Google的 Chrome实验室 收 集了很多让人难以置信的基于 HTML5 Canvas 和 JavaScript 的实验项目,里面的例子都很独特,让人惊叹。我从未想过结合 HTML…
May 19, 2015
在web页面上快速生成二维码的两种实用方法 (javascript/php)
二维码是桌面和移动端快速分享的高效手段之一,这里介绍两个不错的快速开发二维码的方法,和大家分享一下~~
方法1:使用新浪提供的服务
这种方式简单快速,在服务端生成一个二维码的图片,兼容性比较好,你无需自己处理任何相关二维码的生成,只需要提供一端文字或者url即可,方法如下:
<img src="http://qrcoder.sinaapp.com?t=http://www.gbtags.com">
生成效果如下:
大家扫一扫就可以访问极客标签主站了~~
方法2: 使用jQuery插件qrcode
QRcode是一个jQuery插件,可以使用javascript快速帮助你生成相关的二维码
相关代码如下:
var qrcode = new QRCode("qrcode", { text: "http://www.gbtags.com", width: 260, height: 260, colorDark: '#efb73e', colorLight: "#ffffff" });
生成效果如下:
如果对这个插件有兴趣,推荐阅读这节课程: QRcode的使用
以上是两种比较实用的生成二维码的方法, 懒人推荐使用第一种, 简单快速, 如果需要深度自定义的话,推荐自己使用JS来实现相关的二维码,具体看大家需求, 极客标签的代码分享使用的是第一种,大家可以参考一下,如下:
原文:http://www.gbtags.com/gb/share/5293.htm
方法3: PHP
qrcode类:
<?php //--------------------------------------------------------------- // QRCode for PHP5 // // Copyright (c) 2009 Kazuhiko Arase // // URL: http://www.d-project.com/ // // Licensed under the MIT license: // http://www.opensource.org/licenses/mit-license.php // // The word "QR Code" is registered trademark of // DENSO WAVE INCORPORATED // http://www.denso-wave.com/qrcode/faqpatent-e.html // //--------------------------------------------------------------------- //--------------------------------------------------------------- // QRCode //--------------------------------------------------------------- define("QR_PAD0", 0xEC); define("QR_PAD1", 0x11); class QRCode { var $typeNumber; var $modules; var $moduleCount; var $errorCorrectLevel; var $qrDataList; function QRCode() { $this->typeNumber = 1; $this->errorCorrectLevel = QR_ERROR_CORRECT_LEVEL_H; $this->qrDataList = array(); } function getTypeNumber() { return $this->typeNumber; } function setTypeNumber($typeNumber) { $this->typeNumber = $typeNumber; } function getErrorCorrectLevel() { return $this->errorCorrectLevel; } function setErrorCorrectLevel($errorCorrectLevel) { $this->errorCorrectLevel = $errorCorrectLevel; } function addData($data, $mode = 0) { if ($mode == 0) { $mode = QRUtil::getMode($data); } switch($mode) { case QR_MODE_NUMBER : $this->addDataImpl(new QRNumber($data) ); break; case QR_MODE_ALPHA_NUM : $this->addDataImpl(new QRAlphaNum($data) ); break; case QR_MODE_8BIT_BYTE : $this->addDataImpl(new QR8BitByte($data) ); break; case QR_MODE_KANJI : $this->addDataImpl(new QRKanji($data) ); break; default : trigger_error("mode:$mode", E_USER_ERROR); } } function clearData() { $qrDataList = array(); } function addDataImpl(&$qrData) { $this->qrDataList[] = $qrData; } function getDataCount() { return count($this->qrDataList); } function getData($index) { return $this->qrDataList[$index]; } function isDark($row, $col) { if ($this->modules[$row][$col] !== null) { return $this->modules[$row][$col]; } else { return false; } } function getModuleCount() { return $this->moduleCount; } function make() { $this->makeImpl(false, $this->getBestMaskPattern() ); } function getBestMaskPattern() { $minLostPoint = 0; $pattern = 0; for ($i = 0; $i < 8; $i++) { $this->makeImpl(true, $i); $lostPoint = QRUtil::getLostPoint($this); if ($i == 0 || $minLostPoint > $lostPoint) { $minLostPoint = $lostPoint; $pattern = $i; } } return $pattern; } function createNullArray($length) { $nullArray = array(); for ($i = 0; $i < $length; $i++) { $nullArray[] = null; } return $nullArray; } function makeImpl($test, $maskPattern) { $this->moduleCount = $this->typeNumber * 4 + 17; $this->modules = array(); for ($i = 0; $i < $this->moduleCount; $i++) { $this->modules[] = QRCode::createNullArray($this->moduleCount); } $this->setupPositionProbePattern(0, 0); $this->setupPositionProbePattern($this->moduleCount - 7, 0); $this->setupPositionProbePattern(0, $this->moduleCount - 7); $this->setupPositionAdjustPattern(); $this->setupTimingPattern(); $this->setupTypeInfo($test, $maskPattern); if ($this->typeNumber >= 7) { $this->setupTypeNumber($test); } $dataArray = $this->qrDataList; $data = QRCode::createData($this->typeNumber, $this->errorCorrectLevel, $dataArray); $this->mapData($data, $maskPattern); } function mapData(&$data, $maskPattern) { $inc = -1; $row = $this->moduleCount - 1; $bitIndex = 7; $byteIndex = 0; for ($col = $this->moduleCount - 1; $col > 0; $col -= 2) { if ($col == 6) $col--; while (true) { for ($c = 0; $c < 2; $c++) { if ($this->modules[$row][$col - $c] === null) { $dark = false; if ($byteIndex < count($data) ) { $dark = ( ( ($data[$byteIndex] >> $bitIndex) & 1) == 1); } $mask = QRUtil::getMask($maskPattern, $row, $col - $c); if ($mask) { $dark = !