### Install Parsedown PHP Library via Composer

Source: https://github.com/erusev/parsedown/blob/master/README.md

This snippet demonstrates the standard way to install the Parsedown Markdown parser using Composer. Running this command adds Parsedown as a dependency to your PHP project, making it available for use.

```bash
composer require erusev/parsedown
```

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

### Basic Inline Markdown Link

Source: https://github.com/erusev/parsedown/blob/master/test/data/text_reference.html

Demonstrates a standard inline Markdown link with a simple label and URL, representing the most common link syntax.

```Markdown
[reference link](http://example.com)
```

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

### Bold Markdown Formatting

Source: https://github.com/erusev/parsedown/blob/master/test/data/markup_consecutive_two_lines.html

Presents text formatted with bold markdown syntax using double asterisks. This example verifies Parsedown's ability to correctly interpret and render bold text.

```Markdown
**Markdown**
```

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

### Standard Markdown Link Syntax

Source: https://github.com/erusev/parsedown/blob/master/test/data/inline_link.html

Demonstrates the basic syntax for creating a hyperlink in Markdown, where the clickable text is enclosed in square brackets followed immediately by the URL in parentheses.

```Markdown
[link](http://example.com)
```

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

### Literal Escaped Reference-Style String

Source: https://github.com/erusev/parsedown/blob/master/test/data/text_reference.html

An example of text that resembles a reference-style link but is escaped with backslashes, ensuring it is rendered as literal text and not parsed as a link.

```Markdown
\[one\]\[404\] with no definition
```

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

### Markdown Inline Code Span Syntax Examples

Source: https://github.com/erusev/parsedown/blob/master/test/data/code_span.md

Illustrates different ways to define inline code spans in Markdown, including simple phrases, single backticks, and content containing backticks, using various backtick delimiters.

```plaintext
code span
```

```plaintext
this is also a codespan
```

```plaintext
and look at this one!
```

```plaintext
`
```

```plaintext
`foo`
```

```plaintext
sth `` sth
```

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

### Markdown Link with Image and Additional Text

Source: https://github.com/erusev/parsedown/blob/master/test/data/inline_link.html

Illustrates a Markdown link where the clickable area includes both an image and additional descriptive text, allowing for more complex link content.

```Markdown
![MD Logo](http://parsedown.org/md.png) and text](http://example.com)
```

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

### Markdown Link Enclosed in Parentheses

Source: https://github.com/erusev/parsedown/blob/master/test/data/inline_link.html

Illustrates a Markdown link that is itself wrapped within parentheses as part of the surrounding text, demonstrating how Markdown handles such contextual formatting.

```Markdown
([link](/index.php)) in parentheses
```

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

### Inline Markdown Link with Trailing Text

Source: https://github.com/erusev/parsedown/blob/master/test/data/text_reference.html

Shows an inline link immediately followed by additional descriptive text on the same line, testing parser separation.

```Markdown
[one](http://example.com) with a semantic name
```

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

### Single-line Partial Markdown

Source: https://github.com/erusev/parsedown/blob/master/test/data/markup_consecutive_two_lines.html

Demonstrates how Parsedown handles text that might appear to be multi-line but is provided as a single line of input. This example shows a simple phrase without special formatting.

```Markdown
and partial markup on two lines.
```

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

### PHP Fenced Code Block Example

Source: https://github.com/erusev/parsedown/blob/master/test/data/fenced_code_block.md

Demonstrates a basic PHP fenced code block with a variable assignment and output, as parsed by Parsedown.

```php
<?php

$message = 'fenced code block';
echo $message;
```

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

### Basic Markdown Table Syntax

Source: https://github.com/erusev/parsedown/blob/master/test/data/simple_table.md

Demonstrates a standard Markdown table with two headers and two rows, using hyphens for the header separator. This is the most common and straightforward table format.

```Markdown
header 1 | header 2
-------- | --------
cell 1.1 | cell 1.2
cell 2.1 | cell 2.2
```

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

### Basic PHP Variable and Echo

Source: https://github.com/erusev/parsedown/blob/master/test/data/code_block.html

