PHP：在行内添加If条件

    if($i==6) {
    $result .= '<a style="display:none" class="fancybox" data-fancybox-group="gallery" href="'.$value['images']['standard_resolution']['url'].'"></a> '.$caption.PHP_EOL;;}
    else {
    $result .= "\t".'<a class="fancybox" data-fancybox-group="gallery" href="'.$value['images']['standard_resolution']['url'].'"><img id="thumb'.++$i.'" src="'.$value['images']['low_resolution']['url'].'" alt="'.$value['caption']['text'].'" width="'.$width.'" height="'.$height.'" /></a> '.$caption.PHP_EOL;}

This means: for all the items greater than 6 $result is display:none and blahblah, for all the others $result is images with caption.

What I'd like to add is: if counter is EQUAL to 4, print the "else" $result with the ONLY change that instead of src="'.$value['images']['low_resolution']['url'].'", it would be src="'.$value['images']['thumb_resolution']['url'].'"

I think that this would work, but I'm looking for a cooler, one-liner way :D

    if($i==6) {
    $result .= '<a style="display:none" class="fancybox" data-fancybox-group="gallery" href="'.$value['images']['standard_resolution']['url'].'"></a> '.$caption.PHP_EOL;;}
    elseif($i===4) {
    $result .= "\t".'<a class="fancybox" data-fancybox-group="gallery" href="'.$value['images']['standard_resolution']['url'].'"><img id="thumb'.++$i.'" src="'.$value['images']['thumb_resolution']['url'].'" alt="'.$value['caption']['text'].'" width="'.$width.'" height="'.$height.'" /></a> '.$caption.PHP_EOL;}
    else {
    $result .= "\t".'<a class="fancybox" data-fancybox-group="gallery" href="'.$value['images']['standard_resolution']['url'].'"><img id="thumb'.++$i.'" src="'.$value['images']['low_resolution']['url'].'" alt="'.$value['caption']['text'].'" width="'.$width.'" height="'.$height.'" /></a> '.$caption.PHP_EOL;}

Look up the conditional operator, or ternary operator. It is used like this:

$check = true;
$var = $check ? 5 : 3;

The conditional operator checks the value of the expression before the ? and outputs either the value before the : if the expression is true or the value after the ':' if it is false. So the line above sets $var to 5 because $check is true. You could also have done this:

$check = 2354;
$var = ($check < 40) ? 5 : 3;

That would have given you the opposite result, $var would have been set to 3, because $check did not meet the condition $check < 40. Think of it like a function which outputs one of two possible values based on the truth value of a given expression. You can embed that directly into the result .= as:

($i === 4) ? $value['images']['low_resolution']['url'] : $value['images']['thumb_resolution']['url'];

For more information about the conditional operator, you can look at the PHP documentation page about it here. Note that the part about the conditional operator is a little way down the page.

Use the ternary operator of php. The simple syntax is

Condition ? (if-equivalent-statement) : (else-equivalent-statement)

However, when this condition is used inside another statement, you should enclose it within parentheses like:

(Condition ? (if-equivalent-statement) : (else-equivalent-statement))

So, the code should be like this:

if($i==6) {
    $result .= '<a style="display:none" class="fancybox" data-fancybox-group="gallery" href="'.$value['images']['standard_resolution']['url'].'"></a> '.$caption.PHP_EOL;;}
else {
//I've broken down the line to make it easier to read

    $result .= "\t".'<a class="fancybox" data-fancybox-group="gallery" href="'.$value['images']['standard_resolution']['url'].'"><img id="thumb'.++$i.'" src="'.

            (($i==4) ? $value['images']['thumb_resolution']['url'] : $value['images']['low_resolution']['url'])

            .'" alt="'.$value['caption']['text'].'" width="'.$width.'" height="'.$height.'" /></a> '.$caption.PHP_EOL;

}

What you might be thinking is a Ternary operators but it doesn't "really" support elseif and can be hard to read.

Why not try a switch for more cooler but it's not one liner. :)

 switch ($i){
   case "6": 
       $result .= '<a style="display:none" class="fancybox" data-fancybox-group="gallery" href="'.$value['images']['standard_resolution']['url'].'"></a> '.$caption.PHP_EOL;
       break;
   case "4": 
       $result .= "\t".'<a class="fancybox" data-fancybox-group="gallery" href="'.$value['images']['standard_resolution']['url'].'"><img id="thumb'.++$i.'" src="'.$value['images']['thumb_resolution']['url'].'" alt="'.$value['caption']['text'].'" width="'.$width.'" height="'.$height.'" /></a> '.$caption.PHP_EOL;
       break;
   default:  
       $result .= "\t".'<a class="fancybox" data-fancybox-group="gallery" href="'.$value['images']['standard_resolution']['url'].'"><img id="thumb'.++$i.'" src="'.$value['images']['low_resolution']['url'].'" alt="'.$value['caption']['text'].'" width="'.$width.'" height="'.$height.'" /></a> '.$caption.PHP_EOL;
       break;
 }