$dark; } $this->modules[$row][$col - $c] = $dark; $bitIndex--; if ($bitIndex == -1) { $byteIndex++; $bitIndex = 7; } } } $row += $inc; if ($row < 0 || $this->moduleCount <= $row) { $row -= $inc; $inc = -$inc; break; } } } } function setupPositionAdjustPattern() { $pos = QRUtil::getPatternPosition($this->typeNumber); for ($i = 0; $i < count($pos); $i++) { for ($j = 0; $j < count($pos); $j++) { $row = $pos[$i]; $col = $pos[$j]; if ($this->modules[$row][$col] !== null) { continue; } for ($r = -2; $r <= 2; $r++) { for ($c = -2; $c <= 2; $c++) { if ($r == -2 || $r == 2 || $c == -2 || $c == 2 || ($r == 0 && $c == 0) ) { $this->modules[$row + $r][$col + $c] = true; } else { $this->modules[$row + $r][$col + $c] = false; } } } } } } function setupPositionProbePattern($row, $col) { for ($r = -1; $r <= 7; $r++) { for ($c = -1; $c <= 7; $c++) { if ($row + $r <= -1 || $this->moduleCount <= $row + $r || $col + $c <= -1 || $this->moduleCount <= $col + $c) { continue; } if ( (0 <= $r && $r <= 6 && ($c == 0 || $c == 6) ) || (0 <= $c && $c <= 6 && ($r == 0 || $r == 6) ) || (2 <= $r && $r <= 4 && 2 <= $c && $c <= 4) ) { $this->modules[$row + $r][$col + $c] = true; } else { $this->modules[$row + $r][$col + $c] = false; } } } } function setupTimingPattern() { for ($r = 8; $r < $this->moduleCount - 8; $r++) { if ($this->modules[$r][6] !== null) { continue; } $this->modules[$r][6] = ($r % 2 == 0); } for ($c = 8; $c < $this->moduleCount - 8; $c++) { if ($this->modules[6][$c] !== null) { continue; } $this->modules[6][$c] = ($c % 2 == 0); } } function setupTypeNumber($test) { $bits = QRUtil::getBCHTypeNumber($this->typeNumber); for ($i = 0; $i < 18; $i++) { $mod = (!$test && ( ($bits >> $i) & 1) == 1); $this->modules[floor($i / 3)][$i % 3 + $this->moduleCount - 8 - 3] = $mod; } for ($i = 0; $i < 18; $i++) { $mod = (!$test && ( ($bits >> $i) & 1) == 1); $this->modules[$i % 3 + $this->moduleCount - 8 - 3][floor($i / 3)] = $mod; } } function setupTypeInfo($test, $maskPattern) { $data = ($this->errorCorrectLevel << 3) | $maskPattern; $bits = QRUtil::getBCHTypeInfo($data); for ($i = 0; $i < 15; $i++) { $mod = (!$test && ( ($bits >> $i) & 1) == 1); if ($i < 6) { $this->modules[$i][8] = $mod; } else if ($i < 8) { $this->modules[$i + 1][8] = $mod; } else { $this->modules[$this->moduleCount - 15 + $i][8] = $mod; } } for ($i = 0; $i < 15; $i++) { $mod = (!$test && ( ($bits >> $i) & 1) == 1); if ($i < 8) { $this->modules[8][$this->moduleCount - $i - 1] = $mod; } else if ($i < 9) { $this->modules[8][15 - $i - 1 + 1] = $mod; } else { $this->modules[8][15 - $i - 1] = $mod; } } $this->modules[$this->moduleCount - 8][8] = !$test; } function createData($typeNumber, $errorCorrectLevel, $dataArray) { $rsBlocks = QRRSBlock::getRSBlocks($typeNumber, $errorCorrectLevel); $buffer = new QRBitBuffer(); for ($i = 0; $i < count($dataArray); $i++) { $data = $dataArray[$i]; $buffer->put($data->getMode(), 4); $buffer->put($data->getLength(), $data->getLengthInBits($typeNumber) ); $data->write($buffer); } $totalDataCount = 0; for ($i = 0; $i < count($rsBlocks); $i++) { $totalDataCount += $rsBlocks[$i]->getDataCount(); } if ($buffer->getLengthInBits() > $totalDataCount * 8) { trigger_error("code length overflow. (" . $buffer->getLengthInBits() . ">" . $totalDataCount * 8 . ")", E_USER_ERROR); } // end code. if ($buffer->getLengthInBits() + 4 <= $totalDataCount * 8) { $buffer->put(0, 4); } // padding while ($buffer->getLengthInBits() % 8 != 0) { $buffer->putBit(false); } // padding while (true) { if ($buffer->getLengthInBits() >= $totalDataCount * 8) { break; } $buffer->put(QR_PAD0, 8); if ($buffer->getLengthInBits() >= $totalDataCount * 8) { break; } $buffer->put(QR_PAD1, 8); } return QRCode::createBytes($buffer, $rsBlocks); } function createBytes(&$buffer, &$rsBlocks) { $offset = 0; $maxDcCount = 0; $maxEcCount = 0; $dcdata = QRCode::createNullArray(count($rsBlocks) ); $ecdata = QRCode::createNullArray(count($rsBlocks) ); for ($r = 0; $r < count($rsBlocks); $r++) { $dcCount = $rsBlocks[$r]->getDataCount(); $ecCount = $rsBlocks[$r]->getTotalCount() - $dcCount; $maxDcCount = max($maxDcCount, $dcCount); $maxEcCount = max($maxEcCount, $ecCount); $dcdata[$r] = QRCode::createNullArray($dcCount); for ($i = 0; $i < count($dcdata[$r]); $i++) { $bdata = $buffer->getBuffer(); $dcdata[$r][$i] = 0xff & $bdata[$i + $offset]; } $offset += $dcCount; $rsPoly = QRUtil::getErrorCorrectPolynomial($ecCount); $rawPoly = new QRPolynomial($dcdata[$r], $rsPoly->getLength() - 1); $modPoly = $rawPoly->mod($rsPoly); $ecdata[$r] = QRCode::createNullArray($rsPoly->getLength() - 1); for ($i = 0; $i < count($ecdata[$r]); $i++) { $modIndex = $i + $modPoly->getLength() - count($ecdata[$r]); $ecdata[$r][$i] = ($modIndex >= 0)? $modPoly->get($modIndex) : 0; } } $totalCodeCount = 0; for ($i = 0; $i < count($rsBlocks); $i++) { $totalCodeCount += $rsBlocks[$i]->getTotalCount(); } $data = QRCode::createNullArray($totalCodeCount); $index = 0; for ($i = 0; $i < $maxDcCount; $i++) { for ($r = 0; $r < count($rsBlocks); $r++) { if ($i < count($dcdata[$r]) ) { $data[$index++] = $dcdata[$r][$i]; } } } for ($i = 0; $i < $maxEcCount; $i++) { for ($r = 0; $r < count($rsBlocks); $r++) { if ($i < count($ecdata[$r]) ) { $data[$index++] = $ecdata[$r][$i]; } } } return $data; } static function getMinimumQRCode($data, $errorCorrectLevel) { $mode = QRUtil::getMode($data); $qr = new QRCode(); $qr->setErrorCorrectLevel($errorCorrectLevel); $qr->addData($data, $mode); $qrData = $qr->getData(0); $length = $qrData->getLength(); for ($typeNumber = 1; $typeNumber <= 10; $typeNumber++) { if ($length <= QRUtil::getMaxLength($typeNumber, $mode, $errorCorrectLevel) ) { $qr->setTypeNumber($typeNumber); break; } } $qr->make(); return $qr; } function createImage($size = 2, $margin = 2) { $image_size = $this->getModuleCount() * $size + $margin * 2; $image = imagecreatetruecolor($image_size, $image_size); $black = imagecolorallocate($image, 0, 0, 0); $white = imagecolorallocate($image, 255, 255, 255); imagefilledrectangle($image, 0, 0, $image_size, $image_size, $white); for ($r = 0; $r < $this->getModuleCount(); $r++) { for ($c = 0; $c < $this->getModuleCount(); $c++) { if ($this->isDark($r, $c) ) { imagefilledrectangle($image, $margin + $c * $size, $margin + $r * $size, $margin + ($c + 1) * $size - 1, $margin + ($r + 1) * $size - 1, $black); } } } return $image; } function output($size = "2px") { $style = "border-style:none;border-collapse:collapse;margin:0px;padding:0px;"; $output = "<table style='$style'>"; for ($r = 0; $r < $this->getModuleCount(); $r++) { $output .= "<tr style='$style'>"; for ($c = 0; $c < $this->getModuleCount(); $c++) { $color = $this->isDark($r, $c)? "#000000" : "#ffffff"; $output .= "<td style='$style;width:$size;height:$size;background-color:$color'></td>"; } $output .= "</tr>"; } $output .= "</table>"; return $output; } function printHTML($size = "2px") { $style = "border-style:none;border-collapse:collapse;margin:0px;padding:0px;"; print("<table style='$style'>"); for ($r = 0; $r < $this->getModuleCount(); $r++) { print("<tr style='$style'>"); for ($c = 0; $c < $this->getModuleCount(); $c++) { $color = $this->isDark($r, $c)? "#000000" : "#ffffff"; print("<td style='$style;width:$size;height:$size;background-color:$color'></td>"); } print("</tr>"); } print("</table>"); } } //--------------------------------------------------------------- // QRUtil //--------------------------------------------------------------- $QR_PATTERN_POSITION_TABLE = array( array(), array(6, 18), array(6, 22), array(6, 26), array(6, 30), array(6, 34), array(6, 22, 38), array(6, 24, 42), array(6, 26, 46), array(6, 28, 50), array(6, 30, 54), array(6, 32, 58), array(6, 34, 