Hi all,
I hope someone can help - it is likely a very easy task.
I have managed to tweak it somewhat already to better suit my needs.
The main thing I want to do though is - When it asks for "Annual Contribution" I want this to be "Monthly"
So I would assume the code needs to be changed to take the, would be newly named "Monthly" value and just multiply it by 12 before the rest of the code is run.
Ive tweaked and looked at the code, but can not seem to work out how the maths is done. Its probably a very easy task for someone who knows what they are doing haha.
I hope somebody can help or point me in the general direction. It appears to be a very old basic plugin but seems to be the best one I could find that worked.
It is a compound interest calculator.
Thanks,
Sean
I hope someone can help - it is likely a very easy task.
I have managed to tweak it somewhat already to better suit my needs.
The main thing I want to do though is - When it asks for "Annual Contribution" I want this to be "Monthly"
So I would assume the code needs to be changed to take the, would be newly named "Monthly" value and just multiply it by 12 before the rest of the code is run.
Ive tweaked and looked at the code, but can not seem to work out how the maths is done. Its probably a very easy task for someone who knows what they are doing haha.
PHP:
<?php
/*
Plugin Name: Investment Calculator
Plugin URI: http://sharkinvestor.com/investment-calculator-wordpress-plugin/
Description: This is an investment compounding calculator giving detailed breakdown of how youir investment grows over time. It lets you choose to reinvest only part or all of the profits (i.e. partial compounding)
Author: Sean
Version: 2.0.1
Author URI: http://pimteam.net/
*/
/* Copyright 2008 Bobby Handzhiev (email : [email protected])
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
function investmentcalculator_add_page()
{
add_submenu_page('plugins.php', 'Investment Calculator Configuration', 'Investment Calculator Configuration', 8, __FILE__, 'investmentcalculator_options');
}
// investcalc_options() displays the page content for the FirstTimer Options submenu
function investmentcalculator_options()
{
// Read in existing option value from database
$ccalc_table = stripslashes( get_option( 'ccalc_table' ) );
$ccalc_titlecell = stripslashes( get_option( 'ccalc_titlecell' ) );
// See if the user has posted us some information
// If they did, this hidden field will be set to 'Y'
if( $_POST[ 'ccalc_update' ] == 'Y' )
{
// Read their posted value
$ccalc_table = $_POST[ 'ccalc_table' ];
$ccalc_titlecell = $_POST[ 'ccalc_titlecell' ];
// Save the posted value in the database
update_option( 'ccalc_table', $ccalc_table );
update_option( 'ccalc_titlecell', $ccalc_titlecell );
// Put an options updated message on the screen
?>
<div class="updated"><p><strong><?php _e('Options saved.', 'investcalc_domain' ); ?></strong></p></div>
<?php
}
// Now display the options editing screen
echo '<div class="wrap">';
// header
echo "<h2>" . __( 'Investment Calculator Options', 'ccalc_domain' ) . "</h2>";
// options form
?>
<form name="form1" method="post" action="<?php echo str_replace( '%7E', '~', $_SERVER['REQUEST_URI']); ?>">
<input type="hidden" name="ccalc_update" value="Y">
<p><?php _e("CSS class definition for the calculator table:", 'investcalc_domain' ); ?>
<textarea name="ccalc_table" rows='5' cols='70'><?php echo stripslashes ($ccalc_table); ?></textarea>
</p><hr />
<p><?php _e("CSS class definition for the results title cells:", 'investcalc_domain' ); ?>
<textarea name="ccalc_titlecell" rows='5' cols='70'><?php echo stripslashes ($ccalc_titlecell); ?></textarea>
</p><hr />
<p class="submit">
<input type="submit" name="Submit" value="<?php _e('Update Options', 'ccalc_domain' ) ?>" />
</p>
</form>
</div>
<?php
}
// This just echoes the text
function investmentcalculator($content)
{
if(!strstr($content,"[compounding-calculator]")) return $content;
//construct the calculator page
$compcalc="<style type=\"text/css\">
.ccalc_table
{
".get_option('ccalc_table')."
