PHP - Variable = Variable + Number - Script Not Working

Hello everyone,

I can get Test 2 to successfully operate the if statement using a variable variable.

But when I try the same method using a session variable (Test 1) the if statement is not executed. Please could you tell me why the if statement in Test 1 is not being executed?

Code: [Select]

<?php
# TEST 1
$_SESSION[test_variable] = "abcd";
$session_variable_name = "_SESSION[test_variable]";
if ($$session_variable_name == "abcd")
{
echo "<br>line 373, abcd<br>";
}

# TEST 2
$test_variable = "efgh";
$test_variable_name = "test_variable";
if ($$test_variable_name == "efgh")
{
echo "<br>line 379, efgh<br>";
}

?>
Many thanks,

Stu

Hi, I'm just starting PHP and I ran into a simple problem (that I can fix), but I just want to understand why my first approach doesn't work.

I was testing multiplications and additions and the result I got was unexpected.

Here is the code that doesn't work:
Code: [Select]
<?php
$number1 = 5;
$number2 = 10;

print $number1." multiplied by ".$number2." + 1000 = ".$number1*$number2+1000;
?>

Obviously, what I want as a result when I'm displaying the page is: "5 multiplied by 10 + 1000 = 1050"

What I get: "1005". That's right, nothing else. On top of getting an erroneous answer, the sentence that's supposed to display right before the equation doesn't display at all.

It's even worse if I switch it around like that:

Code: [Select]
print $number1." multiplied by ".$number2." + 1000 = ".1000+$number1*$number2;

I get an error message and nothing displays.

The obvious solution works: using a parenthesis at the beginning and at the end of the equation, which I should do regardless, but still, it's bugging me and since I just started learning PHP today, I want to understand how the code is compiled / interpreted so I don't make stupid mistakes like this one.

Thanks in advance for the replies.

Hi Guyz,

I need to check the variable $itemDescription to see if the client has entered a '1' before the item description(example: 1 table)

Reason, is the client would like to add sales tax to all NOn-Food related items of 6.25%

This is for a local auction house. It needs to be simple. i,e. Don't wanna add any more form fields. Just let the user type the number 1 before all items that need to be taxed.

Here's my code:
Code: [Select]
<?php
ob_start();
?>
<link rel="stylesheet" href="style.css" type="text/css">
<style type="text/css">

</style>
</head>

<?PHP session_start();
ob_start();
# Config settings below
# Change these to whatever you want :)
#############################

$cellsPerRow = '6';

#############################
include('connect.php');

// These queries get the amount of bidders that are in the database
$getAllBidders = mysql_query("SELECT `id` FROM bidders");
$totalBidders  = mysql_num_rows($getAllBidders);


// This section is to check if the Add New Item form has been submitted
  if($_POST['addNewItem']) {
    // Retrieve Query Strings from URL
    $itemDescription = $_POST['itemDescription'];
    $itemPrice       = $_POST['itemPrice'];
    $winningBidder   = $_POST['winningBidder'];
    $totalDeals      = $_POST['totalDeals'];
    $totalPrice      = ($totalDeals*$itemPrice);

    // Check the submitted data and make sure all is correct
    if(!$itemDescription) {
      $message = 'You must enter an Item Description.';
    } else if(!$itemPrice) {
      $message = 'You must enter an Item Price.';
    } else if(!$winningBidder) {
      $message = 'You must enter a Winning Bidder ID.';
    } else if(!$totalDeals) {
      $message = 'You must enter the amount of Deals.';
    } else if(!is_numeric($winningBidder)) {
      $message = 'The Winning Bidder ID can only be numbers.';
    } else {

      // Check to see if the bidder ID already exists
      $checkBidder = mysql_query("SELECT * FROM bidders WHERE biddersId='$winningBidder' LIMIT 1");
      $checkBidder = mysql_fetch_assoc($checkBidder);

      // If the Bidder ID does not exist, we re-direct to allow us to save the Bidder ID
      if(!$checkBidder) {

        header("Location: ?action=confirmListing&iDesc=".$itemDescription."&iPrice=".$itemPrice."&wBidder=".$winningBidder."&tDeals=".$totalDeals."");

      } else {

        // If Bidder ID exists we just insert the transaction accordingly
        mysql_query("INSERT INTO transactions (`itemDescription`, `itemPrice`, `bidderId`, `itemQty`, `totalPrice`) VALUES ('$itemDescription', '$itemPrice', '$winningBidder', '$totalDeals', '$totalPrice');");
        $message1 = 'The transaction has been successfully added.';

mysql_query("SELECT owed From bidders WHERE biddersId='$winningBidder'") or die(mysql_error());
if ($row['owed']==0) {
mysql_query("UPDATE bidders SET owed='1' WHERE biddersId='$winningBidder'") or die(mysql_error()); 
}
      }

    }

  }

// This section is to check if the Add Bidder to database form has been submitted
  if($_POST['confirmBidder']) {
    $itemDescription = $_POST['itemDescription'];
    $itemPrice       = $_POST['itemPrice'];
    $winningBidder   = $_POST['winningBidder'];
    $totalDeals      = $_POST['totalDeals'];
    $totalPrice      = ($itemPrice*$totalDeals);
    $addBidder       = $_POST['addBidder'];
$checkInput= preg_match([1]+*);


if ($itemDescription== $checkInput)
$itemPrice= $itemPrice * 6.25%;

    mysql_query("INSERT INTO transactions (`itemDescription`, `itemPrice`, `bidderId`, `itemQty`, `totalPrice`) VALUES ('$itemDescription', '$itemPrice', '$winningBidder', '$totalDeals', '$totalPrice');");
    $message1 = 'The transaction has been successfully added.';

   
    if($addBidder == 'Yes') {
      mysql_query("INSERT INTO bidders (biddersId) VALUES ('$winningBidder');");
      $message1 .= '<br> The Bidder ID has also been added.';
mysql_query("SELECT owed From bidders WHERE biddersId='$winningBidder'") or die(mysql_error());
if ($row['owed']==0) {
mysql_query("UPDATE bidders SET owed='1' WHERE biddersId='$winningBidder'") or die(mysql_error()); 
}
    }
     
 if($addBidder == 'No') {
                 $message1 = '<br><font color= "red"> Bidder has NOT been logged.</font>';
               }

