Sequences - Xref - Make - eval

<?php

  // A value spliced into the quoted expression of where= or eval= is a string of it also when
  // a string of the other quote stands before it - '"': the quotes were counted, the odd one
  // made the value seem to stand in a string already, and it went in bare - the request value
  // 1 or php:gettype() eq 3 became part of the condition, true for every row, and of the
  // eval expression.

  $q  = '1 or php:gettype() eq 3';
  $g  = 'php:gettype()';
  $xs = [ [ 'n' => 1, 's' => 'a' ], [ 'n' => 3, 's' => 'b' ] ];

?>

W[{xs where='$s ne \'"\' and $n eq {$q}'}{$n} {/xs}] E[{sequence '1..2', eval='@ . \'-\' . {$q}'}{$sequence} {/sequence}] F[{sequence '1..2', eval='@ . \'"\' . {$g}'}{$sequence}{/sequence}]

<?php

  $padSeqMaxSeconds = 0.01;

?>

{sequence '1..20000', push='s'/}[{pull:s make, eval='@*2', count}{if $sequence lt 20000}cut{else}whole{/if}{/pull:s}][{sequence '1..20000', count}{$sequence}{/sequence}]

{sequence '1..4', add=10, push='a'/}[{pull:a eval='@ + php:count(sequence:shift("a")) * 0'}{$sequence}:{$add} {/pull:a}|{pull:a}{$sequence} {/pull:a}]{sequence '1..4', add=10, push='a'/}[{pull:a first=4, eval='@ + php:count(sequence:pop("a")) * 0'}{$sequence}:{$add} {/pull:a}]{sequence '1..4', add=10, push='a'/}[{pull:a shift=1, eval='@ + php:count(sequence:shift("a")) * 0'}{$sequence}:{$add} {/pull:a}|{pull:a}{$sequence}:{$add} {/pull:a}]

<?php

  // A value spliced into the quoted expression of the eval sequence is a string of it in every
  // spelling - {eval '...'}, {sequence:eval '...'}, make='eval|...', sequence:eval(2, '...') -
  // as in eval='...': only eval= quoted it, and in the others the value became part of the
  // expression and called the function it named.

  $q = 'php:gettype()';

?>

e[{eval '@ . {$q}', rows=2}{$eval} {/eval}] s[{sequence:eval '@ . {$q}', rows=2}{$eval} {/sequence:eval}] m[{sequence '1..2', make='eval|@ . {$q}'}{$sequence} {/sequence}] c[{echo sequence:eval(2, '@ . {$q}')}]

[{sequence '1..3', eval='php:count(sequence:trim([1,2,3,4,5,6]))'}{$sequence} {/sequence}][{sequence '1..3', trim, right=1, eval='php:count(sequence:trim([1,2,3,4,5,6]))'}{$sequence} {/sequence}][{sequence '1..3', randomize=3, duplicates, eval='php:count(sequence:randomize([1,2,3], 5))'}{$sequence} {/sequence}][{sequence '1..6', trim, right=2}{$sequence} {/sequence}]

[{sequence '1..3', append=[9, 8], eval='php:count(sequence:sort([1,2])) + @'}{$sequence} {/sequence}][{sequence '1..3', intersection=[3, 4], eval='php:count(sequence:sum([1,2])) + @'}{$sequence} {/sequence}][{sequence '1..3', append=[9, 8], eval='@ + 2'}{$sequence} {/sequence}]

<?php

  // The eval sequence refuses an expression only for a spliced value that could call code or
  // read a variable - a (, a $ or a : in it: a - or a * 2 printed in a tag's parameters
  // elsewhere on the page, and a {define} written into the expression, made eval='@ - 1',
  // eval='@ * 2' and eval='@ {twice}' refusals.

  $op   = '* 2';
  $dash = '-';

?>

op=[{echo '{$op}'}] result=[{sequence '1..3', eval='@ * 2'}{$sequence} {/sequence}] a=[{echo '{$dash}'}] b=[{sequence '5..3', eval='@ - 1'}{$sequence} {/sequence}] {define 'twice'}* 2{/define}c=[{sequence '1..3', eval='@ {twice}'}{$sequence} {/sequence}]

<?php

  // eval= written by the template runs; a value spliced into its quotes is a string of the
  // expression, never part of it - it called the function the value named.

  $q = 'php:gettype()';

?>

a[{sequence '1..3', eval='@ * 2'}{$sequence} {/sequence}] b[{sequence '1..3', make='eval|@ * 10'}{$sequence} {/sequence}] c[{sequence '1..2', eval='@ . {$q}'}{$sequence} {/sequence}]

[{sequence 5, eval='sequence:square(@)'}{$sequence} {/sequence}][{sequence 3}{$sequence}:{echo sequence:square(2)}:{$sequence} {/sequence}]

[{sequence '1..5', push='s'}{/sequence}{resume add=sequence:prime(3)}{pull:s}{$s} {/pull:s}][{sequence '1..3', push='t'}{/sequence}{resume eval='sequence:square(@)'}{pull:t}{$t} {/pull:t}][{resume add=sequence:fibonacci(6)}{pull:t}{$t} {/pull:t}]

[{sequence '0..6', flag, eval='@*2'}{$sequence}{/sequence}][{sequence '0..6', keep, eval='@ * 3'}{$sequence} {/sequence}][{sequence '1..5', make, eval='@*2', keep, eval='@*4'}{$sequence} {/sequence}]