### Clone escpos-php and Install Dependencies with Composer

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Fetches a copy of the escpos-php project from GitHub and installs its PHP dependencies using Composer. This is the initial setup step for development.

```Bash
git clone https://github.com/mike42/escpos-php
cd escpos-php/
composer install
```

--------------------------------

### Clone Repository and Install PHP Dependencies with Composer

Source: https://github.com/mike42/escpos-php/blob/development/CONTRIBUTING.md

Instructions to clone the `escpos-php` repository and install its PHP dependencies using Composer, preparing the environment for development.

```Bash
git clone https://github.com/mike42/escpos-php
cd escpos-php/
composer install
```

--------------------------------

### Generate a 'Hello World' Receipt with PHP

Source: https://github.com/mike42/escpos-php/blob/development/README.md

A basic PHP script demonstrating how to initialize the ESC/POS printer driver, print 'Hello World!', cut the paper, and close the connection. This example uses a FilePrintConnector to output to standard output.

```PHP
<?php
/* Call this file 'hello-world.php' */
require __DIR__ . '/vendor/autoload.php';
use Mike42\Escpos\PrintConnectors\FilePrintConnector;
use Mike42\Escpos\Printer;
$connector = new FilePrintConnector("php://stdout");
$printer = new Printer($connector);
$printer -> text("Hello World!\n");
$printer -> cut();
$printer -> close();
```

--------------------------------

### Install ESC/POS PHP Library with Composer

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Instructions to add the mike42/escpos-php library to your PHP project using Composer, the PHP dependency manager.

```Bash
composer require mike42/escpos-php
```

--------------------------------

### Send 'Hello World' Receipt to Various Printer Interfaces

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Examples of command-line commands to send the 'hello-world.php' output to different printer interfaces, including Ethernet (netcat), USB local (Linux), CUPS server (Linux), and shared network printers (Windows).

```Bash
php hello-world.php | nc 10.x.x.x. 9100
```

```Bash
php hello-world.php > /dev/usb/lp0
```

```Bash
php hello-world.php > foo.txt
lpr -o raw -H localhost -P printer foo.txt
```

```Windows Command Line
php hello-world.php > foo.txt
net use LPT1 \\server\printer
copy foo.txt LPT1
del foo.txt
```

--------------------------------

### Connect to Serial Printer using FilePrintConnector

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Example of using `FilePrintConnector` to connect to a serial printer, typically found at a device path like `/dev/ttyS0` on Linux systems.

```PHP
use Mike42\Escpos\PrintConnectors\FilePrintConnector;
use Mike42\Escpos\Printer;
$connector = new FilePrintConnector("/dev/ttyS0");
$printer = new Printer($connector);
```

--------------------------------

### JavaScript AJAX Function for RawBT Printing

Source: https://github.com/mike42/escpos-php/blob/development/example/rawbt-receipt.html

Implements an AJAX function `ajax_print` designed to send a GET request to a specified URL, typically a backend endpoint for print data. Upon successful response, it redirects the browser to the received data. The function also provides visual feedback by changing the button text during the request lifecycle.

```JavaScript
// for php demo call function ajax_print(url, btn) { b = $(btn); b.attr('data-old', b.text()); b.text('wait'); $.get(url, function (data) { window.location.href = data; // main action }).fail(function () { alert("ajax error"); }).always(function () { b.text(b.attr('data-old')); }) }
```

--------------------------------

### PHP Printer Class: Print Image (Graphics)

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Prints an image to the printer using the EscposImage object and an optional size modifier. Supported size modifiers include IMG_DEFAULT, IMG_DOUBLE_WIDTH, and IMG_DOUBLE_HEIGHT. A minimal PHP example demonstrates loading an image and printing it.

```APIDOC
graphics(EscposImage $img, int $size)
  $img: The image to print.
  $size: Output size modifier for the image.
    Size modifiers: IMG_DEFAULT, IMG_DOUBLE_WIDTH, IMG_DOUBLE_HEIGHT
```

```php
<?php
$img = EscposImage::load("logo.png");
$printer -> graphics($img);
```

--------------------------------

### Execute PHP Unit Tests with PHPUnit

Source: https://github.com/mike42/escpos-php/blob/development/CONTRIBUTING.md

Command to run the unit tests for the `escpos-php` project using PHPUnit, including text coverage reporting.

```Bash
php vendor/bin/phpunit --coverage-text
```

--------------------------------

### Styling for RawBT Integration Demo Page

Source: https://github.com/mike42/escpos-php/blob/development/example/rawbt-receipt.html