A simple PHP snippet demonstrating how to declare a string variable and print its value to standard output using the 'echo' construct.

```php
<?php

$message = 'Hello World!';
echo $message;
```

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

### Markdown: Strong with Nested Emphasis

Source: https://github.com/erusev/parsedown/blob/master/test/data/em_strong.html

Illustrates a phrase starting with bold text, followed by text that is both bold and italic due to nested emphasis within the strong tag. The entire phrase is bold, with a portion also italic.

```Markdown
**strong _em strong_**
```

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

### Markdown Link with Parentheses in URL

Source: https://github.com/erusev/parsedown/blob/master/test/data/inline_link.html

Shows how to correctly create a Markdown link when the URL itself contains parentheses. The URL is fully enclosed within the link's parentheses to ensure proper parsing.

```Markdown
[link](/url-(parentheses)) with parentheses in URL
```

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

### Demonstrate JavaScript URI XSS in Markdown Images

Source: https://github.com/erusev/parsedown/blob/master/test/data/xss_bad_url.html

Similar to links, these examples illustrate how 'javascript:' URIs can be embedded within Markdown image syntax ('![alt](url)'). If not properly sanitized, these can execute arbitrary JavaScript when the image source is loaded, leading to XSS.

```Markdown
![xss](javascript%3Aalert(1))
```

```Markdown
![xss](javascript%3A//alert(1))
```

```Markdown
![xss](javascript&colon;alert(1))
```

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

### Markdown Unterminated Fenced Code Block Example

Source: https://github.com/erusev/parsedown/blob/master/test/data/fenced_code_block.md

Illustrates a markdown example where a fenced code block is not properly closed, showing how Parsedown might interpret the content within an incomplete block.

```markdown
the following isn't quite enough to close
```
still a fenced code block
```

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

### Escaped Markdown Example

Source: https://github.com/erusev/parsedown/blob/master/test/data/markup_consecutive_two_lines.html

Shows text that uses markdown escape characters or is not intended to be parsed as markdown. This highlights how Parsedown might render text that includes underscores but isn't italicized.

```Markdown
\_No markdown\_
```

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

### Demonstrate Data URI (HTML/JS) XSS in Markdown Images

Source: https://github.com/erusev/parsedown/blob/master/test/data/xss_bad_url.html

Similar to data URI links, these examples show how base64-encoded HTML with embedded JavaScript can be used as the source for Markdown images. This method can execute malicious scripts when the image is rendered, posing a significant XSS risk.

```Markdown
![xss](data%3Atext/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg==)
```

```Markdown
![xss](data%3A//text/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg==)
```

```Markdown
![xss](data&colon;text/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg==)
```

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

### Basic Markdown Text

Source: https://github.com/erusev/parsedown/blob/master/test/data/markup_consecutive_two_lines.html

Illustrates a simple line of text that Parsedown would process. This shows the most basic form of input without any special markdown syntax.

```Markdown
First markup
```

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

### Code-Formatted Text Followed by Parenthesized String

Source: https://github.com/erusev/parsedown/blob/master/test/data/text_reference.html

Demonstrates a code-formatted text span (`link`) immediately followed by a string in parentheses, illustrating that this combination is not parsed as a Markdown link.

```Markdown
`link`(http://example.com)
```

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

### Markdown Link with Base64 Encoded Image

Source: https://github.com/erusev/parsedown/blob/master/test/data/inline_link.html

Demonstrates embedding a base64 encoded image directly within the Markdown link syntax. This method is useful for including small images without requiring external file dependencies.

```Markdown
![MD Logo](data:image/png;base64,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
```

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

### Markdown Link with Image as Text

Source: https://github.com/erusev/parsedown/blob/master/test/data/inline_link.html

Shows how to use an image as the clickable element for a Markdown hyperlink. The image syntax is nested directly within the link's text brackets.

```Markdown
![MD Logo](http://parsedown.org/md.png)](http://example.com)
```

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

### Inline Link Testing Multiline Definition Context

Source: https://github.com/erusev/parsedown/blob/master/test/data/text_reference.html

An inline Markdown link used to test how the parser handles scenarios where the corresponding reference link definition might span multiple lines, even though the inline syntax itself is single-line.