}
th.ccalc_titlecell
{
".get_option('ccalc_titlecell')."
}
</style>\n\n";
$compcalc.='<h3 align="center">Investment Compounding Calculator</h3>
<form method="post">
<table align="center" border="0" cellspacing="1" cellpadding="5" class="ccalc_table">
<tr>
<td align="center">
Invested amount : </td>
<td align="left"><input name="invested_amount" type="text" id="invested_amount" size="9" value="'.$_POST['invested_amount'].'" /> <span class="hint">Your initial investment</span></td>
</tr>
<tr>
<td align="center">
Annual Contribution: </td>
<td align="left"><input name="contribution" type="text" id="contribution" size="9" value="'.$_POST['contribution'].'" /> <span class="hint">Optional</span></td>
</tr>
<tr>
<td align="center">Interest rate:</td>
<td align="left"><input name="ROI" type="text" id="ROI" size="5" value="'.$_POST['ROI'].'" /> <span class="hint">% Return on investment (Interest)</span></td>
</tr>
<tr>
<td align="center">Number of years:</td>
<td align="left"><select name="period" >
<option value="Select">-- Select --</option>';
for( $i=1 ; $i<=100 ; $i++):
if($i==$_POST['period']) $selected='selected';
else $selected='';
$compcalc.="<option $selected value=\"$i\">$i</option>";
endfor;
$compcalc.='</select></td>
</tr>
<tr>
<td align="center">Compounding percentage: </td>
<td align="left"><select name="cp">
<option value="Percentage">--CP--</option>';
for( $i=0 ; $i<101 ; $i++)
{
if($i==$_POST['cp'] or (!isset($_POST['cp']) and $i==100)) $selected='selected';
else $selected='';
$compcalc.="<option $selected value=\"$i\">$i</option>";
}
$compcalc.='</select> <span>% reinvested profits</span></td>
</tr><tr>
<td align="left"> </td>
<td align="left"><input name="Submit" type="submit" value="Submit" /></td>
</tr>
</table>
<input type="hidden" name="ok" value="1" />
</form>';
if(!empty($_POST['ok']))
{
$compcalc.="<p> </p><table class='ccalc_table ccalc_result'>
<tr><th>Year</th><th>Balance</th><th>Added</th><th>Interest</th>
<th>Return</th></tr><tbody>";
$current_year=date("Y");
$total_contribution=0;
// balance before adding anything
$balance=$_POST['invested_amount'];
$new_balance=$balance;
$total_interest=0;
$total_cash=0;
for($i=0;$i<$_POST['period'];$i++)
{
$year=$current_year+$i;
// add contribution
$total_contribution+=$_POST['contribution'];
// interest in $ for the period
$interest=$new_balance*($_POST['ROI']/100);
$total_interest+=$interest;
// what cash is withdrawn
// interest - reinvested interest
$cash=round($interest-($interest*($_POST['cp']/100)));
$total_cash+=$cash;
// now new balance
$new_balance=$new_balance+$interest-$cash+$_POST['contribution'];;
// total return at this point
$roi=round((($new_balance+$total_cash)/($balance+$total_contribution))*100);
$compcalc.="<tr><td>$year</td><td>\$".number_format($new_balance)."</td><td>\$".number_format($_POST['contribution'])."</td>
<td>\$".number_format($interest)."</td><td>".number_format($roi)."%</td></tr>";
}
$compcalc.="</tbody><tr><th>Total:</td><th>\$".number_format($new_balance)."</th><th>\$".number_format($total_contribution)."</th>
<th>\$".number_format($total_interest)."</th>
<th>".number_format($roi)."%</th></tr>";
$compcalc.='</table>';
}
$content=str_replace("[compounding-calculator]",$compcalc,$content);
return $content;
}
add_action('admin_menu','investmentcalculator_add_page');
add_filter('the_content', 'investmentcalculator');I hope somebody can help or point me in the general direction. It appears to be a very old basic plugin but seems to be the best one I could find that worked.
It is a compound interest calculator.
Thanks,
Sean