所以我创建了一个html表单，然后将结果发布到一个php文件，将其覆盖在PDF上，然后通过电子邮件将PDF发送给我自己以及放在表单中的电子邮件。我现在要做的就是找到一种简单的方法，使PDF包含一个序号。
例如：第一次填写表单时，数字0001将自动输入到PDF和0002第二次，依此类推。
是否有一个简单的PHP函数来实现这一目标？
基本上我正在创建一个在线发票表单，所以当我进行服务呼叫时，我可以从网络浏览器当场创建发票，然后通过电子邮件发送到我的办公室和客户端。
非常感谢任何帮助。
答案 0 :(得分：0)
对于递增的数字，您可以在数据库中保留一个数字，然后将其解压缩，添加1，使用它，然后将其放回数据库中以供下次使用，但这看起来很复杂。评论中有人提到使用时间戳，这样就可以这样做：
$invoicenumber = time(); //This number will always be unique
时间功能就像这样（从w3schools复制）：
time（）函数返回自Unix Epoch（1970年1月1日00:00:00 GMT）以来的秒数的当前时间。 由于实际秒数只能上升（增量），因此该数字将永远不会相同两次。
我希望这有用。
- 编辑
您还可以使用如下可读格式显示此日期/时间：
$time = time();
echo date("Y-m-d H:i:s",$time);
-Edit 2
如果你想要一个递增的数字，你基本上需要一个非常简单的数据库来保存它，这可能就像一个名为发票的表一样简单，有一个名为invoicenumber的列，它将你的发票号码存储在其中。您可以/可能应该使用它来存储其他发票信息，这样您就可以保存每个发票号码（这意味着我们只想获得最高的发票号码）
然后，每次要使用它时，您的代码都会如下所示：
首先，您有一个数据库信息文件（settings.php或类似的东西），其中包含您的数据库定义，可能如下所示：
define('DB_HOST', 'localhost');
define('DB_USER', 'db_username');
define('DB_PASS', 'db_password');
define('DB_NAME', 'database_name');
您的代码如下所示：
//Establish a mysql connection
$mysqli = new mysqli(DB_HOST, DB_USER, DB_PASS, DB_NAME);
//Set up a query to get the highest number
$query = "SELECT invoicenumber FROM invoices ORDER BY invoicenumber DESC LIMIT 1";
//Get the result
$result = $mysqli->query($query);
$row = $result->fetch_assoc();
//If we have a record
if($row){
//New invoice number
$invoicenumber = $row['invoicenumber']++;
//Else (database is empty, so start at the beginning)
}else{
$invoicenumber = 1;
}
//Now we have our invoice number, so do whatever you want with it
/**
* Code here to use the number
* */
//Now we wanna add the new invoice to the database, so
/**
* Add any other info to this statement if you want.
* If any of it is user submitted data, be sure to use prepared statements
* (just look at php.net's documentation on prepared statements)
* w3schools also has some nice tutorials on how to safely insert stuff
* in to a database, so check it all out :)
* */
$query = "INSERT INTO invoices(invoicenumber) VALUES($invoicenumber)";
//Execute the query
if($mysqli->query($query)){
//Show success
echo "Invoice $invoicenumber has been added to the database.";
}else{
//Show error
echo "Unfortunately we could not add invoice $invoicenumber to the database.";
}
//Now we can clear up our resources
$stmt->free_result(); $stmt->close(); $mysqli->close();
请注意：这是一个非常基本的例子。如果您使用的是用户提交的数据，则会增加和增强安全性，因此请在完成使用之前完成您的功课并确保完全理解此代码的每一行。
答案 1 :(得分：0)
我对患者报告中的患者登记号码做了同样的事情。
include('/home/user/php/class.pdf2text.php');
$p2t = new PDF2Text();
$p2t->setFilename($pdf);
$p2t->decodePDF();
$data = $p2t->output();
$len = strlen($data);
$pos = strpos($data,$accession);
if (pos){
$in .= "$accession,";
$checked++;
}
else{
$missingPDF += 1;echo "\n<p> <span class='bold red'>INCORRECT ACCESSION NUMBER c=$row[0] p=$row[1]</span>\n";
}
if ($checked > 0){
$in = substr($in,0,-1) . ')';
$sql = "UPDATE `Patient` SET `PDF`=1 WHERE $in";
}
<强> pdf2text.php
class PDF2Text {
// Some settings
var $multibyte = 4; // Use setUnicode(TRUE|FALSE)
var $convertquotes = ENT_QUOTES; // ENT_COMPAT (double-quotes), ENT_QUOTES (Both), ENT_NOQUOTES (None)
var $showprogress = true; // TRUE if you have problems with time-out
// Variables
var $filename = '';
var $decodedtext = '';
function setFilename($filename) {
// Reset
$this->decodedtext = '';
$this->filename = $filename;
}
function output($echo = false) {
if($echo) echo $this->decodedtext;
else return $this->decodedtext;
}
function setUnicode($input) {
// 4 for unicode. But 2 should work in most cases just fine
if($input == true) $this->multibyte = 4;
else $this->multibyte = 2;
}
function decodePDF() {
// Read the data from pdf file
$infile = @file_get_contents($this->filename, FILE_BINARY);
if (empty($infile))
return "";
// Get all text data.
