A PHP QRcode class to share with you_PHP Tutorial
Class code:
define('QR_MODE_NUL', -1);
define('QR_MODE_NUM', 0);
define('QR_MODE_AN', 1);
define('QR_MODE_8', 2);
define('QR_MODE_KANJI', 3);
define('QR_MODE_STRUCTURE', 4);
// Levels of error correction.
define('QR_ECLEVEL_L', 0);
define('QR_ECLEVEL_M', 1);
define('QR_ECLEVEL_Q', 2);
define('QR_ECLEVEL_H', 3);
// Supported output formats
define('QR_FORMAT_TEXT', 0);
define('QR_FORMAT_PNG', 1);
class qrstr {
public static function set(&$srctab, $x, $y, $repl, $replLen = false) {
$srctab[$y] = substr_replace($srctab[$y], ($replLen !== false)?substr($repl,0,$replLen):$repl, $x, ($replLen !== false)?$replLen:strlen($repl));
}
}
define('QR_CACHEABLE', false); // use cache - more disk reads but less CPU power, masks and format templates are stored there
define('QR_CACHE_DIR', false); // used when QR_CACHEABLE === true
define('QR_LOG_DIR', false); // default error logs dir
define('QR_FIND_BEST_MASK', true); // if true, estimates best mask (spec. default, but extremally slow; set to false to significant performance boost but (propably) worst quality code
define('QR_FIND_FROM_RANDOM', 2); // if false, checks all masks available, otherwise value tells count of masks need to be checked, mask id are got randomly
define('QR_DEFAULT_MASK', 2); // when QR_FIND_BEST_MASK === false
define('QR_PNG_MAXIMUM_SIZE', 1024); // maximum allowed png image width (in pixels), tune to make sure GD and PHP can handle such big images
class QRtools {
public static function binarize($frame){
$len = count($frame);
foreach ($frame as &$frameLine) {
for($i=0; $i<$len; $i++) {
$frameLine[$i] = (ord($frameLine[$i])&1)?'1':'0';
}
}
return $frame;
}
public static function tcpdfBarcodeArray($code, $mode = 'QR,L', $tcPdfVersion = '4.5.037'){
$barcode_array = array();
if (!is_array($mode))
$mode = explode(',', $mode);
$eccLevel = 'L';
if (count($mode) > 1) {
$eccLevel = $mode[1];
}
$qrTab = QRcode::text($code, false, $eccLevel);
$size = count($qrTab);
$barcode_array['num_rows'] = $size;
$barcode_array['num_cols'] = $size;
$barcode_array['bcode'] = array();
foreach ($qrTab as $line) {
$arrAdd = array();
foreach(str_split($line) as $char)
$arrAdd[] = ($char=='1')?1:0;
$barcode_array['bcode'][] = $arrAdd;
}
return $barcode_array;
}
public static function clearCache(){
self::$frames = array();
}
public static function buildCache(){
QRtools::markTime('before_build_cache');
$mask = new QRmask();
for ($a=1; $a <= QRSPEC_VERSION_MAX; $a++) {
$frame = QRspec::newFrame($a);
if (QR_IMAGE) {
$fileName = QR_CACHE_DIR.'frame_'.$a.'.png';
QRimage::png(self::binarize($frame), $fileName, 1, 0);
}
$width = count($frame);
$bitMask = array_fill(0, $width, array_fill(0, $width, 0));
for ($maskNo=0; $maskNo<8; $maskNo++)
$mask->makeMaskNo($maskNo, $width, $frame, $bitMask, true);
}
QRtools::markTime('after_build_cache');
}
public static function log($outfile, $err){
if (QR_LOG_DIR !== false) {
if ($err != '') {
if ($outfile !== false) {
file_put_contents(QR_LOG_DIR.basename($outfile).'-errors.txt', date('Y-m-d H:i:s').': '.$err, FILE_APPEND);
} else {
file_put_contents(QR_LOG_DIR.'errors.txt', date('Y-m-d H:i:s').': '.$err, FILE_APPEND);
}
}
}
}
public static function dumpMask($frame){
$width = count($frame);
for($y=0;$y<$width;$y++) {
for($x=0;$x<$width;$x++) {
echo ord($frame[$y][$x]).',';
}
}
}
public static function markTime($markerId){
list($usec, $sec) = explode(" ", microtime());
$time = ((float)$usec + (float)$sec);
