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How to check an Array-value...

 
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andreas
Smarty Pro


Joined: 22 Apr 2003
Posts: 106
PostPosted: Wed May 14, 2003 3:04 pm    Post subject: How to check an Array-value... Reply with quote
Hi!

Smarty is and should not be as powerful as PHP itself, but now I have a problem:

In my php-script I do:

Code:
$tpl->assign('all', $db->getAll('SELECT...')); // PEAR::DB
$tpl->assign('users', $_SESSION['users']);
$tpl->display('lt_tabelle.tpl');


in my template-File:

Code:
{foreach from=$all item="row"}
    <tr>
      <td align="center" valign="top">&&
        <input type="checkbox">
      </td>
      <td>{$row->user_id}</td>
      <td>{$row->tel}</td>
      <td><a href="#">{$row->email}</a></td>
    </tr>
{/foreach}


That works fine, but I want to have the checkbox checked, if the user_id of a row is a value of $_SESSION['users'], which is something like: array(1,5,99...);

In my template I can access it by {$users}, how could I build this in? I must build in {if} into the <input> tag, but what would be the right if-expression?

Or how could I change the variables in PHP so I can use something like

Code:
{if $users.$row->user_id} checked{/if}


The problem is that I want to give back the data from database(all) as objects, so I cannot write in it anymore from PHP.

Any ideas?

regards
Andreas

Last edited by andreas on Wed May 05, 2010 10:33 pm; edited 1 time in total
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boots
Administrator


Joined: 16 Apr 2003
Posts: 5611
Location: Toronto, Canada
PostPosted: Wed May 14, 2003 4:00 pm    Post subject: Reply with quote
If I got you correctly, you can write a modifier to wrap PHP's in_array. Then use your modifier to check for values in a given array.
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andreas
Smarty Pro


Joined: 22 Apr 2003
Posts: 106
PostPosted: Wed May 14, 2003 4:20 pm    Post subject: Reply with quote
You think of something like:
Code:
$smarty->register_modifier("contains","in_array");


But I need 2 parameters for in_array(), how can I do this?

Would be nice if I could assign the array to the modifier in PHP, so that I can use it in my templates like:
Code:
{if $var|contains}


is this possible?

Thank you!
________
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Last edited by andreas on Fri Feb 04, 2011 9:00 am; edited 2 times in total
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boots
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Joined: 16 Apr 2003
Posts: 5611
Location: Toronto, Canada
PostPosted: Wed May 14, 2003 4:58 pm    Post subject: Reply with quote
yes: see the manual on plugin modifiers. For example, here's a super simple LINK modifier that accepts 4 parameters:

Code:
function smarty_modifier_link($title, $href='', $id='', $target='')
{
    if ( !empty($target) ) {
        $_id = (empty($id)) ? '' : 'id="'.$id.'" ';
        $__id = (empty($id)) ? '' : "#$id";
       return '<a '.$_id.'target="'.$target.'" href="'.$href.$__id.'">'.$title.'</a>';
    }
    if ( !empty($id) ) {
        $_id = (empty($id)) ? '' : 'id="'.$id.'" ';
        $__id = (empty($id)) ? '' : "#$id";
       return '<a '.$_id.'href="'.$href.$__id.'">'.$title.'</a>';
    }
    if ( !empty($href) ) {
       return '<a href="'.$href.'">'.$title.'</a>';
    }
   return '<a>'.$title.'</a>';
}


eg:
{"My Site"|link:"myreference.php":"myid":"_blank"}

I'd give you an example more specific to your task, but I'm in a rush at the moment and anyhow, it makes a good excercise--modifiers rock!
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messju
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Joined: 16 Apr 2003
Posts: 3336
Location: Oldenburg, Germany
PostPosted: Wed May 14, 2003 5:00 pm    Post subject: Reply with quote
{if $var|in_array:$array}... works
you don't even have to register a modifier for that.

if you want opposit order, you have to write a modifier to wrap it:
modifier.contains.php:
Code:

function smarty_modifier_contains($haystack, $needle) {
  return in_array($needle, $haystack);
}


but be careful to call it
{if $array|@contains:$var}...

(note the @!) without the @ the modifier isn't called for $array but for each element of $array, which is not what you want.

the order is a matter of taste. i think "contains" reads nicer than "in_array", but the "@" is not nice (and easily forgotten) and not necessary for "in_array"

HTH
messju
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andreas
Smarty Pro


Joined: 22 Apr 2003
Posts: 106
PostPosted: Wed May 14, 2003 5:33 pm    Post subject: Reply with quote
Thank you!

I tried some things before and it doesn't work as I expected, so I rewrote the DB-Reqest, now I do this:
Code:
while ($row = $result-&gt;fetchRow()) {
    if($users[$row['user_id']]) {
        $row[checked] = TRUE;
    }
    $data[] = $row;
}
$tpl-&gt;assign('data', $data);


and in smarty
Code:
{if $row.checked} checked{/if}


This looks better for me, I don't like using PHP-functions from smarty, this way it works fine, or what do you think about it?
________
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Last edited by andreas on Fri Feb 04, 2011 9:00 am; edited 2 times in total
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messju
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Joined: 16 Apr 2003
Posts: 3336
Location: Oldenburg, Germany
PostPosted: Wed May 14, 2003 6:38 pm    Post subject: Reply with quote
yes, that looks smartest! Smile let php be the workhorse and keep the template free from function-calls and stuff.
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