```Markdown
[multiline one](http://example.com)
```

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

### Inline Link Testing Mixed Case Label Context

Source: https://github.com/erusev/parsedown/blob/master/test/data/text_reference.html

An inline Markdown link used to test the parser's behavior with mixed-case labels and their corresponding definitions, checking for case-insensitivity or specific handling.

```Markdown
[one](http://example.com)
```

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

### Inline Link Testing Label on Next Line Context

Source: https://github.com/erusev/parsedown/blob/master/test/data/text_reference.html

An inline Markdown link used to test how the parser handles scenarios where the link label might be followed by the URL on a subsequent line in a reference definition.

```Markdown
[one](http://example.com)
```

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

### Markdown Link with Backtick-Enclosed Text

Source: https://github.com/erusev/parsedown/blob/master/test/data/inline_link.html

Demonstrates using backticks to format the link text as inline code within a Markdown hyperlink, useful for referencing code elements or commands.

```Markdown
`link`(http://example.com)
```

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

### Markdown Link Title Syntax Examples

Source: https://github.com/erusev/parsedown/blob/master/test/data/inline_link_title.md

Demonstrates various ways to define the optional title attribute for Markdown links, including single quotes, double quotes, blank titles, titles with spaces, and URLs containing parentheses.

```Markdown
[single quotes](http://example.com 'Title')

[double quotes](http://example.com "Title")

[single quotes blank](http://example.com '')

[double quotes blank](http://example.com "")

[space](http://example.com "2 Words")

[parentheses](http://example.com/url-(parentheses) "Title")
```

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

### Markdown Table with Single Column

Source: https://github.com/erusev/parsedown/blob/master/test/data/simple_table.md

Shows a Markdown table with only one column. The header separator still uses hyphens, and alignment can be specified. This demonstrates flexibility in table structure.

```Markdown
header 1
:-------
cell 1.1
cell 2.1
```

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

### CSS Styling for Paragraphs

Source: https://github.com/erusev/parsedown/blob/master/test/data/block-level_html.html

This snippet demonstrates a basic CSS rule to set the color property for paragraph elements. It targets all 'p' tags and applies a specific hexadecimal color value.

```CSS
p {color: #789;}
```

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

### Basic Markdown Table Structure

Source: https://github.com/erusev/parsedown/blob/master/test/data/aligned_table.md

This snippet illustrates the fundamental syntax for creating a table in Markdown. It includes a header row, a separator line to define column alignment (left, center, right), and multiple data rows with cell content.

```Markdown
| header 1 | header 2 | header 2 |
| :------- | :------: | -------: |
| cell 1.1 | cell 1.2 | cell 1.3 |
| cell 2.1 | cell 2.2 | cell 2.3 |
```

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

### Markdown: Nested Emphasis within Strong

Source: https://github.com/erusev/parsedown/blob/master/test/data/em_strong.html

Demonstrates a phrase where emphasis (italic) is nested directly inside strong (bold) formatting. The entire phrase is both bold and italic.

```Markdown
**_em strong_**
```

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

### Displaying a Basic Alert in JavaScript

Source: https://github.com/erusev/parsedown/blob/master/test/data/xss_text_encoding.md

This snippet illustrates the fundamental use of the `alert()` function in JavaScript. When executed in a web browser, it will display a small pop-up dialog box with the specified message. It's commonly used for simple notifications or debugging.

```javascript
alert(1)
```

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

### HTML and PHP Mixed Code Block

Source: https://github.com/erusev/parsedown/blob/master/test/data/fenced_code_block.md

Example of a code block combining HTML and PHP, demonstrating embedded PHP within HTML and how Parsedown processes mixed content.

```html+php
<?php
echo "Hello World";
?>
<a href="http://auraphp.com" >Aura Project</a>
```

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

### Create Horizontal Rule in Markdown

Source: https://github.com/erusev/parsedown/blob/master/test/data/setext_header.md

Provides an example of creating a horizontal rule in Markdown using three or more hyphens. This element is used to visually separate content sections.