62), array(6, 26, 46, 66), array(6, 26, 48, 70), array(6, 26, 50, 74), array(6, 30, 54, 78), array(6, 30, 56, 82), array(6, 30, 58, 86), array(6, 34, 62, 90), array(6, 28, 50, 72, 94), array(6, 26, 50, 74, 98), array(6, 30, 54, 78, 102), array(6, 28, 54, 80, 106), array(6, 32, 58, 84, 110), array(6, 30, 58, 86, 114), array(6, 34, 62, 90, 118), array(6, 26, 50, 74, 98, 122), array(6, 30, 54, 78, 102, 126), array(6, 26, 52, 78, 104, 130), array(6, 30, 56, 82, 108, 134), array(6, 34, 60, 86, 112, 138), array(6, 30, 58, 86, 114, 142), array(6, 34, 62, 90, 118, 146), array(6, 30, 54, 78, 102, 126, 150), array(6, 24, 50, 76, 102, 128, 154), array(6, 28, 54, 80, 106, 132, 158), array(6, 32, 58, 84, 110, 136, 162), array(6, 26, 54, 82, 110, 138, 166), array(6, 30, 58, 86, 114, 142, 170) ); $QR_MAX_LENGTH = array( array( array(41, 25, 17, 10), array(34, 20, 14, 8), array(27, 16, 11, 7), array(17, 10, 7, 4) ), array( array(77, 47, 32, 20), array(63, 38, 26, 16), array(48, 29, 20, 12), array(34, 20, 14, 8) ), array( array(127, 77, 53, 32), array(101, 61, 42, 26), array(77, 47, 32, 20), array(58, 35, 24, 15) ), array( array(187, 114, 78, 48), array(149, 90, 62, 38), array(111, 67, 46, 28), array(82, 50, 34, 21) ), array( array(255, 154, 106, 65), array(202, 122, 84, 52), array(144, 87, 60, 37), array(106, 64, 44, 27) ), array( array(322, 195, 134, 82), array(255, 154, 106, 65), array(178, 108, 74, 45), array(139, 84, 58, 36) ), array( array(370, 224, 154, 95), array(293, 178, 122, 75), array(207, 125, 86, 53), array(154, 93, 64, 39) ), array( array(461, 279, 192, 118), array(365, 221, 152, 93), array(259, 157, 108, 66), array(202, 122, 84, 52) ), array( array(552, 335, 230, 141), array(432, 262, 180, 111), array(312, 189, 130, 80), array(235, 143, 98, 60) ), array( array(652, 395, 271, 167), array(513, 311, 213, 131), array(364, 221, 151, 93), array(288, 174, 119, 74) ) ); define("QR_G15", (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0) ); define("QR_G18", (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0) ); define("QR_G15_MASK", (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1) ); class QRUtil { static function getPatternPosition($typeNumber) { global $QR_PATTERN_POSITION_TABLE; return $QR_PATTERN_POSITION_TABLE[$typeNumber - 1]; } static function getMaxLength($typeNumber, $mode, $errorCorrectLevel) { global $QR_MAX_LENGTH; $t = $typeNumber - 1; $e = 0; $m = 0; switch($errorCorrectLevel) { case QR_ERROR_CORRECT_LEVEL_L : $e = 0; break; case QR_ERROR_CORRECT_LEVEL_M : $e = 1; break; case QR_ERROR_CORRECT_LEVEL_Q : $e = 2; break; case QR_ERROR_CORRECT_LEVEL_H : $e = 3; break; default : trigger_error("e:$errorCorrectLevel", E_USER_ERROR); } switch($mode) { case QR_MODE_NUMBER : $m = 0; break; case QR_MODE_ALPHA_NUM : $m = 1; break; case QR_MODE_8BIT_BYTE : $m = 2; break; case QR_MODE_KANJI : $m = 3; break; default : trigger_error("m:$mode", E_USER_ERROR); } return $QR_MAX_LENGTH[$t][$e][$m]; } static function getErrorCorrectPolynomial($errorCorrectLength) { $a = new QRPolynomial(array(1) ); for ($i = 0; $i < $errorCorrectLength; $i++) { $a = $a->multiply(new QRPolynomial(array(1, QRMath::gexp($i) ) ) ); } return $a; } static function getMask($maskPattern, $i, $j) { switch ($maskPattern) { case QR_MASK_PATTERN000 : return ($i + $j) % 2 == 0; case QR_MASK_PATTERN001 : return $i % 2 == 0; case QR_MASK_PATTERN010 : return $j % 3 == 0; case QR_MASK_PATTERN011 : return ($i + $j) % 3 == 0; case QR_MASK_PATTERN100 : return (floor($i / 2) + floor($j / 3) ) % 2 == 0; case QR_MASK_PATTERN101 : return ($i * $j) % 2 + ($i * $j) % 3 == 0; case QR_MASK_PATTERN110 : return ( ($i * $j) % 2 + ($i * $j) % 3) % 2 == 0; case QR_MASK_PATTERN111 : return ( ($i * $j) % 3 + ($i + $j) % 2) % 2 == 0; default : trigger_error("mask:$maskPattern", E_USER_ERROR); } } static function getLostPoint($qrCode) { $moduleCount = $qrCode->getModuleCount(); $lostPoint = 0; // LEVEL1 for ($row = 0; $row < $moduleCount; $row++) { for ($col = 0; $col < $moduleCount; $col++) { $sameCount = 0; $dark = $qrCode->isDark($row, $col); for ($r = -1; $r <= 1; $r++) { if ($row + $r < 0 || $moduleCount <= $row + $r) { continue; } for ($c = -1; $c <= 1; $c++) { if ($col + $c < 0 || $moduleCount <= $col + $c) { continue; } if ($r == 0 && $c == 0) { continue; } if ($dark == $qrCode->isDark($row + $r, $col + $c) ) { $sameCount++; } } } if ($sameCount > 5) { $lostPoint += (3 + $sameCount - 5); } } } // LEVEL2 for ($row = 0; $row < $moduleCount - 1; $row++) { for ($col = 0; $col < $moduleCount - 1; $col++) { $count = 0; if ($qrCode->isDark($row, $col ) ) $count++; if ($qrCode->isDark($row + 1, $col ) ) $count++; if ($qrCode->isDark($row, $col + 1) ) $count++; if ($qrCode->isDark($row + 1, $col + 1) ) $count++; if ($count == 0 || $count == 4) { $lostPoint += 3; } } } // LEVEL3 for ($row = 0; $row < $moduleCount; $row++) { for ($col = 0; $col < $moduleCount - 6; $col++) { if ($qrCode->isDark($row, $col) && !$qrCode->isDark($row, $col + 1) && $qrCode->isDark($row, $col + 2) && $qrCode->isDark($row, $col + 3) && $qrCode->isDark($row, $col + 4) && !$qrCode->isDark($row, $col + 5) && $qrCode->isDark($row, $col + 6) ) { $lostPoint += 40; } } } for ($col = 0; $col < $moduleCount; $col++) { for ($row = 0; $row < $moduleCount - 6; $row++) { if ($qrCode->isDark($row, $col) && !$qrCode->isDark($row + 1, $col) && $qrCode->isDark($row + 2, $col) && $qrCode->isDark($row + 3, $col) && $qrCode->isDark($row + 4, $col) && !$qrCode->isDark($row + 5, $col) && $qrCode->isDark($row + 6, $col) ) { $lostPoint += 40; } } } // LEVEL4 $darkCount = 0; for ($col = 0; $col < $moduleCount; $col++) { for ($row = 0; $row < $moduleCount; $row++) { if ($qrCode->isDark($row, $col) ) { $darkCount++; } } } $ratio = abs(100 * $darkCount / $moduleCount / $moduleCount - 50) / 5; $lostPoint += $ratio * 10; return $lostPoint; } static function getMode($s) { if (QRUtil::isAlphaNum($s) ) { if (QRUtil::isNumber($s) ) { return QR_MODE_NUMBER; } return QR_MODE_ALPHA_NUM; } else if (QRUtil::isKanji($s) ) { return QR_MODE_KANJI; } else { return QR_MODE_8BIT_BYTE; } } static function isNumber($s) { for ($i = 0; $i < strlen($s); $i++) { $c = ord($s[$i]); if (!(QRUtil::toCharCode('0') <= $c && $c <= QRUtil::toCharCode('9') ) ) { return false; } } return true; } static function isAlphaNum($s) { for ($i = 0; $i < strlen($s); $i++) { $c = ord($s[$i]); if (!(QRUtil::toCharCode('0') <= $c && $c <= QRUtil::toCharCode('9') ) && !(QRUtil::toCharCode('A') <= $c && $c <= QRUtil::toCharCode('Z') ) && strpos(" $%*+-./:", $s[$i]) === false) { return false; } } return true; } static function isKanji($s) { $data = $s; $i = 0; while ($i + 1 < strlen($data) ) { $c = ( (0xff & ord($data[$i]) ) << 8) | (0xff & ord($data[$i + 1]) ); if (!(0x8140 <= $c && $c <= 0x9FFC) && !(0xE040 <= $c && $c <= 0xEBBF) ) { return false; } $i += 2; } if ($i < strlen($data) ) { return false; } return true; } static function toCharCode($s) { return ord($s[0]); } static function getBCHTypeInfo($data) { $d = $data << 10; while (QRUtil::getBCHDigit($d) - QRUtil::getBCHDigit(QR_G15) >= 0) { $d ^= (QR_G15 << (QRUtil::getBCHDigit($d) - QRUtil::getBCHDigit(QR_G15) ) ); } return ( ($data << 10) | $d) ^ QR_G15_MASK; } static function getBCHTypeNumber($data) { $d = $data << 12; while (QRUtil::getBCHDigit($d) - QRUtil::getBCHDigit(QR_G18) >= 0) { $d ^= (QR_G18 << (QRUtil::getBCHDigit($d) - QRUtil::getBCHDigit(QR_G18) ) ); } return ($data << 12) | $d; } static function getBCHDigit($data) { $digit = 0; while ($data != 0) { $digit++; $data >>= 1; } return $digit; } } //--------------------------------------------------------------- // QRRSBlock //--------------------------------------------------------------- $QR_RS_BLOCK_TABLE = array( // L // M // Q // H // 1 array(1, 26, 19), array(1, 26, 16), array(1, 26, 13), array(1, 26, 9), // 2 array(1, 44, 34), array(1, 44, 28), array(1, 44, 22), array(1, 44, 16), // 3 array(1, 70, 55), array(1, 70, 44), array(2, 35, 17), array(2, 35, 13), // 4 array(1, 100, 80), array(2, 50, 32), array(2, 50, 24), array(4, 25, 9), // 5 array(1, 134, 108), array(2, 67, 43), array(2, 33, 15, 2, 34, 16), array(2, 33, 11, 2, 34, 12), // 6 