[RESOLVED] Do once in a loop

**ehime** · 09-09-2009, 12:11 PM

I'm using a WHILE loop right now, and on the first iteration I want to
echo out some extra content. Pretty much just an extra LI tag, is there
a way to do this other than what I'm doing here?

PHP Code:


                    <?php 
                        function xV() {
                        GLOBAL $video, $root;
                        
                        # VAR List
                        $swfobj     =     $root.'swfobject/';
                        $options     =     'options={counterType:\'skip\',continuous:true,animSequence:\'sync\'};width=640;height=498;';
                        $string     =     '<a href="'.$swfobj.$video[1].$i.'_controller.swf?'.$video[1].$i.'.flv" rel="shadowbox['
                                        .$video[1].'];'.$options.'" title="'.$video[2].'"></a>';

                            isset( $video['starter'] ) ? $i = $starter : $i = 1;
                            $i = str_pad( $i, 2, "0", STR_PAD_LEFT );
                            
                            # Once with LI tags
                            echo    "\n"."<li style='display:block;'>$string</li>";

                            # The rest in blank LI tags
                            echo    "\n".'<li style="display:none;">';
                            
                                $i = $i - 1; $a = 0; 
                                while ( $i <= $a ): $t = str_pad( $i, 2, "0", STR_PAD_LEFT );

                                    echo     "\n".$string; 
                                    $i++;

                                endwhile;
                                
                            echo    "\n".'</li>';
                        }
                    ?>
                  
                  
<? # Stinger RGB ?><? $video = array("starter" => "0", 0 => '3', 1 => 'stingerrgb', 2 => 'Stinger RGB'); xV(); ?>

So. What's going on here?
The first iteration is enclosed in its own LI tags with display set to BLOCK.
The rest of the iterations are enclosed in a single LI tag with display set
to NONE. This effectively hides them from view, but loads them for my
shadowbox viewer.

Note:
Code has just been written, and might be invalid.

Here's \'Roughly\' what the end output should look like.

HTML Code:

<li><a href="http://omnisistem.com/swfobject/stingerrgb00_controller.swf?stingerrgb00.flv" rel="shadowbox[stingerrgb];options={counterType:'skip',continuous:true,animSequence:'sync'};width=640;height=498;" title="Stinger RGB">Stinger RGB</a></li>
<li style="display:none;">
	<a href="http://omnisistem.com/swfobject/stingerrgb01_controller.swf?stingerrgb01.flv" rel="shadowbox[stingerrgb];options={counterType:'skip',continuous:true,animSequence:'sync'};width=640;height=498;" title="Stinger RGB"></a> 
	<a href="http://omnisistem.com/swfobject/stingerrgb02_controller.swf?stingerrgb02.flv" rel="shadowbox[stingerrgb];options={counterType:'skip',continuous:true,animSequence:'sync'};width=640;height=498;" title="Stinger RGB"></a> 
	<a href="http://omnisistem.com/swfobject/stingerrgb03_controller.swf?stingerrgb03.flv" rel="shadowbox[stingerrgb];options={counterType:'skip',continuous:true,animSequence:'sync'};width=640;height=498;" title="Stinger RGB"></a>
</li>

**ehime** · 09-09-2009, 12:37 PM

Looks like my isset isn't working, other than that though....

**SyCo** · 09-09-2009, 01:50 PM

You could do it a few ways. Here's one example using isset() and unset();

PHP Code:


$firsttime=1;
for($i=0;$i<3;$i++){
    if(isset($firsttime)){
        echo 'first time only ';
        unset($firsttime);
    }else{
        echo '2nd onwards ';
    }
}

**ehime** · 09-09-2009, 02:47 PM

Don't use for loops alot but that was what I was thinking (sort of) before I made this while loop. So (technically speaking) it would look something like this?

PHP Code:


 function xV() {
 GLOBAL $video, $root;
 
        # Prime Loop
        $i     =     isset( $video['starter'] ) ? $starter : 1;
        $i     =     str_pad( $i, 2, "0", STR_PAD_LEFT );
        $a     =     $video[0] - 1;
        $b    =    1;

        # VAR List
        $swfobj     =     $root.'swfobject/';
        $options     =     'options={counterType:\'skip\',continuous:true,animSequence:\'sync\'};width=640;height=498;';
        $string     =     "\t".'<a href="'.$swfobj.$video[1].$i.'_controller.swf?'.$video[1].$i.'.flv" rel="shadowbox['
                        .$video[1].'];'.$options.'" title="'.$video[2].'">'.$video[2].'</a>';
        
        for( $i = $i; $i < $a; $i++ ){
            if(isset($b)){
                echo    "\n"."<li style='display:block'>$string</li>";
                unset($b);

            } else {
                echo     "\t".'<a href="'.$swfobj.$video[1].$i.'_controller.swf?'.$video[1].$i.'.flv"'. 
                        'rel="shadowbox['.$video[1].'];'.$options.'" title="'.$video[2].'">'.$video[2].'</a>';
        }
    } 
}

**SyCo** · 09-09-2009, 02:56 PM

looks reasonable to me.

**ehime** · 09-09-2009, 03:02 PM

This worked here. Looks like about the same amount of code but *shrugs
Anything you see I can tighten up, or cut corners on SyCo?

PHP Code:


 function xV() {
 GLOBAL $video, $root;
 
        # Prime Loop
        $i     =     isset( $video['starter'] ) ? $starter : 1;
        $i     =     str_pad( $i, 2, "0", STR_PAD_LEFT );
        $a     =     $video[0];
        $b    =    1;

        # VAR List
        $swfobj     =     $root.'swfobject/';
        $options     =     'options={counterType:\'skip\',continuous:true,animSequence:\'sync\'};width=640;height=498;';
        $string     =     "\t".'<a href="'.$swfobj.$video[1].$i.'_controller.swf?'.$video[1].$i.'.flv" rel="shadowbox['
                        .$video[1].'];'.$options.'" title="'.$video[2].'">'.$video[2].'</a>';
        
        for( $i = $i; $i < $a; $i++ ){
            if(isset($b)){
                echo    "\n"."<li style='display:block'>$string</li>";
                echo    "\n".'<li style="display:none;">';
                unset($b);

            } else {     $i    =    str_pad( $i, 2, "0", STR_PAD_LEFT );
            
        echo     "\n\t"."$string";
                }
            } 
        echo    "\n".'</li>';
}

**SyCo** · 09-09-2009, 03:22 PM

Just watch you variable names. Single letters get cryptic to anyone else and you in six months. $i is usually is just the iteration. $i=$something_else is clearer.

If you need an <li>blah</li> on each iteration then it's like this.

PHP Code:


for( $i = $i; $i < $a; $i++ ){
    if(isset($b)){
        echo    "\n"."<li style='display:block'>$string</li>";
        unset($b);
    } else {     
        $i    =    str_pad( $i, 2, "0", STR_PAD_LEFT );// your counter will get rewritten here. might give unpredictable results
        echo     "\n".'<li style="display:none;">'."\n\t"."$string"."\n".'</li>';
    }
}