if (!isset($GLOBALS['qr_time_bench']))
$GLOBALS['qr_time_bench'] = array();
$GLOBALS['qr_time_bench'][$markerId] = $time;
}
public static function timeBenchmark(){
self::markTime('finish');
$lastTime = 0;
$startTime = 0;
$p = 0;
echo '
BENCHMARK | |
till '.$markerId.': | '.number_format($thisTime-$lastTime, 6).'s |
---|---|
TOTAL: | '.number_format($lastTime-$startTime, 6).'s |
}
}
//##########################################################################
QRtools::markTime('start');
define('QRSPEC_VERSION_MAX', 40);
define('QRSPEC_WIDTH_MAX', 177);
define('QRCAP_WIDTH', 0);
define('QRCAP_WORDS', 1);
define('QRCAP_REMINDER', 2);
define('QRCAP_EC', 3);
class QRspec {
public static $capacity = array(
array( 0, 0, 0, array( 0, 0, 0, 0)),
array( 21, 26, 0, array( 7, 10, 13, 17)), // 1
array( 25, 44, 7, array( 10, 16, 22, 28)),
array( 29, 70, 7, array( 15, 26, 36, 44)),
array( 33, 100, 7, array( 20, 36, 52, 64)),
array( 37, 134, 7, array( 26, 48, 72, 88)), // 5
array( 41, 172, 7, array( 36, 64, 96, 112)),
array( 45, 196, 0, array( 40, 72, 108, 130)),
array( 49, 242, 0, array( 48, 88, 132, 156)),
array( 53, 292, 0, array( 60, 110, 160, 192)),
array( 57, 346, 0, array( 72, 130, 192, 224)), //10
array( 61, 404, 0, array( 80, 150, 224, 264)),
array( 65, 466, 0, array( 96, 176, 260, 308)),
array( 69, 532, 0, array( 104, 198, 288, 352)),
array( 73, 581, 3, array( 120, 216, 320, 384)),
array( 77, 655, 3, array( 132, 240, 360, 432)), //15
array( 81, 733, 3, array( 144, 280, 408, 480)),
array( 85, 815, 3, array( 168, 308, 448, 532)),
array( 89, 901, 3, array( 180, 338, 504, 588)),
array( 93, 991, 3, array( 196, 364, 546, 650)),
array( 97, 1085, 3, array( 224, 416, 600, 700)), //20
array(101, 1156, 4, array( 224, 442, 644, 750)),
array(105, 1258, 4, array( 252, 476, 690, 816)),
array(109, 1364, 4, array( 270, 504, 750, 900)),
array(113, 1474, 4, array( 300, 560, 810, 960)),
array(117, 1588, 4, array( 312, 588, 870, 1050)), //25
array(121, 1706, 4, array( 336, 644, 952, 1110)),
array(125, 1828, 4, array( 360, 700, 1020, 1200)),
array(129, 1921, 3, array( 390, 728, 1050, 1260)),
array(133, 2051, 3, array( 420, 784, 1140, 1350)),
array(137, 2185, 3, array( 450, 812, 1200, 1440)), //30
array(141, 2323, 3, array( 480, 868, 1290, 1530)),
array(145, 2465, 3, array( 510, 924, 1350, 1620)),
array(149, 2611, 3, array( 540, 980, 1440, 1710)),
array(153, 2761, 3, array( 570, 1036, 1530, 1800)),
array(157, 2876, 0, array( 570, 1064, 1590, 1890)), //35
array(161, 3034, 0, array( 600, 1120, 1680, 1980)),
array(165, 3196, 0, array( 630, 1204, 1770, 2100)),
array(169, 3362, 0, array( 660, 1260, 1860, 2220)),
array(173, 3532, 0, array( 720, 1316, 1950, 2310)),
array(177, 3706, 0, array( 750, 1372, 2040, 2430)) //40
);
public static function getDataLength($version, $level){
return self::$capacity[$version][QRCAP_WORDS] - self::$capacity[$version][QRCAP_EC][$level];
}
public static function getECCLength($version, $level){
return self::$capacity[$version][QRCAP_EC][$level];
}
public static function getWidth($version){
return self::$capacity[$version][QRCAP_WIDTH];
}
public static function getRemainder($version){
return self::$capacity[$version][QRCAP_REMINDER];
}
public static function getMinimumVersion($size, $level){
for($i=1; $i<= QRSPEC_VERSION_MAX; $i++) {
$words = self::$capacity[$i][QRCAP_WORDS] - self::$capacity[$i][QRCAP_EC][$level];
if($words >= $size)
return $i;
}
return -1;
}
