PHPHighlight

PHPHighlight is a PHP syntax highlighting library that can be easily customized and extended.

How it works

The library parses the text, finds the <pre> and <pre><code> tags, reads the attributes (data-lang, data-file, data-theme) and highlights the syntax of the code block.

Recommended: Use <pre><code> pattern for better semantics and compatibility with Markdown output.

Supports style customization. Here are examples of styling:

Requirements

PHP 8.1+

Installation

You can install package via composer

$ composer require demyanovs/php-highlight

Usage

See full example in examples/index.php

<?php

require_once 'vendor/autoload.php';

use Demyanovs\PHPHighlight\Highlighter;
use Demyanovs\PHPHighlight\Themes\ObsidianTheme;

$text = '
<pre><code class="language-php" data-file="php-highlight/examples/index.php">
&lt;?php
abstract class AbstractClass
{
    /**
     * Our abstract method only needs to define the required arguments
     */
    abstract protected function prefixName(string $name): string;
}

class ConcreteClass extends AbstractClass
{
    /**
     * Our child class may define optional arguments not in the parent\'s signature
     */
    public function prefixName(string $name): string
    {
        $prefix = "";
        if ($name === "Pacman") {
            $prefix = "Mr.";
        } elseif ($name === "Pacwoman") {
            $prefix = "Mrs.";
        } else {
            
        }
        
        return $prefix . " " . $name;
    }
}

$class = new ConcreteClass;
echo $class->prefixName("Pacman"), "\n";
echo $class->prefixName("Pacwoman"), "\n";
</code></pre>
';

$highlighter = (new Highlighter($text, ObsidianTheme::TITLE))
        ->showLineNumbers(true)
        ->showActionPanel(true);
echo $highlighter->parse();

Customization

$highlighter->showLineNumbers(true);
$highlighter->showActionPanel(true);

You can set following attributes in <pre> or <code> tags:

<pre><code class="language-php" data-file="example.php" data-theme="darkula">
// or
<pre data-lang="php" data-file="example.php" data-theme="darkula"><code>

• data-lang or class="language-*" - a language of the text. This affects how the parser will highlight the syntax.
• data-file - show file name in action panel.
• data-theme - allows to overwrite the global theme.

Note: class="language-*" on <code> tag is automatically recognized (common in Markdown output).

How to create a custom theme

To create a custom theme you need to create an instance of Demyanovs\PHPHighlight\Themes\Theme class and pass it to Highlighter as a third argument:

use Demyanovs\PHPHighlight\Highlighter;
use Demyanovs\PHPHighlight\Themes\Theme;
use Demyanovs\PHPHighlight\Themes\Dto\DefaultColorSchemaDto;
use Demyanovs\PHPHighlight\Themes\Dto\PHPColorSchemaDto;
use Demyanovs\PHPHighlight\Themes\Dto\XMLColorSchemaDto;

$defaultColorSchemaDto = new DefaultColorSchemaDto(
    '#000000', // background
    '#ffffff', // default text
    '#888888', // comment
    '#ff0000', // keyword
    '#00ff00', // string
    '#0000ff', // number
    '#ffff00'  // variable
);

$PHPColorSchemaDto = new PHPColorSchemaDto(
    '#0000BB', // keyword
    '#FF8000', // variable
    '#fbc201', // function
    '#007700', // string
    '#DD0000'  // comment
);

$XMLColorSchemaDto = new XMLColorSchemaDto(
    '#008000', // tag
    '#7D9029', // attribute
    '#BA2121', // string
    '#BC7A00'  // comment
);

$myTheme = new Theme(
    'myThemeTitle',
    $defaultColorSchemaDto,
    $PHPColorSchemaDto,
    $XMLColorSchemaDto
);

$highlighter = new Highlighter($text, 'myThemeTitle', [$myTheme]);

Supports language syntax

• PHP
• JavaScript
• XML/HTML
• Bash
• Go
• and others

Themes

• default
• darkula
• railscasts
• obsidian
• far
• vs2015
• c64

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

Changelog

See CHANGELOG.md for a list of changes and version history.

License

MIT