Reference - Parms functions - ucfirst

{echo 'HELLO' | lower | ucfirst}

{echo (mid('hello', 1, 2) | ucfirst)} {echo (php:max(1, 2, 3) | + 1)} {echo upper(('ab' | replace('a', 'x')))} {echo ('x' | left(2) | . '!')}

<?php

  // A callable the list allows is handed on as before, and a function name as an argument
  // that is no callable is only text.

  $padPhpFunctions = [ 'implode', 'array_map', 'strtoupper', 'ucfirst' ];

?>

[{echo php:implode(',', php:array_map('strtoupper', ['x', 'y']))}][{echo php:ucfirst('system')}][{echo php:implode(',', php:array_map(NULL, ['a']))}]

<?php

  $title = '';

?>

[{$title | ucfirst}]
[{echo $title | php:strtoupper}]
[{echo php:time() | gt 5 ? 'set' : 'unset'}]

<?php

  // Front page: names the five ideas the subsystem is built from, and describes the one the
  // concept= parameter asks for.
  //
  // concept arrives from the query string, so it is only used when it names one of them -
  // reading $concepts with an unknown key ended the request with a 500 instead of a page,
  // and so did concept[]=, which arrives as an array.

  $concepts ['sequences']  = 'Something that defines a Sequence list';
  $concepts ['stores']     = 'A stored sequence list';
  $concepts ['actions']    = 'An action executed on a Sequence list';
  $concepts ['plays']      = 'Execute a Sequence on a Sequence';
  $concepts ['resume']     = 'Resume on a stored Sequence';

  if ( ! isset ( $concept ) or ! is_string ( $concept ) or ! isset ( $concepts [$concept] ) )
    $concept = 'sequences';

  $title = 'Sequences';

  $conceptTitle = ucfirst ($concept ) . ' - ' . $concepts [$concept];

?>

{lines}
  {concepts}
    {if &concepts:key NE $concept}
      <a href="?index&go=index&concept={&concepts:key}">{&concepts:key | ucfirst}</a>
    @else@
      <b> {&concepts:key | ucfirst} </b>
    {/if}
    {notLast} | {/notLast}
  {/concepts}
{/lines}

<h2>{$conceptTitle}</h2>

{block}
  {page 'concepts/{$concept}', include}
{/block}

<?php

  // Listen: a sequence played as notes. Each of the first 32 terms becomes a note - the
  // term modulo 60, five octaves up from C2, the way the OEIS 'listen' button folds a term
  // into the keyboard - and the notes are written as a WAV file into the page itself
  // (seqFunWav in _lib/fun.php), so an <audio> element plays them without JavaScript.
  // Recamán's sequence, which jumps back and forth, is the famous one to listen to.
  //
  // type arrives from the query string and is used only when it names a type the gallery
  // draws.

  $choices = seqFunTypes ();

  if ( ! isset ( $type ) or ! is_string ( $type ) or ! in_array ( $type, $choices ) )
    $type = 'recaman';

  $terms = seqFunTerms ( $type, 32 );
  $oeis  = seqFunOeis ( $terms, $type );
  $oeis  = $oeis ? sprintf ( 'A%06d', $oeis ) : '';
  $list  = implode ( ', ', $terms );
  $notes = implode ( ' ', array_map ( 'seqFunNoteName', seqFunNotes ( $terms ) ) );
  $audio = seqFunWav ( $terms );

?>

<p>{choices}{notFirst} | {/notFirst}{if $choices eq $type}<b>{$choices}</b>@else@<a href="?listen&type={$choices}">{$choices}</a>{/if}{/choices}</p>

<h3>{$type | ucfirst}{if $oeis ne ''} - <a href="https://oeis.org/{$oeis}">{$oeis}</a>{/if}</h3>

{chart 'line', data='terms', title='{$type | ucfirst}, the first 32 terms', width=640, height=220}

<p><audio controls preload="none" src="{$audio}"></audio></p>

<p>Each term is a note: the term modulo 60, counted in semitones up from C2.</p>

<p><small>{$list}</small></p>

<p><small>{$notes}</small></p>