//######################################################################
public static $lengthTableBits = array(
array(10, 12, 14),
array( 9, 11, 13),
array( 8, 16, 16),
array( 8, 10, 12)
);
public static function lengthIndicator($mode, $version){
if ($mode == QR_MODE_STRUCTURE)
return 0;
if ($version <= 9) {
$l = 0;
} else if ($version <= 26) {
$l = 1;
} else {
$l = 2;
}
return self::$lengthTableBits[$mode][$l];
}
public static function maximumWords($mode, $version){
if($mode == QR_MODE_STRUCTURE)
return 3;
if($version <= 9) {
$l = 0;
} else if($version <= 26) {
$l = 1;
} else {
$l = 2;
}
$bits = self::$lengthTableBits[$mode][$l];
$words = (1 << $bits) - 1;
if($mode == QR_MODE_KANJI) {
$words *= 2; // the number of bytes is required
}
return $words;
}
public static $eccTable = array(
array(array( 0, 0), array( 0, 0), array( 0, 0), array( 0, 0)),
array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)), // 1
array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)),
array(array( 1, 0), array( 1, 0), array( 2, 0), array( 2, 0)),
array(array( 1, 0), array( 2, 0), array( 2, 0), array( 4, 0)),
array(array( 1, 0), array( 2, 0), array( 2, 2), array( 2, 2)), // 5
array(array( 2, 0), array( 4, 0), array( 4, 0), array( 4, 0)),
array(array( 2, 0), array( 4, 0), array( 2, 4), array( 4, 1)),
array(array( 2, 0), array( 2, 2), array( 4, 2), array( 4, 2)),
array(array( 2, 0), array( 3, 2), array( 4, 4), array( 4, 4)),
array(array( 2, 2), array( 4, 1), array( 6, 2), array( 6, 2)), //10
array(array( 4, 0), array( 1, 4), array( 4, 4), array( 3, 8)),
array(array( 2, 2), array( 6, 2), array( 4, 6), array( 7, 4)),
array(array( 4, 0), array( 8, 1), array( 8, 4), array(12, 4)),
array(array( 3, 1), array( 4, 5), array(11, 5), array(11, 5)),
array(array( 5, 1), array( 5, 5), array( 5, 7), array(11, 7)), //15
array(array( 5, 1), array( 7, 3), array(15, 2), array( 3, 13)),
array(array( 1, 5), array(10, 1), array( 1, 15), array( 2, 17)),
array(array( 5, 1), array( 9, 4), array(17, 1), array( 2, 19)),
array(array( 3, 4), array( 3, 11), array(17, 4), array( 9, 16)),
array(array( 3, 5), array( 3, 13), array(15, 5), array(15, 10)), //20
array(array( 4, 4), array(17, 0), array(17, 6), array(19, 6)),
array(array( 2, 7), array(17, 0), array( 7, 16), array(34, 0)),
array(array( 4, 5), array( 4, 14), array(11, 14), array(16, 14)),
array(array( 6, 4), array( 6, 14), array(11, 16), array(30, 2)),
array(array( 8, 4), array( 8, 13), array( 7, 22), array(22, 13)), //25
array(array(10, 2), array(19, 4), array(28, 6), array(33, 4)),
array(array( 8, 4), array(22, 3), array( 8, 26), array(12, 28)),
array(array( 3, 10), array( 3, 23), array( 4, 31), array(11, 31)),
array(array( 7, 7), array(21, 7), array( 1, 37), array(19, 26)),
array(array( 5, 10), array(19, 10), array(15, 25), array(23, 25)), //30
array(array(13, 3), array( 2, 29), array(42, 1), array(23, 28)),
array(array(17, 0), array(10, 23), array(10, 35), array(19, 35)),
array(array(17, 1), array(14, 21), array(29, 19), array(11, 46)),
array(array(13, 6), array(14, 23), array(44, 7), array(59, 1)),
array(array(12, 7), array(12, 26), array(39, 14), array(22, 41)), //35
array(array( 6, 14), array( 6, 34), array(46, 10), array( 2, 64)),
array(array(17, 4), array(29, 14), array(49, 10), array(24, 46)),
array(array( 4, 18), array(13, 32), array(48, 14), array(42, 32)),
array(array(20, 4), array(40, 7), array(43, 22), array(10, 67)),
array(array(19, 6), array(18, 31), array(34, 34), array(20, 61)),//40
);
// CACHEABLE!!!
