Checking if an image URL exist with PHP….
Posted on: July 22, 2008
- In: CakePHP | CodeIgniter | PHP
- 51 Comments
To check if an image/file URL exist, first thing came in my mind was file_exist() function. Thought it would be the best way to find whether my parameter that is throwing an image url is right or wrong. So I had to set a default image if there was no image found from the given link. file_exist() has a problem that it reads the directory of the file/image so when i’m reading an URL it will always return false. Well, I could separate the directory from the URL but it would be lengthy and messy, so I was searching for a better way. After reading the PHP manual online version I have found that this task can be done by getimagesize(). It returns an Array() with 7 elements. So idea is simple, if I get an array from the given URL then I can say that image is found otherwise not!
An example could be like this:
$url=getimagesize(“http://www.flickr.com/photos/27505599@N07/2564389539/”);
if(!is_array($url))
{
$default_image =”…/directoryFolder/junal.jpg”;
}
51 Responses to "Checking if an image URL exist with PHP…."
July 22, 2008 at 10:33 pm
whoops ! Thanks Tanzil …..forgot a big thing he he ….that was a typo!
August 6, 2008 at 11:58 pm
But I get this warning message even though it works properly.
Warning: getimagesize(images/cars/4.thumb.jpg) [function.getimagesize]: failed to open stream: No such file or directory
For example, I have:
if (!is_array($imgcheck))
{
$imgurl = ‘images/cars/na.thumb.jpg’;
}
else {
$imgurl = ‘images/cars/’ . $row[“id”] . ‘.thumb.jpg’;
}
So when the img src refers to $imgurl as the source, it displays na.thumb.jpg correctly, but there is still the warning message displayed above it…saying that it could not find the image.
How can I remove/avoid this?
Thanks
August 7, 2008 at 1:58 am
are you sure your directory (images/cars/4.thumb.jpg) is right one ? i have doubt ..please submit your full code. thanks
August 7, 2008 at 5:16 am
Yes the directory is fine. Like I said, it works and it displays the alternate image properly, it just also includes the Warning message.
For some reason, it worked fine when testing it on my own machine, but when I uploaded to the host, thats the warning I got. That is pretty much the entire code, at lease all of that deals with the “image exists” part.
Thanks
August 7, 2008 at 5:17 am
And even if the directly wasn’t the right one, isn’t the whole point of this to figure out whether the file (file path) exists?
Any suggestions?
Thanks
August 8, 2008 at 12:54 am
Hi,
Just thought I’d let you know, problem solved.
It was just including a warning message, so I included ‘@’ in front of getimagesize.
So:
$imgurl_check = ‘imgurl’;
if (!is_array(@getimagesize($imgurl_check)))
{
..
}
December 23, 2008 at 8:59 pm
well, hi admin adn people nice forum indeed. how’s life? hope it’s introduce branch 😉
February 11, 2009 at 9:31 pm
I found this function very slow so I came up with another solution to the problem. The function below only gets 1 byte of data from the image and it seems to be a bit quicker on my server at least:
function url_exists($url) {
if(@file_get_contents($url,0,NULL,0,1)){return 1;}else{ return 0;}
}
Cheers,
cron
April 14, 2009 at 9:00 pm
Cron’s code above also worked much faster for me. Nice contributions on all sides.
April 23, 2009 at 12:42 am
I say this works…
function image_exists($url)
{
$info = @getimagesize(urlencode($url));
return((bool) $info);
}
June 5, 2009 at 1:20 pm
thanks,
I prefer to use your code, pushpinder.
I say this works…
function image_exists($url)
{
$info = @getimagesize(urlencode($url));
return((bool) $info);
}
because, this one is take long time to load…
$url=@getimagesize($url);
if(!is_array($url))
{
June 22, 2009 at 10:34 am
What if an image doesn’t exist at the url…? How do I make it not show an error?
January 7, 2010 at 7:01 pm
img src=”xx.jpg” alt=”Anshul Srivastava” onerror=’this.src=”yy.gif”‘
October 14, 2011 at 2:17 pm
You could also do: img src=”xx.jpg” alt=”Anshul Srivastava” onerror=”this.height=’0′”
nice and fast, but alas… it puts browser into an infinite loop if yy.gif does not exist. And FF continues reading the page if images have been blocked in the browser setting.
In addition, the onerror attribute does not validate as XHTML 1.0 Transitional
May 6, 2011 at 1:41 am
That is exactly what I needed! Thank you for sharing this – saved me a big headache.
November 11, 2011 at 5:51 pm
css is probably much easier to define a max-width:
.theImg { max-width:100px; }
January 15, 2012 at 1:05 am
yeah this code sucks and doesn’t work right if the image isn’t in the directory it gives the warning everyone has been saying and this will affect your google ranking I just got a google alert today about it.
August 14, 2012 at 4:59 pm
thank you!
( onerror=”Javascript” )
Why complicate things when you can make simple xD
October 29, 2012 at 1:13 am
$essais = get_headers($url, 1); if (preg_match(“#OK#i”, $essais[0])) $img_url_big=$img_url= $url;
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Junal on the run 
July 22, 2008 at 10:24 pm
Did you miss the following line?
$url = getimagesize($url);