## qrcode.php

##### Tags

### Table of Contents

#### Classes

#### Constants

- MAX_STRUCTURED_SYMBOLS = 16
- Max number of symbols for structured mode
- N1 = 3
- Down point base value for case 1 mask pattern (concatenation of same color in a line or a column)
- N2 = 3
- Down point base value for case 2 mask pattern (module block of same color)
- N3 = 40
- Down point base value for case 3 mask pattern (1:1:3:1:1(dark:bright:dark:bright:dark)pattern in a line or a column)
- N4 = 10
- Down point base value for case 4 mask pattern (ration of dark modules in whole)
- QR_DEFAULT_MASK = 2
- when QR_FIND_BEST_MASK === false
- QR_ECLEVEL_H = 3
- Error correction level H : About 30% or less errors can be corrected.
- QR_ECLEVEL_L = 0
- Error correction level L : About 7% or less errors can be corrected.
- QR_ECLEVEL_M = 1
- Error correction level M : About 15% or less errors can be corrected.
- QR_ECLEVEL_Q = 2
- Error correction level Q : About 25% or less errors can be corrected.
- 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
- 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
- QR_MODE_8B = 2
- Encoding mode 8bit byte data. In theory, 2953 characters or less can be stored in a QRcode.
- QR_MODE_AN = 1
- Encoding mode alphanumeric (0-9A-Z $%*+-./:) 45characters. 2 characters are encoded to 11bit length. In theory, 4296 characters or less can be stored in a QRcode.
- QR_MODE_KJ = 3
- Encoding mode KANJI. A KANJI character (multibyte character) is encoded to 13bit length. In theory, 1817 characters or less can be stored in a QRcode.
- QR_MODE_NL = -1
- Encoding mode
- QR_MODE_NM = 0
- Encoding mode numeric (0-9). 3 characters are encoded to 10bit length. In theory, 7089 characters or less can be stored in a QRcode.
- QR_MODE_ST = 4
- Encoding mode STRUCTURED (currently unsupported)
- QRCAP_EC = 3
- Matrix index to get error correction level from $capacity array.
- QRCAP_REMINDER = 2
- Matrix index to get remainder from $capacity array.
- QRCAP_WIDTH = 0
- Matrix index to get width from $capacity array.
- QRCAP_WORDS = 1
- Matrix index to get number of words from $capacity array.
- QRCODEDEFS = \true
- Indicate that definitions for this class are set
- QRSPEC_VERSION_MAX = 40
- Maximum QR Code version.
- QRSPEC_WIDTH_MAX = 177
- Maximum matrix size for maximum version (version 40 is 177*177 matrix).
- STRUCTURE_HEADER_BITS = 20
- Number of header bits for structured mode

### Constants

#### MAX_STRUCTURED_SYMBOLS

Max number of symbols for structured mode

```
public mixed MAX_STRUCTURED_SYMBOLS =
16
```

#### N1

Down point base value for case 1 mask pattern (concatenation of same color in a line or a column)

`public mixed N1 = 3`

#### N2

Down point base value for case 2 mask pattern (module block of same color)

`public mixed N2 = 3`

#### N3

Down point base value for case 3 mask pattern (1:1:3:1:1(dark:bright:dark:bright:dark)pattern in a line or a column)

`public mixed N3 = 40`

#### N4

Down point base value for case 4 mask pattern (ration of dark modules in whole)

`public mixed N4 = 10`

#### QR_DEFAULT_MASK

when QR_FIND_BEST_MASK === false

```
public mixed QR_DEFAULT_MASK =
2
```

#### QR_ECLEVEL_H

Error correction level H : About 30% or less errors can be corrected.

`public mixed QR_ECLEVEL_H = 3`

#### QR_ECLEVEL_L

Error correction level L : About 7% or less errors can be corrected.

`public mixed QR_ECLEVEL_L = 0`

#### QR_ECLEVEL_M

Error correction level M : About 15% or less errors can be corrected.

`public mixed QR_ECLEVEL_M = 1`

#### QR_ECLEVEL_Q

Error correction level Q : About 25% or less errors can be corrected.

`public mixed QR_ECLEVEL_Q = 2`

#### QR_FIND_BEST_MASK

if true, estimates best mask (spec. default, but extremally slow; set to false to significant performance boost but (propably) worst quality code

```
public mixed QR_FIND_BEST_MASK =
\true
```

#### QR_FIND_FROM_RANDOM

if false, checks all masks available, otherwise value tells count of masks need to be checked, mask id are got randomly

```
public mixed QR_FIND_FROM_RANDOM =
2
```

#### QR_MODE_8B

Encoding mode 8bit byte data. In theory, 2953 characters or less can be stored in a QRcode.

`public mixed QR_MODE_8B = 2`

#### QR_MODE_AN

Encoding mode alphanumeric (0-9A-Z $%*+-./:) 45characters. 2 characters are encoded to 11bit length. In theory, 4296 characters or less can be stored in a QRcode.

`public mixed QR_MODE_AN = 1`

#### QR_MODE_KJ

Encoding mode KANJI. A KANJI character (multibyte character) is encoded to 13bit length. In theory, 1817 characters or less can be stored in a QRcode.

`public mixed QR_MODE_KJ = 3`

#### QR_MODE_NL

Encoding mode

`public mixed QR_MODE_NL = -1`

#### QR_MODE_NM

Encoding mode numeric (0-9). 3 characters are encoded to 10bit length. In theory, 7089 characters or less can be stored in a QRcode.

`public mixed QR_MODE_NM = 0`

#### QR_MODE_ST

Encoding mode STRUCTURED (currently unsupported)

`public mixed QR_MODE_ST = 4`

#### QRCAP_EC

Matrix index to get error correction level from $capacity array.

`public mixed QRCAP_EC = 3`

#### QRCAP_REMINDER

Matrix index to get remainder from $capacity array.

```
public mixed QRCAP_REMINDER =
2
```

#### QRCAP_WIDTH

Matrix index to get width from $capacity array.

`public mixed QRCAP_WIDTH = 0`

#### QRCAP_WORDS

Matrix index to get number of words from $capacity array.

`public mixed QRCAP_WORDS = 1`

#### QRCODEDEFS

Indicate that definitions for this class are set

`public mixed QRCODEDEFS = \true`

#### QRSPEC_VERSION_MAX

Maximum QR Code version.

```
public mixed QRSPEC_VERSION_MAX =
40
```

#### QRSPEC_WIDTH_MAX

Maximum matrix size for maximum version (version 40 is 177*177 matrix).

```
public mixed QRSPEC_WIDTH_MAX =
177
```

#### STRUCTURE_HEADER_BITS

Number of header bits for structured mode

```
public mixed STRUCTURE_HEADER_BITS =
20
```