Source Code for Address Envelopes in PDF for Printing

<?php

// PHP Source Code for Address Envelopes in PDF for Printing

// This page displays an envelope form for the user to enter

// a sender and recipient name. When the form is posted, a PDF

// letter is generated with the sender/recipient aligned properly

// on a #10 envelope. If a valid zip code is found in the

// recipient address then a POSTNET bar code is also displayed in the PDF.

// By Shailesh N. Humbad, https://www.somacon.com/p456.php

// License: Creative Commons Attribution 3.0 United States License

define('FPDF_FONTPATH','/home/username/font/');

require('/home/username/fpdf.php');

class PDF_POSTNET extends FPDF

{

// PUBLIC PROCEDURES

// draws a bar code for the given zip code using pdf lines

// triggers error if zip code is invalid

// x,y specifies the lower left corner of the bar code

function POSTNETBarCode($x, $y, $zipcode)

{

// Save nomical bar dimensions in user units

// Full Bar Nominal Height = 0.125"

$FullBarHeight = 9 / $this->k;

// Half Bar Nominal Height = 0.050"

$HalfBarHeight = 3.6 / $this->k;

// Full and Half Bar Nominal Width = 0.020"

$BarWidth = 1.44 / $this->k;

// Bar Spacing = 0.050"

$BarSpacing = 3.6 / $this->k;

$FiveBarSpacing = $BarSpacing * 5;

// 1 represents full-height bars and 0 represents half-height bars

$BarDefinitionsArray = Array(

1 => Array(0,0,0,1,1),

2 => Array(0,0,1,0,1),

3 => Array(0,0,1,1,0),

4 => Array(0,1,0,0,1),

5 => Array(0,1,0,1,0),

6 => Array(0,1,1,0,0),

7 => Array(1,0,0,0,1),

8 => Array(1,0,0,1,0),

9 => Array(1,0,1,0,0),

0 => Array(1,1,0,0,0));

// validate the zip code

$this->_ValidateZipCode($zipcode);

// set the line width

$this->SetLineWidth($BarWidth);

// draw start frame bar

$this->Line($x, $y, $x, $y - $FullBarHeight);

$x += $BarSpacing;

// draw digit bars

for($i = 0; $i < 5; $i++)

{

$this->_DrawDigitBars($x, $y, $BarSpacing, $HalfBarHeight,

$FullBarHeight, $BarDefinitionsArray, $zipcode{$i});

$x += $FiveBarSpacing;

}

// draw more digit bars if 10 digit zip code

if(strlen($zipcode) == 10)

{

for($i = 6; $i < 10; $i++)

{

$this->_DrawDigitBars($x, $y, $BarSpacing, $HalfBarHeight,

$FullBarHeight, $BarDefinitionsArray, $zipcode{$i});

$x += $FiveBarSpacing;

}

}

// draw check sum digit

$this->_DrawDigitBars($x, $y, $BarSpacing, $HalfBarHeight,

$FullBarHeight, $BarDefinitionsArray,

$this->_CalculateCheckSumDigit($zipcode));

$x += $FiveBarSpacing;

// draw end frame bar

$this->Line($x, $y, $x, $y - $FullBarHeight);

}

// Reads from end of string and returns first matching valid

// zip code of form DDDDD or DDDDD-DDDD, in that order.

// Returns empty string if no zip code found.

function ParseZipCode($stringToParse)

{

// check if string is an array or object

if(is_array($stringToParse) || is_object($stringToParse))

{

return "";

}

// convert parameter to a string

$stringToParse = strval($stringToParse);

$lengthOfString = strlen($stringToParse);

if ( $lengthOfString < 5 ) {

return "";

}

// parse the zip code backward

$zipcodeLength = 0;

$zipcode = "";

for ($i = $lengthOfString-1; $i >= 0; $i--)

{

// conditions to continue the zip code

switch($zipcodeLength)

{

case 0:

case 1:

case 2:

case 3:

if ( is_numeric($stringToParse{$i}) ) {

$zipcodeLength += 1;

$zipcode .= $stringToParse{$i};

} else {

$zipcodeLength = 0;

$zipcode = "";

}

break;

case 4:

if ( $stringToParse{$i} == "-" ) {

$zipcodeLength += 1;

$zipcode .= $stringToParse{$i};

} elseif ( is_numeric($stringToParse{$i}) ) {

$zipcodeLength += 1;

$zipcode .= $stringToParse{$i};

break 2;