array(2, 86, 68), array(4, 43, 27), array(4, 43, 19), array(4, 43, 15), // 7 array(2, 98, 78), array(4, 49, 31), array(2, 32, 14, 4, 33, 15), array(4, 39, 13, 1, 40, 14), // 8 array(2, 121, 97), array(2, 60, 38, 2, 61, 39), array(4, 40, 18, 2, 41, 19), array(4, 40, 14, 2, 41, 15), // 9 array(2, 146, 116), array(3, 58, 36, 2, 59, 37), array(4, 36, 16, 4, 37, 17), array(4, 36, 12, 4, 37, 13), // 10 array(2, 86, 68, 2, 87, 69), array(4, 69, 43, 1, 70, 44), array(6, 43, 19, 2, 44, 20), array(6, 43, 15, 2, 44, 16) ); class QRRSBlock { var $totalCount; var $dataCount; function QRRSBlock($totalCount, $dataCount) { $this->totalCount = $totalCount; $this->dataCount = $dataCount; } function getDataCount() { return $this->dataCount; } function getTotalCount() { return $this->totalCount; } static function getRSBlocks($typeNumber, $errorCorrectLevel) { $rsBlock = QRRSBlock::getRsBlockTable($typeNumber, $errorCorrectLevel); $length = count($rsBlock) / 3; $list = array(); for ($i = 0; $i < $length; $i++) { $count = $rsBlock[$i * 3 + 0]; $totalCount = $rsBlock[$i * 3 + 1]; $dataCount = $rsBlock[$i * 3 + 2]; for ($j = 0; $j < $count; $j++) { $list[] = new QRRSBlock($totalCount, $dataCount); } } return $list; } static function getRsBlockTable($typeNumber, $errorCorrectLevel) { global $QR_RS_BLOCK_TABLE; switch($errorCorrectLevel) { case QR_ERROR_CORRECT_LEVEL_L : return $QR_RS_BLOCK_TABLE[($typeNumber - 1) * 4 + 0]; case QR_ERROR_CORRECT_LEVEL_M : return $QR_RS_BLOCK_TABLE[($typeNumber - 1) * 4 + 1]; case QR_ERROR_CORRECT_LEVEL_Q : return $QR_RS_BLOCK_TABLE[($typeNumber - 1) * 4 + 2]; case QR_ERROR_CORRECT_LEVEL_H : return $QR_RS_BLOCK_TABLE[($typeNumber - 1) * 4 + 3]; default : trigger_error("tn:$typeNumber/ecl:$errorCorrectLevel", E_USER_ERROR); } } } //--------------------------------------------------------------- // QRNumber //--------------------------------------------------------------- class QRNumber extends QRData { function QRNumber($data) { QRData::QRData(QR_MODE_NUMBER, $data); } function write(&$buffer) { $data = $this->getData(); $i = 0; while ($i + 2 < strlen($data) ) { $num = QRNumber::parseInt(substr($data, $i, 3) ); $buffer->put($num, 10); $i += 3; } if ($i < strlen($data) ) { if (strlen($data) - $i == 1) { $num = QRNumber::parseInt(substr($data, $i, $i + 1) ); $buffer->put($num, 4); } else if (strlen($data) - $i == 2) { $num = QRNumber::parseInt(substr($data, $i, $i + 2) ); $buffer->put($num, 7); } } } function getLength() { return strlen($this->getData() ); } static function parseInt($s) { $num = 0; for ($i = 0; $i < strlen($s); $i++) { $num = $num * 10 + QRNumber::parseIntAt(ord($s[$i]) ); } return $num; } static function parseIntAt($c) { if (QRUtil::toCharCode('0') <= $c && $c <= QRUtil::toCharCode('9') ) { return $c - QRUtil::toCharCode('0'); } trigger_error("illegal char : $c", E_USER_ERROR); } } //--------------------------------------------------------------- // QRKanji //--------------------------------------------------------------- class QRKanji extends QRData { function QRKanji($data) { QRData::QRData(QR_MODE_KANJI, $data); } function write(&$buffer) { $data = $this->getData(); $i = 0; while ($i + 1 < strlen($data) ) { $c = ( (0xff & ord($data[$i]) ) << 8) | (0xff & ord($data[$i + 1]) ); if (0x8140 <= $c && $c <= 0x9FFC) { $c -= 0x8140; } else if (0xE040 <= $c && $c <= 0xEBBF) { $c -= 0xC140; } else { trigger_error("illegal char at " . ($i + 1) . "/$c", E_USER_ERROR); } $c = ( ($c >> 8) & 0xff) * 0xC0 + ($c & 0xff); $buffer->put($c, 13); $i += 2; } if ($i < strlen($data) ) { trigger_error("illegal char at " . ($i + 1), E_USER_ERROR); } } function getLength() { return floor(strlen($this->getData() ) / 2); } } //--------------------------------------------------------------- // QRAlphaNum //--------------------------------------------------------------- class QRAlphaNum extends QRData { function QRAlphaNum($data) { QRData::QRData(QR_MODE_ALPHA_NUM, $data); } function write(&$buffer) { $i = 0; $c = $this->getData(); while ($i + 1 < strlen($c) ) { $buffer->put(QRAlphaNum::getCode(ord($c[$i]) ) * 45 + QRAlphaNum::getCode(ord($c[$i + 1]) ), 11); $i += 2; } if ($i < strlen($c) ) { $buffer->put(QRAlphaNum::getCode(ord($c[$i])), 6); } } function getLength() { return strlen($this->getData() ); } static function getCode($c) { if (QRUtil::toCharCode('0') <= $c && $c <= QRUtil::toCharCode('9') ) { return $c - QRUtil::toCharCode('0'); } else if (QRUtil::toCharCode('A') <= $c && $c <= QRUtil::toCharCode('Z') ) { return $c - QRUtil::toCharCode('A') + 10; } else { switch ($c) { case QRUtil::toCharCode(' ') : return 36; case QRUtil::toCharCode('$') : return 37; case QRUtil::toCharCode('%') : return 38; case QRUtil::toCharCode('*') : return 39; case QRUtil::toCharCode('+') : return 40; case QRUtil::toCharCode('-') : return 41; case QRUtil::toCharCode('.') : return 42; case QRUtil::toCharCode('/') : return 43; case QRUtil::toCharCode(':') : return 44; default : trigger_error("illegal char : $c", E_USER_ERROR); } } } } //--------------------------------------------------------------- // QR8BitByte //--------------------------------------------------------------- class QR8BitByte extends QRData { function QR8BitByte($data) { QRData::QRData(QR_MODE_8BIT_BYTE, $data); } function write(&$buffer) { $data = $this->getData(); for ($i = 0; $i < strlen($data); $i++) { $buffer->put(ord($data[$i]), 8); } } function getLength() { return strlen($this->getData() ); } } //--------------------------------------------------------------- // QRData //--------------------------------------------------------------- class QRData { var $mode; var $data; function QRData($mode, $data) { $this->mode = $mode; $this->data = $data; } function getMode() { return $this->mode; } function getData() { return $this->data; } function getLength() { trigger_error("not implemented.", E_USER_ERROR); } function write(&$buffer) { trigger_error("not implemented.", E_USER_ERROR); } function getLengthInBits($type) { if (1 <= $type && $type < 10) { // 1 - 9 switch($this->mode) { case QR_MODE_NUMBER : return 10; case QR_MODE_ALPHA_NUM : return 9; case QR_MODE_8BIT_BYTE : return 8; case QR_MODE_KANJI : return 8; default : trigger_error("mode:$this->mode", E_USER_ERROR); } } else if ($type < 27) { // 10 - 26 switch($this->mode) { case QR_MODE_NUMBER : return 12; case QR_MODE_ALPHA_NUM : return 11; case QR_MODE_8BIT_BYTE : return 16; case QR_MODE_KANJI : return 10; default : trigger_error("mode:$this->mode", E_USER_ERROR); } } else if ($type < 41) { // 27 - 40 switch($this->mode) { case QR_MODE_NUMBER : return 14; case QR_MODE_ALPHA_NUM : return 13; case QR_MODE_8BIT_BYTE : return 16; case QR_MODE_KANJI : return 12; default : trigger_error("mode:$this->mode", E_USER_ERROR); } } else { trigger_error("mode:$this->mode", E_USER_ERROR); } } } //--------------------------------------------------------------- // QRMath //--------------------------------------------------------------- $QR_MATH_EXP_TABLE = null; $QR_MATH_LOG_TABLE = null; class QRMath { static function init() { global $QR_MATH_EXP_TABLE; global $QR_MATH_LOG_TABLE; $QR_MATH_EXP_TABLE = QRMath::createNumArray(256); for ($i = 0; $i < 8; $i++) { $QR_MATH_EXP_TABLE[$i] = 1 << $i; } for ($i = 8; $i < 256; $i++) { $QR_MATH_EXP_TABLE[$i] = $QR_MATH_EXP_TABLE[$i - 4] ^ $QR_MATH_EXP_TABLE[$i - 5] ^ $QR_MATH_EXP_TABLE[$i - 6] ^ $QR_MATH_EXP_TABLE[$i - 8]; } $QR_MATH_LOG_TABLE = QRMath::createNumArray(256); for ($i = 0; $i < 255; $i++) { $QR_MATH_LOG_TABLE[$QR_MATH_EXP_TABLE[$i] ] = $i; } } static function createNumArray($length) { $num_array = array(); for ($i = 0; $i < $length; $i++) { $num_array[] = 0; } return $num_array; } static function glog($n) { global $QR_MATH_LOG_TABLE; if ($n < 1) { trigger_error("log($n)", E_USER_ERROR); } return $QR_MATH_LOG_TABLE[$n]; } static function gexp($n) { global $QR_MATH_EXP_TABLE; while ($n < 0) { $n += 255; } while ($n >= 256) { $n -= 255; } return $QR_MATH_EXP_TABLE[$n]; } } // init static table QRMath::init(); //--------------------------------------------------------------- // QRPolynomial //--------------------------------------------------------------- class QRPolynomial { var $num; function QRPolynomial($num, $shift = 0) { $offset = 0; while ($offset < count($num) && $num[$offset] == 0) { $offset++; } $this->num = QRMath::createNumArray(count($num) - $offset + $shift); for ($i = 0; $i < count($num) - $offset; $i++) { $this->num[$i] = $num[$i + $offset]; } } function get($index) { return $this->num[$index]; } function getLength() { return count($this->num); } // PHP5 function __toString() { return $this->toString(); } function toString() { $buffer = ""; for ($i = 0; $i < $this->getLength(); $i++) { if ($i > 0) { $buffer .