```Markdown
------------
```

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

### Markdown Single Column Table with Trailing Pipe

Source: https://github.com/erusev/parsedown/blob/master/test/data/simple_table.md

Demonstrates a single-column Markdown table where the header separator includes a trailing pipe (|). This syntax is often supported and does not invalidate the table.

```Markdown
header 1
-------|
cell 1.1
cell 2.1
```

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

### Convert Markdown Document to HTML with Parsedown

Source: https://github.com/erusev/parsedown/blob/master/README.md

This example shows how to instantiate the Parsedown class and use its `text()` method to convert a full Markdown string into its corresponding HTML representation. The output includes block-level HTML elements like paragraphs.

```php
$Parsedown = new Parsedown();

echo $Parsedown->text('Hello _Parsedown_!'); # prints: <p>Hello <em>Parsedown</em>!</p>
```

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

### Demonstrate JavaScript URI XSS in Markdown Links

Source: https://github.com/erusev/parsedown/blob/master/test/data/xss_bad_url.html

These snippets show various ways to inject JavaScript code into Markdown links using the 'javascript:' URI scheme. Variations include URL-encoded colons and commented-out slashes, which parsers might misinterpret, leading to Cross-Site Scripting (XSS) vulnerabilities.

```Markdown
[xss](javascript%3Aalert(1))
```

```Markdown
[xss](javascript%3A//alert(1))
```

```Markdown
[xss](javascript&colon;alert(1))
```

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

### Markdown Table with Left-Aligned Column

Source: https://github.com/erusev/parsedown/blob/master/test/data/simple_table.md

Illustrates a Markdown table where the first column is explicitly left-aligned using a colon (:) at the beginning of its header separator. Other columns remain default (usually left or center depending on parser).

```Markdown
header 1 | header 2
:------- | --------
cell 1.1 | cell 1.2
cell 2.1 | cell 2.2
```

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

### Demonstrate Data URI (HTML/JS) XSS in Markdown Links

Source: https://github.com/erusev/parsedown/blob/master/test/data/xss_bad_url.html

These snippets utilize 'data:' URIs to embed base64-encoded HTML content, including JavaScript, directly into Markdown links. This technique bypasses traditional URL filtering by containing the malicious payload within the URI itself, potentially leading to XSS.

```Markdown
[xss](data%3Atext/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg==)
```

```Markdown
[xss](data%3A//text/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg==)
```

```Markdown
[xss](data&colon;text/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg==)
```

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

### Markdown: Complex Strong and Emphasis Combination

Source: https://github.com/erusev/parsedown/blob/master/test/data/em_strong.html

Presents a complex Markdown string with initial bold text, followed by nested emphasis within bold, and then more bold text. The entire string is bold, with the middle part also italic.

```Markdown
**strong _em strong_ strong**
```

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

### Markdown: Nested Emphasis with Adjacent Strong

Source: https://github.com/erusev/parsedown/blob/master/test/data/em_strong.html

Shows a phrase where emphasis is nested within strong, followed by additional bold text outside the emphasis but still within the outer strong tag. The first part is bold and italic, the second part is only bold.

```Markdown
**_em strong_ strong**
```

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

### Markdown Table Syntax Not Parsed Due to Context

Source: https://github.com/erusev/parsedown/blob/master/test/data/simple_table.md

Highlights a scenario where valid Markdown table syntax is not parsed as a table. This occurs because the table structure immediately follows text without a blank line, making it part of the preceding paragraph rather than a distinct block element.

```Markdown
header 1 | header 2
-------- | --------
cell 1.1 | cell 1.2
cell 2.1 | cell 2.2
```

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

### PHP: Basic String Variable and Output

Source: https://github.com/erusev/parsedown/blob/master/test/data/tab-indented_code_block.md

This PHP snippet initializes a string variable `$message` with 'Hello World!' and then prints its content to the standard output using `echo`. It also demonstrates printing a second string directly after a blank line.