Defines the basic visual styles for the RawBT integration demo page, including background colors, layout constraints, button appearance, preformatted text styling, and link decorations.

```CSS
html { background-color: grey; padding: 32px; } body { max-width: 640px; margin: 0 auto; padding: 32px; background-color: white; } button { background-color: #6e89ff; color: white; padding: 16px; border: none; } pre { background-color: #f0f0f0; border-left: #6e89ff solid 3px } p { text-align: right; } a { color: #6e89ff; text-decoration: none; } a:before{ content: '\1F855'; margin-right:4px; }
```

--------------------------------

### Rebuild Doxygen Developer Documentation

Source: https://github.com/mike42/escpos-php/blob/development/CONTRIBUTING.md

Commands to clean and rebuild the developer documentation using Doxygen, allowing for checking of documentation warnings.

```Bash
make -C doc clean && make -C doc
```

--------------------------------

### Execute PHPUnit Unit Tests with Coverage

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Runs the project's unit tests using PHPUnit, displaying code coverage information. This helps verify the correctness of the code.

```Bash
php vendor/bin/phpunit --coverage-text
```

--------------------------------

### Load 'Simple' CapabilityProfile for Basic Printer Features

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Illustrates how to load the 'simple' `CapabilityProfile` to instruct the ESC/POS driver to use only basic features, suitable for new or less advanced printer brands, ensuring compatibility with ASCII-only text and simpler image handling.

```PHP
use Mike42\Escpos\PrintConnectors\WindowsPrintConnector;
use Mike42\Escpos\CapabilityProfile;
$profile = CapabilityProfile::load("simple");
$connector = new WindowsPrintConnector("smb://computer/printer");
$printer = new Printer($connector, $profile);
```

--------------------------------

### JavaScript Browser Redirection for RawBT Data

Source: https://github.com/mike42/escpos-php/blob/development/example/rawbt-receipt.html

Demonstrates a direct browser redirection using `window.location.href` to a URL or data string provided by `ajax_backend_data`. This is a common pattern for initiating a print action or opening a new resource after an asynchronous operation.

```JavaScript
window.location.href = ajax_backend_data;
```

--------------------------------

### Load 'SP2000' CapabilityProfile for Star Printers

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Shows how to load a specific `CapabilityProfile`, such as 'SP2000', for Star-branded printers, which require different command sets compared to default Epson TM-series printers.

```PHP
use Mike42\Escpos\PrintConnectors\WindowsPrintConnector;
use Mike42\Escpos\CapabilityProfile;
$profile = CapabilityProfile::load("SP2000");
$connector = new WindowsPrintConnector("smb://computer/printer");
$printer = new Printer($connector, $profile);
```

--------------------------------

### Connect to Network Printer using NetworkPrintConnector

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Demonstrates how to establish a connection to an ESC/POS printer over a network using the `NetworkPrintConnector` class, specifying an IP address and port. Includes error handling with a `try...finally` block to ensure the printer connection is closed.

```PHP
use Mike42\Escpos\PrintConnectors\NetworkPrintConnector;
use Mike42\Escpos\Printer;
$connector = new NetworkPrintConnector("10.x.x.x", 9100);
$printer = new Printer($connector);
try {
    // ... Print stuff
} finally {
    $printer -> close();
}
```

--------------------------------

### Rebuild Developer Documentation with Doxygen

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Cleans and rebuilds the developer documentation using Doxygen. This step is important to check for documentation warnings and ensure the docs are up-to-date.

```Bash
make -C doc clean && make -C doc
```

--------------------------------

### PHP Printer Class Constructor

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Constructs a new Printer object, initializing it with a PrintConnector for data transmission and an optional CapabilityProfile to define supported printer features. If no profile is provided, a default suitable for Epson printers is used.

```APIDOC
__construct(PrintConnector $connector, CapabilityProfile $profile)
  $connector: The PrintConnector to send data to.
  $profile: Supported features of this printer. If not set, the "default" CapabilityProfile will be used, which is suitable for Epson printers.
```

--------------------------------

### Check PHP Code Style with PHP_CodeSniffer (PSR-2)

Source: https://github.com/mike42/escpos-php/blob/development/CONTRIBUTING.md

Command to check the PHP code style against the PSR-2 standard using PHP_CodeSniffer, specifically for the `src/` directory, without fixing issues.

```Bash
php vendor/bin/phpcs --standard=psr2 src/ -n
```

--------------------------------

### PHP Printer Class: Initialize Printer

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Resets the printer's formatting settings back to their default values. This is useful for ensuring a clean state before printing new content.

```APIDOC
initialize()
```

