";
$ladysbottomsize = "";
$shoesize = "";
}
}
}
最佳答案
您正在从两个不同的函数消耗相同的资源。
如果您在查询句柄上使用 mysql_fetch_something 读取一行(在本例中为 $this->displaylistings)，您将无法再次读取它。
尝试将此行放在 DisplayListing 和 CartTotal 的开头
mysql_data_seek($this->displaylistings, 0)
它应该将 mysql 内部游标重新定位到与 $this->displaylistings 关联的结果集的第一行。让我知道它是否有效
关于php - 奇数类问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/1021611/