removing a "," from the last element in a foreach loop? - php

Question

i am trying (like hell..) to remove ',' from the last element in a foreach loop.
tried several counter methods, but not really successfully.
[<?php
function fetchData($url){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 20);
$result = curl_exec($ch);
curl_close($ch);
return $result;
}
$result = fetchData("https://api.instagram.com/v1/users/XXXXXXX/media/recent/?access_token=XXXXXXX&count=10");
$result = json_decode($result);
foreach ($result->data as $post) {
echo '{"name":"Hello","imgpath":" ';echo $post->images->low_resolution->url;echo '"},';
}
?>]

Answer 1

Use json_encode()
<?php
...
$json = array();
foreach ($result->data as $post){
$json[]=array(
'name'=>'Hello',
'imgpath'=>$post->images->low_resolution->url,
);
}
header('Content-Type: application/json');
exit(json_encode($json));
?>

Answer 2

Store the whole thing in a string instead of echoing it, then you can cut the last character using $string=substr($string,0,-1);
[<?php
function fetchData($url){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_TIMEOUT, 20);
$result = curl_exec($ch);
curl_close($ch);
return $result;
}
$result = fetchData("https://api.instagram.com/v1/users/XXXXXXX/media/recent/?access_token=XXXXXXX&count=10");
$string="";
$result = json_decode($result);
foreach ($result->data as $post) {
$string.='{"name":"Hello","imgpath":"' . $post->images->low_resolution->url . '"},';
}
echo substr($string,0,-1);
?>]

Answer 3

Maybe something like:
// quick and dirty solution
foreach ($result->data as $index => $post) {
$comma = ',';
if ((int) $index === count($result->data) -1) {
$comma = '';
}
$string.='{"name":"Hello","imgpath":" ';echo $post->images->low_resolution->url;echo '"}'.$comma;
}

Answer 4

I would use implode, quite cleaner:
$result = json_decode($result);
$string = '{"name":"Hello","imgpath":"';
$string .= implode( '}, {"name":"Hello","imgpath":"', $result->data );
$string .= '}';
echo $string;