Computer Hope
Software => Computer programming => Topic started by: 12Strings on November 15, 2014, 11:50:34 PM
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Hi, I'm baffled here; the two following statements from my JS
file displays the correct values but the code to enter them
into a table enters zeroes. I tried document.write(s) and the
correct values were displayed.what am I missing? Thanks in advance.
var expression = value1 + op +value2 +'='+ total;
alert(expression);
------------------------------------
<?php
include('calcbegin.html');
$servername = "localhost";
$username = "root";table
$password = "cookie";
$dbname = "homedb";
show
// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error)
{ die("Connection failed: " . $conn->connect_error); }
$sql = "INSERT INTO calculator (purpose, value1, op, value2, total)
VALUES ('$purpose', '$value1', '$op', '$value2', '$total')";
if ($conn->query($sql) === TRUE)
{ echo "New record created successfully"; }
else
{ echo "Error: " . $sql . "<br>" . $conn->error; }
$conn->close();
?>
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Looks like your getting 0's because no values are being passed to VALUES ('$purpose', '$value1', '$op', '$value2', '$total') and so because nothing is passed to them they are 0 and so $total = 0.
From looking at your shared code it establishes a connection to your database, and just passes whatever value the variables are without any data being passed into those variables ( which is usually 0, however because not initialized to 0 it could be different than 0 with bogus info ) to the database as seen here:
$sql = "INSERT INTO calculator (purpose, value1, op, value2, total)
VALUES ('$purpose', '$value1', '$op', '$value2', '$total')";
Do you have more code to this to show other than what is shown that shows where the variables are being assigned values? I feel that is where your problem is with this in the variable value assignments.
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Below is my code in it"s entirety. thanks for any help.
<?php
include('calcbegin.html');
?>
<html><head>
<script type="text/javascript">
function make_blank()
{ document.form.type.value =""; }
</script>
</head><body><center>
<!-- use ajax - OnCalc function to send data to your database. ???-->
<FORM name="Keypad" action="" method="post">
<input type="text" name="purpose" size="48" value="what's this for?" onFocus="this.value=''">
<TABLE border=2 width=50 height=60 cellpadding=1 cellspacing=5>
<tr> <TD colspan=3 align=middle>
<input name="ReadOut" type="Text" size=24 value="0" width=100%></TD>
<TD></TD>
<TD>
<input name="btnClear" type="Button" value=" C " onclick="Clear()"></TD>
<TD>
<input name="btnClearEntry" type="Button" value=" CE " onclick="ClearEntry()"></TD>
</TR><TR>
<TD>
<input name="btnSeven" type="Button" value=" 7 " onclick="NumPressed(7)"></TD>
<TD>
<input name="btnEight" type="Button" value=" 8 " onclick="NumPressed(8)"></TD>
<TD>
<input name="btnNine" type="Button" value=" 9 " onclick="NumPressed(9)"></TD>
<TD></TD>
<TD>
<input name="btnNeg" type="Button" value=" +/- " onclick="Neg()"></TD>
<TD>
<input name="btnPercent" type="Button" value=" % " onclick="Percent()"></TD>
</TR><TR>
<TD>
<input name="btnFour" type="Button" value=" 4 " onclick="NumPressed(4)"></TD>
<TD>
<input name="btnFive" type="Button" value=" 5 " onclick="NumPressed(5)"></TD>
<TD>
<input name="btnSix" type="Button" value=" 6 " onclick="NumPressed(6)"></TD>
<TD></TD>
<TD align=middle>
<input name="btnPlus" type="Button" value=" + " onclick="Operation('+')"></TD>
