A

10 tags

{accordion} Items that open and close on a click, each a details element - no JavaScript. Widgets
{action} Runs one sequence action - reverse, sum, first and the rest - over a store, a range or a type, and iterates the result. Sequences
{ajax} Writes an empty div and a script that has the browser fetch another page into it after the page has loaded. Pages and execution
{array} Runs a SQL query on the application database and repeats its content once per row. Database
{assert} A condition a test run holds the page to; silent everywhere else. Debugging and errors
{asset} The address of a file of www/<app>/ with a version of its contents, safe behind a far-future cache header. Output control
{at} Looks a value up in a data set by a path of names and conditions - the @ notation as a tag. Variables and stores
{attrs} Writes HTML attributes from values - quoted and escaped, a true boolean attribute bare, a false one left out. Text and formatting
{auth} Renders its content when a user is logged in, with the user's row as its data, and its else half for a guest. Users and access
{avatar} Draws an initials avatar as inline SVG - the letters of a name in a circle coloured by a hash of it, no image needed. Pictures and media

B

5 tags

{barcode} Draws a barcode as inline SVG - EAN-13, EAN-8, UPC-A or Code 128, encoded on the server. Charts and codes
{block} A named region of a layout or wrapper - and a page's override of it. Layouts and components
{bool} Reduces its content or a value to TRUE or FALSE and keeps it under a name, for a later {name} to test. Variables and stores
{branch} Inside a {tree}: renders its content only when the current row has children, its @else@ part for a leaf. Loops and trees
{break} Leaves a loop at once: the rest of the current pass is dropped and no further row follows. Loops and trees

C

23 tags

{cache} Keeps a named section of the page rendered for a number of seconds - the fragment cache. Output control
{calendar} Writes a month as a calendar table with its events, or hands over its weeks and days as rows for markup of your own. Charts and codes
{can} Renders its content when the user may do something a gate decides, and its else half when not. Users and access
{cannot} Renders its content when the user may not do something a gate decides - can turned round. Users and access
{carousel} Slides in a row that scrolls and snaps sideways, with arrow links and dots - no JavaScript needed. Widgets
{case} Renders the one branch whose {when} matches a value, with an {else} for none. Conditions
{cease} Ends a loop gracefully: the current pass finishes, and no further row follows. Loops and trees
{chart} Draws a chart as inline SVG on the server - 46 kinds, from bars and lines to sankeys, maps of a hierarchy and org charts. Charts and codes
{check} Asks the application database whether a row exists, and renders its content only when one does. Database
{chess} A chess position from FEN as an SVG board, with marked squares and arrows. Games
{classes} Builds a class list from fixed names and names that are in only while their condition holds. Text and formatting
{close} Writes a literal closing brace that the template engine does not read as the end of a tag. Output control
{code} Runs its content as PAD source in a separate engine pass and outputs what that pass produced. Pages and execution
{collection} Reads a folder of Markdown files from _content/ and repeats its content once per file, the front matter as fields. Database
{content} Keeps a piece of template under a name instead of printing it, for a later {name} to render. Variables and stores
{continue} Skips the rest of the current pass of a loop and goes on with its next row. Loops and trees
{copy} A text in a code block with a button that copies it to the clipboard. Widgets
{count} Renders its content only when a named data set or page array holds at least one element. Variables and stores
{countdown} The time left until a moment, in words inside a time element - ticking every second in the browser when asked. Text and formatting
{country} Writes a country's flag from its ISO 3166 code or English name, optionally with the name beside it. Pictures and media
{crossword} A crossword made from a list of words: a numbered SVG grid with the Across and Down clues. Games
{csrf} The hidden form field holding the CSRF token of the visitor's session, or the bare token. Forms and security
{curl} Fetches a URL and answers the body of the response, optionally kept in a cache for a number of seconds. Network and mail

D

9 tags

{data} Turns its content - JSON, XML, YAML, CSV, a list or a range - into a named data set for a later tag to iterate. Variables and stores
{datatable} Rows as a complete HTML table - formatted numbers, a totals row, sorting and paging on the server. Widgets
{debug} Shows values as a collapsible tree in the page, for a local request only, while rendering goes on. Debugging and errors
{decrement} Takes one off a variable, starting it at -1 when it does not exist yet. Variables and stores
{define} Writes a custom tag in the template itself - what a _tags/name.pad file is, without the file. Layouts and components
{diagram} Draws a flowchart or a sequence diagram from Mermaid-style lines of text, laid out on the server as inline SVG. Charts and codes
{diff} Shows what changed between two texts - word by word in the flow of the text, or line by line in one column or side by side. Text and formatting
{dir} Lists the names in a directory, one occurrence each - the plain version of files. Files
{dump} Stops the request and shows the debug dump of the engine's state at that point. Debugging and errors