= ","; } $buffer .= $this->get($i); } return $buffer; } function toLogString() { $buffer = ""; for ($i = 0; $i < $this->getLength(); $i++) { if ($i > 0) { $buffer .= ","; } $buffer .= QRMath::glog($this->get(i) ); } return $buffer; } function multiply($e) { $num = QRMath::createNumArray($this->getLength() + $e->getLength() - 1); for ($i = 0; $i < $this->getLength(); $i++) { for ($j = 0; $j < $e->getLength(); $j++) { $num[$i + $j] ^= QRMath::gexp(QRMath::glog($this->get($i) ) + QRMath::glog($e->get($j) ) ); } } return new QRPolynomial($num); } function mod($e) { if ($this->getLength() - $e->getLength() < 0) { return $this; } $ratio = QRMath::glog($this->get(0) ) - QRMath::glog($e->get(0) ); $num = QRMath::createNumArray($this->getLength() ); for ($i = 0; $i < $this->getLength(); $i++) { $num[$i] = $this->get($i); } for ($i = 0; $i < $e->getLength(); $i++) { $num[$i] ^= QRMath::gexp(QRMath::glog($e->get($i) ) + $ratio); } $newPolynomial = new QRPolynomial($num); return $newPolynomial->mod($e); } } //--------------------------------------------------------------- // Mode //--------------------------------------------------------------- define("QR_MODE_NUMBER", 1 << 0); define("QR_MODE_ALPHA_NUM", 1 << 1); define("QR_MODE_8BIT_BYTE", 1 << 2); define("QR_MODE_KANJI", 1 << 3); //--------------------------------------------------------------- // MaskPattern //--------------------------------------------------------------- define("QR_MASK_PATTERN000", 0); define("QR_MASK_PATTERN001", 1); define("QR_MASK_PATTERN010", 2); define("QR_MASK_PATTERN011", 3); define("QR_MASK_PATTERN100", 4); define("QR_MASK_PATTERN101", 5); define("QR_MASK_PATTERN110", 6); define("QR_MASK_PATTERN111", 7); //--------------------------------------------------------------- // ErrorCorrectLevel // 7%. define("QR_ERROR_CORRECT_LEVEL_L", 1); // 15%. define("QR_ERROR_CORRECT_LEVEL_M", 0); // 25%. define("QR_ERROR_CORRECT_LEVEL_Q", 3); // 30%. define("QR_ERROR_CORRECT_LEVEL_H", 2); //--------------------------------------------------------------- // QRBitBuffer //--------------------------------------------------------------- class QRBitBuffer { var $buffer; var $length; function QRBitBuffer() { $this->buffer = array(); $this->length = 0; } function getBuffer() { return $this->buffer; } function getLengthInBits() { return $this->length; } function __toString() { $buffer = ""; for ($i = 0; $i < $this->getLengthInBits(); $i++) { $buffer .= $this->get($i)? '1' : '0'; } return $buffer; } function get($index) { $bufIndex = floor($index / 8); return ( ($this->buffer[$bufIndex] >> (7 - $index % 8) ) & 1) == 1; } function put($num, $length) { for ($i = 0; $i < $length; $i++) { $this->putBit( ( ($num >> ($length - $i - 1) ) & 1) == 1); } } function putBit($bit) { $bufIndex = floor($this->length / 8); if (count($this->buffer) <= $bufIndex) { $this->buffer[] = 0; } if ($bit) { $this->buffer[$bufIndex] |= (0x80 >> ($this->length % 8) ); } $this->length++; } }
用法:
<?php require_once("qrcode.php"); $qr = new QRCode(); // エラー訂正レベルを設定 // QR_ERROR_CORRECT_LEVEL_L : 7% // QR_ERROR_CORRECT_LEVEL_M : 15% // QR_ERROR_CORRECT_LEVEL_Q : 25% // QR_ERROR_CORRECT_LEVEL_H : 30% $qr->setErrorCorrectLevel(QR_ERROR_CORRECT_LEVEL_L); // 型番(大きさ)を設定 // 1~10 $qr->setTypeNumber(3); // データ(文字列※)を設定 // ※日本語はSJIS $qr->addData("this is gideon ! ikeepstudying.com !@#$%^&*"); // QRコードを作成 $qr->make(); // HTML出力 echo $qr->output('7px'); // or $qr->printHTML();
更多语言方法:https://github.com/kazuhikoarase/qrcode-generator (javascript,java,ruby…)