--------------------------------

### PHP ESC/POS: Select Print Mode

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Selects various print modes for text formatting, such as font, emphasis, and size. Multiple modes can be combined using bitwise OR.

```APIDOC
selectPrintMode(int $mode)
  $mode: The mode to use. Default is Printer::MODE_FONT_A, with no special formatting. This has a similar effect to running initialize().
  Valid modes (can be OR'd):
    MODE_FONT_A
    MODE_FONT_B
    MODE_EMPHASIZED
    MODE_DOUBLE_HEIGHT
    MODE_DOUBLE_WIDTH
    MODE_UNDERLINE
```

--------------------------------

### Check PHP PSR-2 Coding Standard with PHP_CodeSniffer

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Verifies that the PHP source code adheres to the PSR-2 coding standard using PHP_CodeSniffer. This ensures code consistency and readability.

```Bash
php vendor/bin/phpcs --standard=psr2 src/ -n
```

--------------------------------

### PHP ESC/POS: Print QR Code

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Prints a QR code on the printer with specified content, error correction level, pixel size, and model. Numeric data is more efficiently compacted.

```APIDOC
qrCode(string $content, int $ec, int $size, int $model)
  $content: The content of the code. Numeric data will be more efficiently compacted.
  $ec: Error-correction level to use. One of Printer::QR_ECLEVEL_L (default), Printer::QR_ECLEVEL_M, Printer::QR_ECLEVEL_Q or Printer::QR_ECLEVEL_H. Higher error correction results in a less compact code.
  $size: Pixel size to use. Must be 1-16 (default 3)
  $model: QR code model to use. Must be one of Printer::QR_MODEL_1, Printer::QR_MODEL_2 (default) or Printer::QR_MICRO (not supported by all printers).
```

--------------------------------

### PHP ESC/POS: Select Font

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Selects the font to be used for printing. Most printers support Font A and B, some also Font C.

```APIDOC
setFont(int $font)
  $font: The font to use. Must be either Printer::FONT_A, Printer::FONT_B, or Printer::FONT_C.
```

--------------------------------

### PHP ESC/POS: Generate Cash Drawer Pulse

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Generates a pulse to open a cash drawer connected to the printer. Configurable for specific pins and pulse timings.

```APIDOC
pulse(int $pin, int $on_ms, int $off_ms)
  $pin: 0 or 1, for pin 2 or pin 5 kick-out connector respectively.
  $on_ms: pulse ON time, in milliseconds.
  $off_ms: pulse OFF time, in milliseconds.
```

--------------------------------

### PHP Printer Class: Print Bit Image (Fallback)

Source: https://github.com/mike42/escpos-php/blob/development/README.md

This method is a fallback for printing images, taking an EscposImage object and a size modifier. It is superseded by the `graphics()` method for newer printers. An additional fallback, `bitImageColumnFormat()`, is also available.

```APIDOC
bitImage(EscposImage $image, $size)
  See graphics() for parameters.
```

--------------------------------

### PHP ESC/POS: Select Text Justification

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Sets the horizontal alignment for printed text (left, center, or right).

```APIDOC
setJustification(int $justification)
  $justification: One of Printer::JUSTIFY_LEFT, Printer::JUSTIFY_CENTER, or Printer::JUSTIFY_RIGHT.
```

--------------------------------

### PHP ESC/POS: Toggle Reverse Color Mode

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Enables or disables reverse color mode, printing white text on a black background.

```APIDOC
setReverseColors(boolean $on)
  $on: True to enable, false to disable.
```

--------------------------------

### PHP Printer Class: Form Feed

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Performs a form feed command, which is required by some printers to release paper. This command is primarily useful in page mode, which is not implemented in this driver.

```APIDOC
feedForm()
```

--------------------------------

### PHP Printer Class: Reverse Feed Lines

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Feeds the printer paper in reverse by a specified number of lines. If no number is specified, it defaults to one line.

```APIDOC
feedReverse(int $lines)
  $lines: Number of lines to feed. If not specified, 1 line will be fed.
```

--------------------------------

### PHP ESC/POS: Select Print Color

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Selects the print color on printers that support multiple colors. Defaults to COLOR_1.

```APIDOC
setColor(int $color)
  $color: Color to use. Must be either Printer::COLOR_1 (default), or Printer::COLOR_2
```

--------------------------------

### PHP Printer Class: Feed Lines

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Feeds the printer paper by a specified number of lines. This is used to advance the paper after printing.

```APIDOC
feed(int $lines)
  $lines: Number of lines to feed
```

--------------------------------

### PHP Printer Class: Cut Paper

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Cuts the printer paper, allowing for full or partial cuts. The method also specifies the number of lines to feed before performing the cut. Default cut mode is full, and default lines to feed is 3.

```APIDOC
cut(int $mode, int $lines)
  $mode: Cut mode, either Printer::CUT_FULL or Printer::CUT_PARTIAL. If not specified, Printer::CUT_FULL will be used.
  $lines: Number of lines to feed before cutting. If not specified, 3 will be used.
```

