php array of pictures with redirect - php

Question

There is a file with a lot location of pictures, foo.txt.
http://foo/bar1.png
http://foo/bar2.png
http://foo/bar3.png
I make an array and each is displayed, but some pictures are missing.
The server thus forwards on the same 404 image for all.
http://foo/404_bar.png
How I can show pictures - if there is a redirect, that this picture does not show. We need this to understand dynamically.
$lines = file("foo.txt")
foreach ($lines as $line_num => $line) {
echo '<img src="', $line ,'"><br>';}
Browser show:
bar1.png
404_bar.png
404_bar.png
As the bar2.png and bar3.png images are missing on the server, he is displayed 404_bar.png. Me need to display only:
bar1.png
I think it is necessary to dig the headers.

Answer 1

as I understand from your question, you need to only show the existed images, so you should check the urls if they are exist or not:
$lines = file("foo.txt")
foreach ($lines as $line_num => $line) {
if(is_url_exist($line))
echo '<img src="', $line ,'"><br>';
}
function is_url_exist($url){
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_NOBODY, true);
curl_exec($ch);
$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
if($code == 200){
$status = true;
}else{
$status = false;
}
curl_close($ch);
return $status;
}