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Array_key_exists analogue for Smarty...

 
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amagrude
Smarty n00b


Joined: 02 Dec 2004
Posts: 2
PostPosted: Wed Dec 08, 2004 3:19 am    Post subject: Array_key_exists analogue for Smarty... Reply with quote
To prevent the 'index doesn't exist' problem when dealing with arrays, I took a code snippet I noticed in the Features Request area and banged into the shape that I needed for my project.

This modifier let's you do handy things list this:

Code:

{if 'email'|isset:$ErrorList}
    {$ErrorList.email}
{/if}


which I use to conditionally intersperse validation errors amongst input fields on forms. Before this approach, I was building corresponding true/false arrays which were guaranteed to have all indexes set and took the place of the isset modifier above. While that worked, that wasn't pleasing...

Plugin code:
Code:

<?php
/*
 * Smarty plugin
 * -------------------------------------------------------------
 * File:     modifier.isset.php
 * Type:     modifier
 * Name:     isset
 * Purpose:  array_key_exists analogue for smarty
 * -------------------------------------------------------------
 *
 * Sample Usage:    {if ('index'|isset:$Array)}
 *
 * QUOTES ARE NECESSARY
 */

function smarty_modifier_isset($Index, $Array)
{
    return array_key_exists($Index, $Array);
}
?>


As an interesting exercise, I thought about writing one which would work for the general case of any PHP type, but I can't seem to figure out a syntax other than:

{if (''|isset:$Var)}

which isn't the cleanest syntax. Is there another way to accomplish this?

Andrew
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boots
Administrator


Joined: 16 Apr 2003
Posts: 5611
Location: Toronto, Canada
PostPosted: Wed Dec 08, 2004 4:03 am    Post subject: Reply with quote
I guess easier is for you to decide Smile Here are some ideas--

Code:
{if array_key_exists('email', $ErrorList)}


You can use PHP functions in if statements -- they also work as modifiers when security is off (default):

Code:
{if 'email'|array_key_exists:$ErrorList)}


Another thing you can do is set $smarty->error_reporting = E_ALL & ~E_NOTICE; (see: http://smarty.php.net/manual/en/variable.error.reporting.php ) then you can use the much simpler:

Code:
{if $ErrorList.email}
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