} else {

$zipcodeLength = 0;

$zipcode = "";

}

break;

case 5:

case 6:

case 7:

case 8:

if ( is_numeric($stringToParse{$i}) ) {

$zipcodeLength = $zipcodeLength + 1;

$zipcode = $zipcode . $stringToParse{$i};

} else {

$zipcodeLength = 0;

$zipcode = "";

}

break;

case 9:

if ( is_numeric($stringToParse{$i}) ) {

$zipcodeLength = $zipcodeLength + 1;

$zipcode = $zipcode . $stringToParse{$i};

break;

} else {

$zipcodeLength = 0;

$zipcode = "";

}

break;

}

}

// return the parsed zip code if found

if ( $zipcodeLength == 5 || $zipcodeLength == 10 ) {

// reverse the zip code

return strrev($zipcode);

} else {

return "";

}

}

// PRIVATE PROCEDURES

// triggers user error if the zip code is invalid

// valid zip codes are of the form DDDDD or DDDDD-DDDD

// where D is a digit from 0 to 9, returns the validated zip code

function _ValidateZipCode($zipcode)

{

$functionname = "ValidateZipCode Error: ";

// check if zipcode is an array or object

if(is_array($zipcode) || is_object($zipcode))

{

trigger_error($functionname.

"Zip code may not be an array or object.", E_USER_ERROR);

}

// convert zip code to a string

$zipcode = strval($zipcode);

// check if length is 5

if ( strlen($zipcode) != 5 && strlen($zipcode) != 10 ) {

trigger_error($functionname.

"Zip code must be 5 digits or 10 digits including hyphen. len:".

strlen($zipcode)." zipcode: ".$zipcode, E_USER_ERROR);

}

if ( strlen($zipcode) == 5 ) {

// check that all characters are numeric

for ( $i = 0; $i < 5; $i++ ) {

if ( is_numeric( $zipcode{$i} ) == false ) {

trigger_error($functionname.

"5 digit zip code contains non-numeric character.",

E_USER_ERROR);

}

}

} else {

// check for hyphen

if ( $zipcode{5} != "-" ) {

trigger_error($functionname.

"10 digit zip code does not contain hyphen in right place.",

E_USER_ERROR);

}

// check that all characters are numeric

for ( $i = 0; $i < 10; $i++ ) {

if ( is_numeric($zipcode{$i}) == false && $i != 5 ) {

trigger_error($functionname.

"10 digit zip code contains non-numeric character.",

E_USER_ERROR);

}

}

}

// return the string

return $zipcode;

}

// takes a validated zip code and

// calculates the checksum for POSTNET

function _CalculateCheckSumDigit($zipcode)

{

// calculate sum of digits

if( strlen($zipcode) == 10 ) {

$sumOfDigits = $zipcode{0} + $zipcode{1} +

$zipcode{2} + $zipcode{3} + $zipcode{4} +

$zipcode{6} + $zipcode{7} + $zipcode{8} +

$zipcode{9};

} else {

$sumOfDigits = $zipcode{0} + $zipcode{1} +

$zipcode{2} + $zipcode{3} + $zipcode{4};

}

// return checksum digit

if( ($sumOfDigits % 10) == 0 )

return 0;

else

return 10 - ($sumOfDigits % 10);

}

// Takes a digit and draws the corresponding POSTNET bars.

function _DrawDigitBars($x, $y, $BarSpacing, $HalfBarHeight,

$FullBarHeight, $BarDefinitionsArray, $digit)

{

// check for invalid digit

if($digit < 0 && $digit > 9)

trigger_error("DrawDigitBars: invalid digit.", E_USER_ERROR);

// Draw the five bars representing a digit.

for($i = 0; $i < 5; $i++)

{

if($BarDefinitionsArray[$digit][$i] == 1)

$this->Line($x, $y, $x, $y - $FullBarHeight);

else

$this->Line($x, $y, $x, $y - $HalfBarHeight);

$x += $BarSpacing;

}

}

}

// Get request variables into global variables

$selectRequestVariables = array("command","returnline1","returnline2",

"returnline3","returnline4","recipientline1","recipientline2",

"recipientline3","recipientline4");

foreach($selectRequestVariables as $selectRequestVar) {

// split across lines for readability

eval('$GLOBALS["'.$selectRequestVar.'"] = $'.

$selectRequestVar.' = isset($_REQUEST["'.

$selectRequestVar.'"]) ? $_REQUEST["'.