public static function getEccSpec($version, $level, array &$spec){
if (count($spec) < 5) {
$spec = array(0,0,0,0,0);
}
$b1 = self::$eccTable[$version][$level][0];
$b2 = self::$eccTable[$version][$level][1];
$data = self::getDataLength($version, $level);
$ecc = self::getECCLength($version, $level);
if($b2 == 0) {
$spec[0] = $b1;
$spec[1] = (int)($data / $b1);
$spec[2] = (int)($ecc / $b1);
$spec[3] = 0;
$spec[4] = 0;
} else {
$spec[0] = $b1;
$spec[1] = (int)($data / ($b1 + $b2));
$spec[2] = (int)($ecc / ($b1 + $b2));
$spec[3] = $b2;
$spec[4] = $spec[1] + 1;
}
}
public static $alignmentPattern = array(
array( 0, 0),
array( 0, 0), array(18, 0), array(22, 0), array(26, 0), array(30, 0), // 1- 5
array(34, 0), array(22, 38), array(24, 42), array(26, 46), array(28, 50), // 6-10
array(30, 54), array(32, 58), array(34, 62), array(26, 46), array(26, 48), //11-15
array(26, 50), array(30, 54), array(30, 56), array(30, 58), array(34, 62), //16-20
array(28, 50), array(26, 50), array(30, 54), array(28, 54), array(32, 58), //21-25
array(30, 58), array(34, 62), array(26, 50), array(30, 54), array(26, 52), //26-30
array(30, 56), array(34, 60), array(30, 58), array(34, 62), array(30, 54), //31-35
array(24, 50), array(28, 54), array(32, 58), array(26, 54), array(30, 58), //35-40
);
public static function putAlignmentMarker(array &$frame, $ox, $oy){
$finder = array(
"xa1xa1xa1xa1xa1",
"xa1xa0xa0xa0xa1",
"xa1xa0xa1xa0xa1",
"xa1xa0xa0xa0xa1",
"xa1xa1xa1xa1xa1"
);
$yStart = $oy-2;
$xStart = $ox-2;
for($y=0; $y<5; $y++) {
QRstr::set($frame, $xStart, $yStart+$y, $finder[$y]);
}
}
public static function putAlignmentPattern($version, &$frame, $width){
if($version < 2)
return;
$d = self::$alignmentPattern[$version][1] - self::$alignmentPattern[$version][0];
if($d < 0) {
$w = 2;
}else {
$w = (int)(($width - self::$alignmentPattern[$version][0]) / $d + 2);
}
if($w * $w - 3 == 1) {
$x = self::$alignmentPattern[$version][0];
$y = self::$alignmentPattern[$version][0];
self::putAlignmentMarker($frame, $x, $y);
return;
}
$cx = self::$alignmentPattern[$version][0];
for($x=1; $x<$w - 1; $x++) {
self::putAlignmentMarker($frame, 6, $cx);
self::putAlignmentMarker($frame, $cx, 6);
$cx += $d;
}
$cy = self::$alignmentPattern[$version][0];
for($y=0; $y<$w-1; $y++) {
$cx = self::$alignmentPattern[$version][0];
for($x=0; $x<$w-1; $x++) {
self::putAlignmentMarker($frame, $cx, $cy);
$cx += $d;
}
$cy += $d;
}
}
public static $versionPattern = array(
0x07c94, 0x085bc, 0x09a99, 0x0a4d3, 0x0bbf6, 0x0c762, 0x0d847, 0x0e60d,
0x0f928, 0x10b78, 0x1145d, 0x12a17, 0x13532, 0x149a6, 0x15683, 0x168c9,
0x177ec, 0x18ec4, 0x191e1, 0x1afab, 0x1b08e, 0x1cc1a, 0x1d33f, 0x1ed75,
0x1f250, 0x209d5, 0x216f0, 0x228ba, 0x2379f, 0x24b0b, 0x2542e, 0x26a64,
0x27541, 0x28c69
);
public static function getVersionPattern($version){
if($version < 7 || $version > QRSPEC_VERSION_MAX)
return 0;
return self::$versionPattern[$version -7];
}
// Format information --------------------------------------------------
// See calcFormatInfo in tests/test_qrspec.c (orginal qrencode c lib)
public static $formatInfo = array(
array(0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976),
array(0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0),
array(0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed),
array(0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b)
);
public static function getFormatInfo($mask, $level){
if($mask < 0 || $mask > 7)
return 0;
if($level < 0 || $level > 3)
return 0;
return self::$formatInfo[$level][$mask];
}
// Frame ---------------------------------------------------------------
// Cache of initial frames.