E

8 tags

{echo} Evaluates an expression and prints the result - the general output tag, and the one to put in front of a pipe. Output control
{emoji} An emoji by its GitHub or Slack shortcode, as a labelled image a screen reader names. Text and formatting
{error} Raises a PAD error from the template, handled as the configured error action says. Debugging and errors
{exception} Throws a real PHP exception from the template, to exercise the error handling. Debugging and errors
{excerpt} Cuts a long text to whole words with an ellipsis, centred on the first match of search words, every match marked. Text and formatting
{exists} Renders its content when a file or directory is there, its else half when not. Files
{exit} Ends the request at once, with an empty body - the PAD way to stop instead of PHP's exit. Debugging and errors
{extends} Frames the page with a layout instead of its directories' wrappers. Layouts and components

F

11 tags

{false} The constant FALSE: its content is skipped and its @else@ part renders instead. Conditions
{feature} Renders its content while a feature flag is on for this visitor, and its else half while it is off. Users and access
{field} Runs a SQL query on the application database and prints the single value it answers. Database
{file} Writes its rendered content to a file under DATA/ instead of to the page. Files
{files} Scans a directory and iterates its entries, with path, file, ext, item and dir for each. Files
{flag} Replaces every value of a sequence with 1 or 0: whether it belongs to a sequence type. Sequences
{flash} The flash messages of this request - set with padFlash on the page before - one occurrence each. Forms and security
{flush} Sends the page rendered so far to the browser at once, so it can load the stylesheets while a slow part below renders. Output control
{foo} A built-in demo tag that answers a fixed line, there to show how the type prefixes resolve a name. Output control
{form} A form that posts back to the page, carrying the session's CSRF token and its own name, its fields refilling when it came back. Forms and security
{fragment} A named part of the page that a request can ask for alone - for htmx and ajax swaps. Layouts and components

G

3 tags

{get} Fetches another page of the application over HTTP, as a second request, and inserts its output. Pages and execution
{gravatar} Writes the Gravatar picture of an e-mail address as an img - only a hash of the address leaves the page - or a local avatar instead. Pictures and media
{guest} Renders its content when nobody is logged in, and its else half for a user. Users and access

H

1 tag

{highlight} Colours source code on the server - PAD, PHP, HTML, CSS, JavaScript, JSON, YAML, SQL or shell - with optional line numbers and marked lines. Text and formatting

I

8 tags

{icon} Writes an interface icon from PAD's own set of 79 as inline SVG, drawn in the colour of the text around it. Pictures and media
{identicon} Draws a GitHub-style identicon as inline SVG - a symmetric 5 by 5 pattern and a colour from a hash of the value. Pictures and media
{if} Renders its content only when a condition holds, with elseif and else branches. Conditions
{ifchanged} Renders its content when a value differs from the previous row of the loop around it - a heading per group. Conditions
{ignore} Keeps PAD from reading the braces in its content as tags - for inline JavaScript, CSS, JSON and code samples. Output control
{img} Writes a picture of the application's www directory as a thumbnail of the size the page shows it at, resized once with GD. Pictures and media
{increment} Adds one to a variable, starting it at 1 when it does not exist yet. Variables and stores
{input} A form field with its label that refills from what its form sent and shows the error validation found for it. Forms and security

J

1 tag

{jsonview} A JSON value or a PHP array as a tree that folds open and shut, coloured by type. Widgets

K

1 tag

{keep} Keeps only the values of a sequence that belong to a sequence type. Sequences

L

2 tags

{live} A region of the page that re-renders on the server when something in it is clicked, submitted or changed, and swaps itself in. Pages and execution
{lorem} Placeholder text - Lorem ipsum and Latin words - in words, sentences or paragraphs, the same text for the same seed. Text and formatting

M

7 tags

{macro} A template function: declared parameters, given in order or by name, read as fields inside its body. Layouts and components
{mail} Renders a template, or its own content, to an e-mail with an HTML and a text part, and sends it. Network and mail
{make} Replaces every value of a sequence with what a sequence type makes of it. Sequences
{map} Draws a choropleth map as inline SVG - every country coloured by a value of its row - of the world or one of its regions. Charts and codes
{markdown} Renders its content, or the value of its parameter, as Markdown and writes the HTML. Text and formatting
{meta} The page's metadata - a title, a layout, a cache time or any value - read while the page is assembled. Layouts and components
{modal} A dialog over the page with the button that opens it - works with and without JavaScript. Widgets

N

3 tags

{nocache} Marks a part of a cached page or {cache} section that renders again on every request, the hit included. Output control
{nonce} This request's Content-Security-Policy nonce, for a script or style the policy lets run. Forms and security
{null} The constant NULL: its content is dropped, the @else@ part too, and a null= option fires. Conditions

O

2 tags

{open} Writes a literal opening brace that the template engine does not read as the start of a tag. Output control
{output} Switches how the running request answers - a web page, the console, a file, a download, JSON or CSV. Output control