<TD align=middle>
<input name="btnMinus" type="Button" value=" - " onclick="Operation('-')"></TD>
</TR><TR>
<TD>
<input name="btnOne" type="Button" value=" 1 " onclick="NumPressed(1)"></TD>
<TD>
<input name="btnTwo" type="Button" value=" 2 " onclick="NumPressed(2)"></TD>
<TD>
<input name="btnThree" type="Button" value=" 3 " onclick="NumPressed(3)"></TD>
<TD></TD>
<TD align=middle>
<input name="btnMultiply" type="Button" value=" x " onclick="Operation('*')"></TD>
<TD align=middle>
<input name="btnDivide" type="Button" value=" / " onclick="Operation('/')"></TD>
</TR><TR>
<TD>
<input name="btnZero" type="Button" value=" 0 " onclick="NumPressed(0)"></TD>
<TD>
<input name="btnDecimal" type="Button" value=" . " onclick="Decimal()"></TD>
<TD colspan=3>
</TD><TD>
<input name="btnEquals" type="Button" value=" = " onclick="Operation('=')"></TD>
</TR></TABLE>
<INPUT type="image" src="programmer.gif" alt="submit button"><p>
</FORM>
<font face="Verdana, Arial, Helvetica" size=2>
<SCRIPT LANGUAGE="JavaScript">
var FKeyPad = document.Keypad;
var Accumulate = 0;
var FlagNewNum = false;
var PendingOp = "";
function NumPressed (Num)
{
if (FlagNewNum)
{ FKeyPad.ReadOut.value = Num;
FlagNewNum = false;
}
else
{
if (FKeyPad.ReadOut.value == "0")
FKeyPad.ReadOut.value = Num;
else
FKeyPad.ReadOut.value += Num;
}
}
function Operation (Op)
{
var Readout = FKeyPad.ReadOut.value;
if (FlagNewNum && PendingOp != "=");
else
{
FlagNewNum = true;
if ( '+' == PendingOp )
{
var temp = Accumulate;
Accumulate += parseFloat(Readout);
OnCalc(temp,PendingOp,Readout,Accumulate);
}
else if ( '-' == PendingOp )
{
var temp = Accumulate;
Accumulate -= parseFloat(Readout);
OnCalc(temp,PendingOp,Readout,Accumulate);
}
else if ( '/' == PendingOp )
{
var temp = Accumulate;
Accumulate /= parseFloat(Readout);
OnCalc(temp,PendingOp,Readout,Accumulate);
}
else if ( '*' == PendingOp )
{
var temp = Accumulate;
Accumulate *= parseFloat(Readout);
OnCalc(temp,PendingOp,Readout,Accumulate);
}
else
{
Accumulate = parseFloat(Readout);
}
FKeyPad.ReadOut.value = Accumulate;
PendingOp = Op;
}
}
function Decimal ()
{
var curReadOut = FKeyPad.ReadOut.value;
if (FlagNewNum)
{
curReadOut = "0.";
FlagNewNum = false;
}
else
{
if
(curReadOut.indexOf(".") == -1)
curReadOut += ".";
}
FKeyPad.ReadOut.value = curReadOut;
}
function ClearEntry ()
{
FKeyPad.ReadOut.value = "0";
FlagNewNum = true;
}
function Clear ()
{
Accumulate = 0;
PendingOp = "";
ClearEntry();
}
function Neg ()
{
FKeyPad.ReadOut.value = parseFloat(FKeyPad.ReadOut.value) * -1;
}
function Percent ()
{
FKeyPad.ReadOut.value = (parseFloat(FKeyPad.ReadOut.value) / 100) * parseFloat(Accumulate);
}
function OnCalc(value1,op,value2,total)
{
var expression = value1 + op +value2 +'='+ total;
alert(expression);
}
</SCRIPT>
<?php
include ('gethomedb.php');
// now connected to database
if(!empty($_POST["submit"]))
{
$id = $_POST['id'];
$value1=$_POST['value1'];
$op=$_POST['op'];
$value2=$_POST['value2'];
$total=$_POST['total'];
$name = $_POST['total'];
if(isset($_POST['total']))
{
$fetch="SELECT purpose, value1, op, value2, total FROM calculator WHERE total = '".$name."'";
$result = mysqli_query($con,$fetch);
if(!$result)
{echo "Error:".(mysqli_error($con));}
// ===========================================================
$query = "
INSERT INTO calculator (purpose, value1, op, value2, total)
VALUES ('$purpose','$value1','$op','$value2','$total')";
mysqli_query($con, $query);
mysqli_close($con);
}
}
?><a href="http://localhost/home/calcprint.php">PRINT</a>
</body></html>