public static $frames = array();
public static function putFinderPattern(&$frame, $ox, $oy){
$finder = array(
"xc1xc1xc1xc1xc1xc1xc1",
"xc1xc0xc0xc0xc0xc0xc1",
"xc1xc0xc1xc1xc1xc0xc1",
"xc1xc0xc1xc1xc1xc0xc1",
"xc1xc0xc1xc1xc1xc0xc1",
"xc1xc0xc0xc0xc0xc0xc1",
"xc1xc1xc1xc1xc1xc1xc1"
);
for($y=0; $y<7; $y++) {
QRstr::set($frame, $ox, $oy+$y, $finder[$y]);
}
}
public static function createFrame($version){
$width = self::$capacity[$version][QRCAP_WIDTH];
$frameLine = str_repeat (" ", $width);
$frame = array_fill(0, $width, $frameLine);
// Finder pattern
self::putFinderPattern($frame, 0, 0);
self::putFinderPattern($frame, $width - 7, 0);
self::putFinderPattern($frame, 0, $width - 7);
// Separator
$yOffset = $width - 7;
for($y=0; $y<7; $y++) {
$frame[$y][7] = "xc0";
$frame[$y][$width - 8] = "xc0";
$frame[$yOffset][7] = "xc0";
$yOffset++;
}
$setPattern = str_repeat("xc0", 8);
QRstr::set($frame, 0, 7, $setPattern);
QRstr::set($frame, $width-8, 7, $setPattern);
QRstr::set($frame, 0, $width - 8, $setPattern);
// Format info
$setPattern = str_repeat("x84", 9);
QRstr::set($frame, 0, 8, $setPattern);
QRstr::set($frame, $width - 8, 8, $setPattern, 8);
$yOffset = $width - 8;
for($y=0; $y<8; $y++,$yOffset++) {
$frame[$y][8] = "x84";
$frame[$yOffset][8] = "x84";
}
// Timing pattern
for($i=1; $i<$width-15; $i++) {
$frame[6][7+$i] = chr(0x90 | ($i & 1));
$frame[7+$i][6] = chr(0x90 | ($i & 1));
}
// Alignment pattern
self::putAlignmentPattern($version, $frame, $width);
// Version information
if($version >= 7) {
$vinf = self::getVersionPattern($version);
$v = $vinf;
for($x=0; $x<6; $x++) {
for($y=0; $y<3; $y++) {
$frame[($width - 11)+$y][$x] = chr(0x88 | ($v & 1));
$v = $v >> 1;
}
}
$v = $vinf;
for($y=0; $y<6; $y++) {
for($x=0; $x<3; $x++) {
$frame[$y][$x+($width - 11)] = chr(0x88 | ($v & 1));
$v = $v >> 1;
}
}
}
// and a little bit...
$frame[$width - 8][8] = "x81";
return $frame;
}
public static function debug($frame, $binary_mode = false){
if ($binary_mode) {
foreach ($frame as &$frameLine) {
$frameLine = join(' ', explode('0', $frameLine));
$frameLine = join('██', explode('1', $frameLine));
}
echo '
<tt><br/ ><br/ ><br/ > '; <br>echo join("<br/ > ", $frame); <br>echo '</tt>
';
} else {
foreach ($frame as &$frameLine) {
$frameLine = join(' ', explode("xc0", $frameLine));
$frameLine = join('▒', explode("xc1", $frameLine));
$frameLine = join(' ', explode("xa0", $frameLine));
$frameLine = join('▒', explode("xa1", $frameLine));
$frameLine = join('◇', explode("x84", $frameLine)); //format 0
$frameLine = join('◆', explode("x85", $frameLine)); //format 1
$frameLine = join('☢', explode("x81", $frameLine)); //special bit
$frameLine = join(' ', explode("x90", $frameLine)); //clock 0
$frameLine = join('◷', explode("x91", $frameLine)); //clock 1
$frameLine = join(' ', explode("x88", $frameLine)); //version
$frameLine = join('▒', explode("x89", $frameLine)); //version
$frameLine = join('♦', explode("x01", $frameLine));
$frameLine = join('⋅', explode("

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Arrays are linear data structures used to process data in programming. Sometimes when we are processing arrays we need to add new elements to the existing array. In this article, we will discuss several ways to add elements to the end of an array in PHP, with code examples, output, and time and space complexity analysis for each method. Here are the different ways to add elements to an array: Use square brackets [] In PHP, the way to add elements to the end of an array is to use square brackets []. This syntax only works in cases where we want to add only a single element. The following is the syntax: $array[] = value; Example