$transformations = array();
$texts = array();
// Get the list of all objects.
preg_match_all("#obj[\n|\r](.*)endobj[\n|\r]#ismU", $infile . "endobj\r", $objects);
$objects = @$objects[1];
// Select objects with streams.
for ($i = 0; $i < count($objects); $i++) {
$currentObject = $objects[$i];
// Prevent time-out
@set_time_limit ();
if($this->showprogress) {
// echo ". ";
flush(); ob_flush();
}
// Check if an object includes data stream.
if (preg_match("#stream[\n|\r](.*)endstream[\n|\r]#ismU", $currentObject . "endstream\r", $stream )) {
$stream = ltrim($stream[1]);
// Check object parameters and look for text data.
$options = $this->getObjectOptions($currentObject);
if (!(empty($options["Length1"]) && empty($options["Type"]) && empty($options["Subtype"])) )
// if ( $options["Image"] && $options["Subtype"] )
// if (!(empty($options["Length1"]) && empty($options["Subtype"])) )
continue;
// Hack, length doesnt always seem to be correct
unset($options["Length"]);
// So, we have text data. Decode it.
$data = $this->getDecodedStream($stream, $options);
if (strlen($data)) {
if (preg_match_all("#BT[\n|\r](.*)ET[\n|\r]#ismU", $data . "ET\r", $textContainers)) {
$textContainers = @$textContainers[1];
$this->getDirtyTexts($texts, $textContainers);
} else
$this->getCharTransformations($transformations, $data);
}
}
}
// Analyze text blocks taking into account character transformations and return results.
$this->decodedtext = $this->getTextUsingTransformations($texts, $transformations);
}
function decodeAsciiHex($input) {
$output = "";
$isOdd = true;
$isComment = false;
for($i = 0, $codeHigh = -1; $i < strlen($input) && $input[$i] != '>'; $i++) {
$c = $input[$i];
if($isComment) {
if ($c == '\r' || $c == '\n')
$isComment = false;
continue;
}
switch($c) {
case '\0': case '\t': case '\r': case '\f': case '\n': case ' ': break;
case '%':
$isComment = true;
break;
default:
$code = hexdec($c);
if($code === 0 && $c != '0')
return "";
if($isOdd)
$codeHigh = $code;
else
$output .= chr($codeHigh * 16 + $code);
$isOdd = !$isOdd;
break;
}
}
if($input[$i] != '>')
return "";
if($isOdd)
$output .= chr($codeHigh * 16);
return $output;
}
function decodeAscii85($input) {
$output = "";
$isComment = false;
$ords = array();
for($i = 0, $state = 0; $i < strlen($input) && $input[$i] != '~'; $i++) {
$c = $input[$i];
if($isComment) {
if ($c == '\r' || $c == '\n')
$isComment = false;
continue;
}
if ($c == '\0' || $c == '\t' || $c == '\r' || $c == '\f' || $c == '\n' || $c == ' ')
continue;
if ($c == '%') {
$isComment = true;
continue;
}
if ($c == 'z' && $state === 0) {
$output .= str_repeat(chr(0), 4);
continue;
}
if ($c < '!' || $c > 'u')
return "";
$code = ord($input[$i]) & 0xff;
$ords[$state++] = $code - ord('!');
if ($state == 5) {
$state = 0;
for ($sum = 0, $j = 0; $j < 5; $j++)
$sum = $sum * 85 + $ords[$j];
for ($j = 3; $j >= 0; $j--)
$output .= chr($sum >> ($j * 8));
}
}
if ($state === 1)
return "";
elseif ($state > 1) {
for ($i = 0, $sum = 0; $i < $state; $i++)
$sum += ($ords[$i] + ($i == $state - 1)) * pow(85, 4 - $i);
for ($i = 0; $i < $state - 1; $i++) {
try {
if(false == ($o = chr($sum >> ((3 - $i) * 8)))) {
throw new Exception('Error');
}
$output .= $o;
} catch (Exception $e) { /*Dont do anything*/ }
}
}
return $output;
}
function decodeFlate($data) {
return @gzuncompress($data);
}
function getObjectOptions($object) {
$options = array();
if (preg_match("#<<(.*)>>#ismU", $object, $options)) {
$options = explode("/", $options[1]);
@array_shift($options);
$o = array();
for ($j = 0; $j < @count($options); $j++) {
$options[$j] = preg_replace("#\s+#", " ", trim($options[$j]));
if (strpos($options[$j], " ") !== false) {
$parts = explode(" ", $options[$j]);
$o[$parts[0]] = $parts[1];
} else
$o[$options[$j]] = true;
}
$options = $o;
unset($o);
}
return $options;
}
function getDecodedStream($stream, $options) {