P

11 tags

{pad} A tag with no behaviour of its own: its content renders once, or per row with data=, carrying the generic options. Pages and execution
{page} Renders another page of the application - its PHP and its template - in place of the tag. Pages and execution
{pager} Page links for a tag written with the page option: first and last, a window round the current page, previous and next. Navigation
{parent} Inside an overriding block: the content of the block it overrides. Layouts and components
{parms} Declares the parameters of a custom tag, with defaults, at the top of its template. Layouts and components
{pdf} Sends what its content renders as a PDF instead of the page - a writer in plain PHP, the standard fonts, no library. Pictures and media
{placeholder} Draws a grey image placeholder as inline SVG - crossing lines and the size or a text in the middle. Pictures and media
{poll} A vote among a few answers, once per visitor, then the results as bars with percentages. Widgets
{progress} Writes an accessible progress bar - the native progress element, styled, with its label and percentage - or a row of step dots. Pictures and media
{pull} Iterates a stored sequence, optionally through plays and actions. Sequences
{push} Renders its content and adds it to a named stack, for a stack tag elsewhere in the page to print. Layouts and components

Q

1 tag

{qr} Draws a QR code as inline SVG, encoded on the server - no image library, no remote service. Charts and codes

R

8 tags

{rating} Draws a score as stars or hearts in inline SVG - whole ones filled, a part of one clipped - and says it in words. Pictures and media
{reactData} Writes the mount point of a React component, its data from a provider in _providers/ as JSON in an attribute. Output control
{record} Runs a SQL query on the application database and renders its content with the first row's columns as fields. Database
{recurse} Inside a {tree}: renders the tree's body once more for the children of the current row. Loops and trees
{redirect} Sends the browser to another page or address with a 302 and ends the request. Navigation
{remove} Removes the values of a sequence that belong to a sequence type - the inverse of keep. Sequences
{restart} Abandons the page being built and renders another page in its place, in the same request. Pages and execution
{resume} Transforms the sequence pushed last, in place, through an action or a play. Sequences

S

12 tags

{sandbox} Runs its content as PAD source in an isolated pass that cannot see or leave behind anything of the page. Pages and execution
{sequence} Generates a range, a list or one of 80 mathematical sequences, and iterates its values. Sequences
{set} Assigns one or more variables, as globals that outlive the level the tag stands in. Variables and stores
{shadow} The shadow root of a custom element, rendered on the server as declarative shadow DOM. Layouts and components
{sitemap} Lists the pages of the application, read from the file tree, as rows with page, url and lastmod. Navigation
{slot} A named place in a custom tag's template - and the fill a caller gives it. Layouts and components
{source} Shows the files behind a page as tabs, each coloured as highlight colours it - the code shown is the code that runs. Text and formatting
{spaceless} Takes out the whitespace between HTML tags, and at both ends of the content. Output control
{sparkline} Draws a word-sized line chart as inline SVG - no axes, the last point marked - to stand in a sentence or a table cell. Charts and codes
{stack} Prints everything pushed to a named stack, from above or below it in the page. Layouts and components
{sudoku} A sudoku as a table, the givens bold - and with solve, solved on the server. Games
{switch} Answers the next value of a rotating list on every call - striped rows without a counter. Conditions

T

11 tags

{tab} One item of a tabs, accordion or carousel: its label and its content, handed to that owner. Widgets
{tabs} Panels behind a row of tabs, switched by radio buttons and CSS - no JavaScript. Widgets
{textarea} A text area with its label that refills from what its form sent and shows the error validation found for it. Forms and security
{tidy} Rewrites the HTML it wraps as tidied, indented markup through PHP's tidy extension. Output control
{timeago} How long ago a moment was, in words, inside a time element that keeps the exact moment as its datetime and title. Text and formatting
{timeline} Draws events on a time axis as inline SVG - cards above and below the axis, spans as bars, or one under the other. Charts and codes
{toc} A table of contents of the page from its own rendered headings, nested and linked - filled in once the page has rendered. Text and formatting
{trace} Switches the execution trace on for just the part of the page it wraps. Debugging and errors
{trans} Writes the text a key has in the _lang/ catalog of the request's locale, with plural forms and substitutions. Output control
{tree} Renders a tree of rows: its body for every row, and {recurse} renders it again for the row's children. Loops and trees
{true} The constant TRUE: its content renders once, as a level of its own. Conditions

U

1 tag

{until} Renders its content again and again until a condition becomes true. Loops and trees

V

3 tags

{validator} The browser's checker of the validation rules as one inline script, for a form a component draws. Forms and security
{video} Shows a YouTube or Vimeo video as its poster with a play button, loading the player only when pressed - or a video file as a video element. Pictures and media
{vite} Links the scripts and stylesheets of a Vite build by the name of their source - or the dev server while it runs. Output control

W

1 tag

{while} Renders its content again and again for as long as a condition holds. Loops and trees

Tags by name

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W