--------------------------------

### PHP ESC/POS: Set Line Spacing

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Sets the height of each line in dots. Smaller values can cause lines to overlap on some printers.

```APIDOC
setLineSpacing(int $height)
  $height: The height of each line, in dots. If not set, the printer will reset to its default line spacing.
```

--------------------------------

### PHP ESC/POS: Add Text to Buffer

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Adds a string of text to the printer's buffer. A line-break or `feed()` call is typically required afterwards.

```APIDOC
text(string $str)
  $str: The string to print.
```

--------------------------------

### PHP ESC/POS: Set Underline Mode

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Sets the underline style for printed text, allowing no underline, single, or double underline.

```APIDOC
setUnderline(int $underline)
  $underline: Either true/false, or one of Printer::UNDERLINE_NONE, Printer::UNDERLINE_SINGLE or Printer::UNDERLINE_DOUBLE. Defaults to Printer::UNDERLINE_SINGLE.
```

--------------------------------

### PHP Printer Class: Print Barcode

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Prints a barcode on the printer using the specified content and barcode standard. Supports various standards like UPCA, CODE39, and ITF. Note that some standards are numeric-only, and non-numeric input may cause unexpected behavior.

```APIDOC
barcode(string $content, int $type)
  $content: The information to encode.
  $type: The barcode standard to output. If not specified, Printer::BARCODE_CODE39 will be used.
    Supported standards: BARCODE_UPCA, BARCODE_UPCE, BARCODE_JAN13, BARCODE_JAN8, BARCODE_CODE39, BARCODE_ITF, BARCODE_CODABAR
```

--------------------------------

### PHP Printer Class: Print PDF417 Barcode

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Prints a two-dimensional data code using the PDF417 standard. Allows customization of module width, height, data column count, error correction ratio, and code options (standard or truncated).

```APIDOC
pdf417Code(string $content, number $width, number $heightMultiplier, number $dataColumnCount, real $ec, number $options)
  $content: Text or numbers to store in the code.
  $width: Width of a module (pixel) in the printed code. Default is 3 dots.
  $heightMultiplier: Multiplier for height of a module. Default is 3 times the width.
  $dataColumnCount: Number of data columns to use. 0 (default) is to auto-calculate. Smaller numbers will result in a narrower code, making larger pixel sizes possible. Larger numbers require smaller pixel sizes.
  $ec: Error correction ratio, from 0.01 to 4.00. Default is 0.10 (10%).
  $options: Standard code Printer::PDF417_STANDARD with start/end bars, or truncated code Printer::PDF417_TRUNCATED with start bars only.
```

--------------------------------

### PHP ESC/POS: Set Print Area Width

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Sets the total width of the print area in dots, effectively adding a right margin. Can be reset to default using `initialize()`.

```APIDOC
setPrintWidth(int $width)
  $width: The width of the page print area, in dots.
```

--------------------------------

### PHP ESC/POS: Toggle Emphasized Mode

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Enables or disables emphasized printing mode, making text appear bolder.

```APIDOC
setEmphasis(boolean $on)
  $on: true for emphasis, false for no emphasis.
```

--------------------------------

### PHP ESC/POS: Set Print Area Left Margin

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Sets the left margin for the print area in dots. Can be reset to default using `initialize()`.

```APIDOC
setPrintLeftMargin(int $margin)
  $margin: The left margin to set on to the print area, in dots.
```

--------------------------------

### PHP ESC/POS: Set Text Size

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Sets the size of printed text as a multiple of the normal size, for both width and height.

```APIDOC
setTextSize(int $widthMultiplier, int $heightMultiplier)
  $widthMultiplier: Multiple of the regular height to use (range 1 - 8).
  $heightMultiplier: Multiple of the regular height to use (range 1 - 8).
```

--------------------------------

### PHP ESC/POS: Toggle Double-Strike Mode

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Enables or disables double-strike printing mode, which prints characters twice for a bolder appearance.

```APIDOC
setDoubleStrike(boolean $on)
  $on: true for double strike, false for no double strike.
```

--------------------------------

### PHP ESC/POS: Set Barcode Height

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Sets the height of barcodes in dots. If not specified, a default height of 8 dots is used.

```APIDOC
setBarcodeHeight(int $height)
  $height: Height in dots. If not specified, 8 will be used.
```

--------------------------------

### PHP ESC/POS: Set Barcode Bar Width

Source: https://github.com/mike42/escpos-php/blob/development/README.md

Sets the width of barcode bars in dots. Values above 6 appear to have no additional effect.

```APIDOC
setBarcodeWidth(int $width)
  $width: Bar width in dots. If not specified, 3 will be used. Values above 6 appear to have no effect.
```

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