PHPTALES if, eq

myphptales.php

function phptal_tales_if( $src, $nothrow )
{
    list($if_part, $right) = explode('?', $src, 3);
    if (strpos($right,'|')) {
        list($then_part, $else_part) = explode('|', $right, 2);
    } else {
        $then_part = $right;
        $else_part = 'null';
    }
    return '('.phptal_tales($if_part, $nothrow).') ? '.phptal_tales($then_part, $nothrow).' : '.phptal_tales($else_part, $nothrow).'';
}

function phptal_tales_eq( $src, $nothrow )
{
    list($left, $right) = explode(' ', $src, 2);
    return '('.phptal_tales($left, $nothrow).' == '.phptal_tales($right, $nothrow).' )';
}

usage:

controller

$people = array();
$people[] = (object)array("name"=>"foo", "phone"=>"01-344-121-021");
$people[] = (object)array("name"=>"bar", "phone"=>"05-999-165-541");
$people[] = (object)array("name"=>"baz", "phone"=>"01-389-321-024");
$people[] = (object)array("name"=>"quz", "phone"=>"05-321-378-654");
$template->people = $people;
echo $template->execute();

template

<span tal:replace="if: eq:people/0/name people/0/name ? string:then " >default</span> :then
<br/>
<span tal:replace="if: eq:people/0/name people/1/name ? string:then " >default</span>  :null
<br/>
<span tal:replace="if: eq:people/0/name people/0/name ? string:then | string:else" />   :then
<br/>
<span tal:content="if: eq:people/0/name people/1/name ? string:then | string:else"/>   :else
<br/>
<span tal:replace="if: exists:people/1 ? string: people/1 exists | string: people/1 not exists " >default</span>  :people/1 exists
<br/>
<span tal:replace="if: exists:people/100 ? string: people/100 exists | string: people/100 not exists " >default</span> :people/100 not exists