   // $itemDescription = '';
   // $itemPrice       = '';
   // $winningBidder   = '';
   //  $totalDeals      = '';
   // $totalPrice      = '';
   // $addBidder       = '';
      }

       

   

 

?>


<?PHP
  // This line of code will check the current task we are doing
  if($_GET['action'] == 'confirmListing') {
    $itemDescription = $_GET['iDesc'];
    $itemPrice       = $_GET['iPrice'];
    $winningBidder   = $_GET['wBidder'];
    $totalDeals      = $_GET['tDeals'];
?>

<form name="confirmBidder" method="POST" action="?">

<?PHP
// This is the hidden data from the previous form
// Better than using sessions and GET query
?>
<input type="hidden" name="itemDescription" id="itemDescription" value="<?PHP echo $itemDescription;?>">
<input type="hidden" name="itemPrice" id="itemPrice" value="<?PHP echo $itemPrice;?>">
<input type="hidden" name="winningBidder" id="winningBidder" value="<?PHP echo $winningBidder;?>">
<input type="hidden" name="totalDeals" id="totalDeals" value="1">

<table cellpadding="0" cellspacing="1" border="0" style="background: #ffffff; margin: auto;">
 <tr>
  <td colspan="2" class="formHeader"> Add New Auction Item </td>
 </tr>
 <tr>
  <td class="formField"> Add This Bidder? </td>
  <td class="formValue"> <select name="addBidder" id="addBidder" class="input" style="width: 195px;"> <option value="Yes">Yes</option> <option value="No">No</option></select> </td>
 </tr>
 <tr>
  <td colspan="2" class="formButton">
<input type="submit" name="confirmBidder" id="confirmBidder" value="Confirm Bidder Action?">
<input type="reset" name="reset" id="reset" value="Reset Form">
  </td>
 </tr>
</table>
</form>

<?PHP
  // If the action is not to confirm a listing then show add item section
  } else {
?>

<?PHP//----- Add New Item Section -----\\?>

<?PHP
  if($message) {
    echo '<div class="Error">',$message,'</div><div style="height: 10px;"></div>';
  } else if($message1) {
    echo '<div class="Success">',$message1,'</div><div style="height: 10px;"></div>';
  }
?>

<form name="addNewItem" method="POST" action="?">
<table cellpadding="0" cellspacing="1" border="0" style="background: #ffffff; margin: auto;">
 <tr>
  <td colspan="2" class="formHeader"> Add New Auction Item </td>
 </tr>
 <tr>
  <td class="formField"> Item Description </td>
  <td class="formValue"> <input type="text" name="itemDescription" class="formText" id="itemDescription" value="<?=$itemDescription;?>" style="width: 195px;"> </td>
 </tr>
<tr>
 <td class="formField"> Item Price </td>
  <td class="formValue"> <input type="text" name="itemPrice" class="formText" id="itemPrice" value="<?=$itemPrice;?>" style="width: 195px;"> </td>
 </tr>
 <tr>
  <td class="formField"> Winning Bidder ID </td>
  <td class="formValue"> <input type="text" name="winningBidder" class="formText" id="winningBidder" style="width: 195px;"> </td>
 </tr>
 <tr>
  <td class="formField"> How Many Deals? </td>
  <td class="formValue"> <input type="text" name="totalDeals" class="formText" id="totalDeals" value="1" style="width: 195px;"> </td>
 </tr>
 <tr>
  <td colspan="2" class="formButton">
<input type="submit" name="addNewItem" id="addNewItem" value="Add New Auction Item?">
<input type="reset" name="reset" id="reset" value="Reset Form">
  </td>
 </tr>
</table>
</form>

<?PHP//----- Add New Item Section -----\\?>

<?PHP } ?>


All help appreciated to the fullest...
 

I have the following code in my index.php:

                   <?php
                    $files = array();
                    $files = glob('download/*.iso');
                    $file = $files[count($files) - 1];
                    $strlen ( string $file ) : int  /* length of $file */
                    $filelen = $strlen -9  /* length of unwanted characters - "download/" */
                    $filename =          /* how do I get the filename starting at the 10th position  */
                   ?>

                     <div class="container">
                        <div class="divL">                       
                            <h3>Get the latest version of FoxClone iso</h3>
                          <a href="<?php echo "/{$file}";?>"><img src="images/button_get-the-app.png" alt="" width="200" height="60"></a>

I'd like to replace "Get the latest version of FoxClone iso" in the next to last line with "Get Foxclone "<?php echo "/{$filename}";?>". How do I extract just the file name from $file? I know that I have to:

1. get the length of $file
2. subtract the number of unwanted character to determine the start character (In this case, start at 10th character)
3. and extract everything from the 10th character to length of $file.

Step 3 is where I just don't know how to accomplish the task. I'd appreciate some help on this.

Thanks in advance,
Larry

how can you increase the page number in the following line until $status returns an empty result?

curl_setopt($ch, CURLOPT_HTTPHEADER, array("Accept: application/xml", "Authorization: xxxxxxxxxxxxx:xxxxxxxxxxxxxxxx", "Page: 2"));