PHP Last Array Key Issue

I have this simple code for pasting images from a directory, I've sorted them into an array but the problem I can't seem to work out is how to get the last array to be different.

This is my code so far:

foreach($images as $image){
echo("{image : '$image'}, ");
}

I'm looking to keep print the single items in the 开发者_StackOverflow社区array but on the last one I'd like to not have the comma.

Any help would be great,

Thanks!

---

Simple.

function doit($image) {
    return "{image: '$image'}"
}

$images = array_map('doit',$images);
$images = implode(', ',$images);

---

echo "{image : '".implode("'}, {image : '",$images)."'}";

---

Try:

<?php
$buffer = array();
foreach($images as $image){
    $buffer[] = "{image : '$image'}";
}
echo implode(', ', $buffer);

---

Try using the key and the length of the array:

$arrLength = count($images);
foreach($images as $key=>$image){
   echo("{image : '$image'}");
   if($key < $arrLength - 1){  echo ", "; }
}

Or use an array_map:

function make_array($n)
{
    return "{image: '$n'}"
}

$map = array_map("make_array", $images);
$new_array = implode(', ', $map);

---

You could do this attractively with a do..while loop:

$image = current($images);
do {
    echo "{image : '$image'}";
} while (($image = next($images) && (print " ,"));

Note that you have to use print not echo there, as echo does not behave as a function.

The second part of the conditional only executes if the first part passes, so " ," will only be printed if another image exists.

---

If there is the possibility (as in, even the vaguest possibility) that your array may contain values that aren't non-empty strings, you'll need to be more verbose:

} while (
    (false !== ($image = next($images)) && 
    (print " ,")
);

I'm not convinced this is very readable, however, even split over multiple lines, so if this is the case I'd go for one of the other approaches.

---

Either use an if statement and check if it's the last and echo accordingly, or concatenate without echoing, trim the result after it's generated, and echo.

---

You could do if and else statements, where if its the last image print without comma else if it isn't print with comma.

---

$last = array_pop(array_keys($images));

foreach($images as $key => $image) {
   if ($key == $last) {
      ... last image ,don't output comma
   }
}