My project seems simple, update a couple of database tables, one from a little form, print a receipt
and echo out the receipt# and other values. The updates work but the values echoed are wrong or
absent. Cmon brave souls, tell me what I'm doin rong.
<!DOCTYPE html><html> <head> <title>record payment</title> <html><head> <script type="text/javascript"> var monthNames = [ "January","February","March","April","May","June","July", "August","September","October","November","December" ]; var today = new Date(); var date = monthNames[today.getMonth()] + " - " + today.getDate() + " - " + today.getFullYear(); </script> </head> <body><center> Date:<script type="text/javascript">document.write(date);</script><p> <img src="apt-pic.jpg" alt="apartment" height=100 width=300><p> <?php $link = mysqli_connect("localhost", "root", "", "homedb"); // Check connection if($link === false){ die("ERROR: Could not connect. " . mysqli_connect_error()); } $unit=$_POST['unit']; $amtpaid=$_POST['amtpaid']; $paidday=$_POST['paidday']; $id = ''; $amtpaid = 0; $amtdue = 0; $dueday = ''; $prevbal = 0; $latechg = 0; $secdep = 0; $damage = 0; $courtcost = 0; $nsf = 0; $paidday = ''; $bizname = ''; $bizstreet = ''; $bizcity = ''; $bizzip = ''; $bizemail = ''; $receiptno = 0; $owed = $amtdue - $amtpaid; $due= ''; /* Perform a query, check for error */ $sql = "UPDATE crttbl SET receiptno = receiptno + 1 where id=1"; echo "receipt# $receiptno"; // line 50 if(mysqli_query($link, $sql)){ echo "receiptno updated"; } else { echo "ERROR: Could not able to execute $sql. " . mysqli_error($link); } $due = $amtdue + $prevbal + $latechg + $secdep + $damage + $courtcost + $nsf; /* if no pay or part pay, add $35 to latechg field and amount not paid to prevbal field */ if ($amtpaid < $due) { $prevbal = $due - $amtpaid; $latechg = $latechg + 35.00; $amtpaid = 0; $secdep = 0; $damage = 0; $courtcost = 0; $nsf = 0; $hudpay = 0; $comments = ' '; $paidday = ' '; } /* if amt paid = amt due, */ if ($amtpaid == $due) { $amtpaid = 0; $prevbal = 0; $latechg = 0;; $secdep = 0; $damage = 0; $courtcost = 0; $nsf = 0; $hudpay = 0; $comments = ' '; $paidday = ' '; } /* if over-payment subtract over-payment from prevbal */ if ($amtpaid > $due) { $prevbal = $amtpaid - $due; $amtpaid = 0; $latechg = 0; $secdep = 0; $damage = 0; $courtcost = 0; $nsf = 0; $hudpay = 0; $comments = ' '; $paidday = ' '; } /* Perform a query, check for error */ $sql = "UPDATE paytbl SET $amtpaid = '$amtpaid', dueday = DATE_ADD(dueday, INTERVAL 1 MONTH), prevbal = '$prevbal', latechg = '$latechg', paidday = '$paidday' WHERE unit = '$unit'"; if(mysqli_query($link, $sql)){ echo ""; } else { echo "ERROR: Could not able to execute $sql. " . mysqli_error($link); } ?> <?php echo $bizname;echo "<br />"; ?> // line 78 <?php echo $bizstreet;echo "<br />"; ?> <?php echo $bizcity;echo "<br />"; ?> <?php echo $bizzip;echo "<br />"; ?><br> <?php echo $bizemail;echo "<br />"; ?> // line 82 For:<SELECT name="options"> <option value="#990033" style="background-color: Violet;">Rent payment</option> <option value="#003300" style="background-color: Aquamarine;">Background Check</option> <option value="#6600cc" style="background-color: Pink;">Security Deposit Payment</option> <option value="#003300" style="background-color: Aquamarine;">Damages Payment</option> <option value="#990033" style="background-color: Violet;">Late Charges Payment</option> <option value="#003300" style="background-color: Aquamarine;">Court Costs Payment</option> <option value="#6600cc" style="background-color: Pink;">NSF Payment</option> <option value="#990033" style="background-color: Violet;"> </option> </SELECT><p> Tenant paying is: <?php echo $_POST["unit"]; ?> - Amount paid is: <?php echo $_POST["amtpaid"]; ?> - Balance due is:<?php echo $owed; ?><br> // line 98 <b><input type="text" size="35" maxlength="35" name=frm.Name" value="sign" STYLE="color: #000000; font-weight: bold; background-color: #ffccff;" onFocus="this.value=''"><br> <h3>We Thank You</h3> </center></body></html> <?php // Close connection mysqli_close($link); ?>apartment
receipt# 0receiptno updatedERROR: Could not able to execute UPDATE paytbl SET 0 = '0',
dueday = DATE_ADD(dueday, INTERVAL 1 MONTH), prevbal = '0', latechg = '0', paidday = ' '
WHERE unit = 'unit1'. You have an error in your SQL syntax; check the manual that corresponds
to your MariaDB server version for the right syntax to use near '0 = '0', dueday = DATE_ADD(dueday,
INTERVAL 1 MONTH), prevbal = '0', latech...' at line 2
// line 78
// line 82 For: Tenant paying is: unit1 - Amount paid is: 530.00 - Balance due is:0
// line 98
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