$data = "";
if (empty($options["Filter"]))
$data = $stream;
else {
$length = !empty($options["Length"]) ? $options["Length"] : strlen($stream);
$_stream = substr($stream, 0, $length);
foreach ($options as $key => $value) {
if ($key == "ASCIIHexDecode")
$_stream = $this->decodeAsciiHex($_stream);
elseif ($key == "ASCII85Decode")
$_stream = $this->decodeAscii85($_stream);
elseif ($key == "FlateDecode")
$_stream = $this->decodeFlate($_stream);
elseif ($key == "Crypt") { // TO DO
}
}
$data = $_stream;
}
return $data;
}
function getDirtyTexts(&$texts, $textContainers) {
for ($j = 0; $j < count($textContainers); $j++) {
if (preg_match_all("#\[(.*)\]\s*TJ[\n|\r]#ismU", $textContainers[$j], $parts))
$texts = array_merge($texts, array(@implode('', $parts[1])));
elseif (preg_match_all("#T[d|w|m|f]\s*(\(.*\))\s*Tj[\n|\r]#ismU", $textContainers[$j], $parts))
$texts = array_merge($texts, array(@implode('', $parts[1])));
elseif (preg_match_all("#T[d|w|m|f]\s*(\[.*\])\s*Tj[\n|\r]#ismU", $textContainers[$j], $parts))
$texts = array_merge($texts, array(@implode('', $parts[1])));
}
}
function getCharTransformations(&$transformations, $stream) {
preg_match_all("#([0-9]+)\s+beginbfchar(.*)endbfchar#ismU", $stream, $chars, PREG_SET_ORDER);
preg_match_all("#([0-9]+)\s+beginbfrange(.*)endbfrange#ismU", $stream, $ranges, PREG_SET_ORDER);
for ($j = 0; $j < count($chars); $j++) {
$count = $chars[$j][1];
$current = explode("\n", trim($chars[$j][2]));
for ($k = 0; $k < $count && $k < count($current); $k++) {
if (preg_match("#<([0-9a-f]{2,4})>\s+<([0-9a-f]{4,512})>#is", trim($current[$k]), $map))
$transformations[str_pad($map[1], 4, "0")] = $map[2];
}
}
for ($j = 0; $j < count($ranges); $j++) {
$count = $ranges[$j][1];
$current = explode("\n", trim($ranges[$j][2]));
for ($k = 0; $k < $count && $k < count($current); $k++) {
if (preg_match("#<([0-9a-f]{4})>\s+<([0-9a-f]{4})>\s+<([0-9a-f]{4})>#is", trim($current[$k]), $map)) {
$from = hexdec($map[1]);
$to = hexdec($map[2]);
$_from = hexdec($map[3]);
for ($m = $from, $n = 0; $m <= $to; $m++, $n++)
$transformations[sprintf("%04X", $m)] = sprintf("%04X", $_from + $n);
} elseif (preg_match("#<([0-9a-f]{4})>\s+<([0-9a-f]{4})>\s+\[(.*)\]#ismU", trim($current[$k]), $map)) {
$from = hexdec($map[1]);
$to = hexdec($map[2]);
$parts = preg_split("#\s+#", trim($map[3]));
for ($m = $from, $n = 0; $m <= $to && $n < count($parts); $m++, $n++)
$transformations[sprintf("%04X", $m)] = sprintf("%04X", hexdec($parts[$n]));
}
}
}
}
function getTextUsingTransformations($texts, $transformations) {
$document = "";
for ($i = 0; $i < count($texts); $i++) {
$isHex = false;
$isPlain = false;
$hex = "";
$plain = "";
for ($j = 0; $j < strlen($texts[$i]); $j++) {
$c = $texts[$i][$j];
switch($c) {
case "<":
$hex = "";
$isHex = true;
$isPlain = false;
break;
case ">":
$hexs = str_split($hex, $this->multibyte); // 2 or 4 (UTF8 or ISO)
for ($k = 0; $k < count($hexs); $k++) {
$chex = str_pad($hexs[$k], 4, "0"); // Add tailing zero
if (isset($transformations[$chex]))
$chex = $transformations[$chex];
$document .= html_entity_decode("&#x".$chex.";");
}
$isHex = false;
break;
case "(":
$plain = "";
$isPlain = true;
$isHex = false;
break;
case ")":
$document .= $plain;
$isPlain = false;
break;
case "\\":
$c2 = $texts[$i][$j + 1];
if (in_array($c2, array("\\", "(", ")"))) $plain .= $c2;
elseif ($c2 == "n") $plain .= '\n';
elseif ($c2 == "r") $plain .= '\r';
elseif ($c2 == "t") $plain .= '\t';
elseif ($c2 == "b") $plain .= '\b';
elseif ($c2 == "f") $plain .= '\f';
elseif ($c2 >= '0' && $c2 <= '9') {
$oct = preg_replace("#[^0-9]#", "", substr($texts[$i], $j + 1, 3));
$j += strlen($oct) - 1;
$plain .= html_entity_decode("&#".octdec($oct).";", $this->convertquotes);
}
$j++;
break;
default:
if ($isHex)
$hex .= $c;
elseif ($isPlain)
$plain .= $c;
break;
}
}
$document .= "\n";
}
return $document;
}
}