$selectRequestVar.'"] : "";');

}

// If the command is 'createenvelope', generate the envelope

if($command == "createenvelope")

{

// Set up the PDF object

$pdf = new PDF_POSTNET("P","pt",array(684,315));

$pdf->Open();

$pdf->AddPage();

$pdf->SetFont('Times','',11);

// Print return address

$pdf->Text(54,54,$returnline1);

$pdf->Text(54,68,$returnline2);

$pdf->Text(54,82,$returnline3);

$pdf->Text(54,96,$returnline4);

// Get last non-empty line of recipient address

if($recipientline4 != "") {

$stringToParse = $recipientline4;

}

elseif($recipientline3 != "") {

$stringToParse = $recipientline3;

}

else {

$stringToParse = $recipientline2;

}

// Extract zip code from last non-empty line of recipient

$zipcode = $pdf->ParseZipCode($stringToParse);

// If zip code is found, print the POSTNET bar code

if($zipcode != "") {

$pdf->POSTNETBarCode(288,170,$zipcode);

}

// Print recipient address

$pdf->Text(288,184,$recipientline1);

$pdf->Text(288,198,$recipientline2);

$pdf->Text(288,212,$recipientline3);

$pdf->Text(288,226,$recipientline4);

// Output the PDF

header("Content-type: application/pdf");

$pdf->Output();

exit();

}

require('/home/username/headerfooterfunctions.php');

print_header();

?>

<style type="text/css">

table.letter {

border: 1px outset black;

width: 800px;

height: 350px;

padding: 0px;

margin: 0px;

}

td.address {

padding-left: 30px;

margin: 0px;

height: 14pt;

}

td.address1 {

padding-left: 280px;

margin: 0px;

height: 14pt;

}

input.address {

padding: 0px;

height: 14pt;

width: 212pt;

border: 1px inset #999999;

font-family: "Times",serif;

font-size: 11pt;

}

td.topmargin {

padding: 0px;

margin: 0px;

height: 30px;

}

td.separator {

padding: 0px;

margin: 0px;

height: 30px;

}

</style>

<script type="text/javascript">

function clearform()

{

for(var i = 0; i < 8; i++)

document.forms['letterform'].elements[i].value = "";

}

function initpage() {

document.forms['letterform'].elements[0].focus();

}

</script>

</head>

<body onload="initpage();">

<?php print_body(); ?>

<?php print_h1(); ?>

<p class="description">Generate a Number 10 Envelope in PDF with

automatic POSTNET bar coding.</p>

<form method="post" action="p456.php" name="letterform">

<table class="letter">

<tr>

<td class="topmargin"></td>

</tr>

<tr>

<td class="address">

<input class="address" type="text" name="returnline1" value="Joe Citizen">

</td>

</tr>

<tr>

<td class="address">

<input class="address" type="text" name="returnline2" value="12345 Main St.">

</td>

</tr>

<tr>

<td class="address">

<input class="address" type="text" name="returnline3" value="Sometown, Anywhere 55555">

</td>

</tr>

<tr>

<td class="address">

<input class="address" type="text" name="returnline4">

</td>

</tr>

<tr>

<td class="separator"></td>

</tr>

<tr>

<td class="address1">

<input class="address" type="text" name="recipientline1" value="The President">

</td>

</tr>

<tr>

<td class="address1">

<input class="address" type="text" name="recipientline2" value="The White House">

</td>

</tr>

<tr>

<td class="address1">

<input class="address" type="text" name="recipientline3" value="1600 Pennsylvania Avenue">

</td>

</tr>

<tr>

<td class="address1">

<input class="address" type="text" name="recipientline4" value="Washington, DC 20500">

</td>

</tr>

<tr>

<td class="filler"></td>

</tr>

</table>

<input type="submit" value="Generate Envelope" name="submitbutton">

<input type="button" value="Clear" onClick="clearform();">

<input type="reset" value="Reset">

<input type="hidden" name="command" value="createenvelope">

</form>

<p>Press the "Generate Envelope" button to dynamically generate the envelope in PDF.<br>The envelope will show a POSTNET bar code if a valid 5 or 9 digit zip code is found.

<br>This page uses the <a href="http://www.fpdf.org/">Freeware PDF library, FPDF</a>. You can also get the PHP source code to generate <a href="http://www.fpdf.org/en/script/script27.php">POSTNET bar codes</a>.

<?php

print_footer();

?>