```php
<?php

$message = 'Hello World!';
echo $message;

echo "following a blank line";
```

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

### Create Single Character List Item in Markdown

Source: https://github.com/erusev/parsedown/blob/master/test/data/setext_header.md

Illustrates how a single hyphen can be interpreted as a list item in Markdown. This syntax is used to create unordered lists.

```Markdown
single character
-
```

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

### Define H1 Header in Markdown

Source: https://github.com/erusev/parsedown/blob/master/test/data/setext_header.md

Demonstrates the Markdown syntax for a top-level (H1) header using the 'equals sign' underline method. This is a common way to define the main title of a document.

```Markdown
h1
==
```

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

### PHP Code Block with Info String

Source: https://github.com/erusev/parsedown/blob/master/test/data/fenced_code_block.md

Demonstrates a PHP code block with an additional info string ('some-class') after the language identifier, a common feature in markdown extensions.

```php
<?php
echo "Hello World";
```

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

### Define H2 Header in Markdown

Source: https://github.com/erusev/parsedown/blob/master/test/data/setext_header.md

Shows the Markdown syntax for a second-level (H2) header using the 'hyphen' underline method. This is typically used for major sections within a document.

```Markdown
h2
--
```

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

### PHP Code Block with Language Identifier

Source: https://github.com/erusev/parsedown/blob/master/test/data/fenced_code_block.md

Illustrates a PHP code block explicitly marked with a language identifier, demonstrating standard markdown parsing.

```php
echo 'language identifier';
```

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

### Generic Tilde Fenced Code Block

Source: https://github.com/erusev/parsedown/blob/master/test/data/fenced_code_block.md

Shows a simple fenced code block using tildes as delimiters, without a specified language identifier.

```text
tilde
```

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

### Plain Text Code Block with Newlines

Source: https://github.com/erusev/parsedown/blob/master/test/data/fenced_code_block.md

A simple plain text code block demonstrating the preservation of multiple newlines within the block content.

```text
foo


bar
```

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

### Convert Inline Markdown to HTML with Parsedown

Source: https://github.com/erusev/parsedown/blob/master/README.md

This snippet illustrates how to parse only inline Markdown elements using Parsedown's `line()` method. It's useful for converting short phrases without generating block-level HTML tags, producing only inline HTML.

```php
echo $Parsedown->line('Hello _Parsedown_!'); # prints: Hello <em>Parsedown</em>!
```

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

### Markdown Code Block with Escaped Characters

Source: https://github.com/erusev/parsedown/blob/master/test/data/escaping.md

Demonstrates that content within a Markdown code block (typically indented by four spaces) is treated literally, and special characters are not interpreted as Markdown syntax for formatting.

```Markdown
    escaped \*emphasis\* in a code block
```

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

### Enable Safe Mode for Untrusted Markdown Input in Parsedown

Source: https://github.com/erusev/parsedown/blob/master/README.md

This code activates Parsedown's safe mode, which is crucial when processing untrusted user-generated Markdown. It helps mitigate XSS risks by escaping user-input within HTML and sanitizing scripting vectors introduced by Markdown syntax.

```php
$Parsedown->setSafeMode(true);
```

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

### C# Code Block with Special Character Identifier

Source: https://github.com/erusev/parsedown/blob/master/test/data/fenced_code_block.md

Demonstrates a C# code block where the language identifier includes a special character, showing Parsedown's handling of such identifiers.

```c#
echo 'language identifier with non words';
```

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

### Escape HTML Markup in Parsedown Output for Trusted Input

Source: https://github.com/erusev/parsedown/blob/master/README.md

This snippet configures Parsedown to escape all HTML markup present in the input, rendering it as plain text in the output. This method is suitable for trusted input where you want to display raw HTML literally, but it does not provide XSS protection for untrusted input.

```php
$Parsedown->setMarkupEscaped(true);
```

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

### Markdown Inline Code Span with Escaped Characters

Source: https://github.com/erusev/parsedown/blob/master/test/data/escaping.md

Illustrates how special characters like asterisks are preserved within an inline code span in Markdown, preventing them from being interpreted as emphasis markers by the parser.

```Markdown
`escaped \*emphasis\* in a code span`
```

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