php how to get web image size in kb?
getimagesize
only get the width and height.
and filesize
caused waring
.
$imgsize=filesize("http://static.adzerk.net/Advertisers/2564.jpg");
echo $imgsize;
Warning: filesize() [function.filesize]: stat failed for http://static.adzerk.net/Advertisers/2564.jpg
Is there any other way to get a web image size in kb?
Short of doing a complete HTTP request, there is no easy way:
$img = get_headers("http://static.adzerk.net/Advertisers/2564.jpg", 1);
print $img["Content-Length"];
You can likely utilize cURL
however to send a lighter HEAD
request instead.
<?php
$file_size = filesize($_SERVER['DOCUMENT_ROOT']."/Advertisers/2564.jpg"); // Get file size in bytes
$file_size = $file_size / 1024; // Get file size in KB
echo $file_size; // Echo file size
?>
That sounds like a permissions issue because filesize() should work just fine.
Here is an example:
php > echo filesize("./9832712.jpg");
1433719
Make sure the permissions are set correctly on the image and that the path is also correct. You will need to apply some math to convert from bytes to KB but after doing that you should be in good shape!
Not sure about using filesize()
for remote files, but there are good snippets on php.net though about using cURL.
http://www.php.net/manual/en/function.filesize.php#92462
Here is a good link regarding filesize()
You cannot use filesize() to retrieve remote file information. It must first be downloaded or determined by another method
Using Curl here is a good method:
Tutorial
You can use also this function
<?php
$filesize=file_get_size($dir.'/'.$ff);
$filesize=$filesize/1024;// to convert in KB
echo $filesize;
function file_get_size($file) {
//open file
$fh = fopen($file, "r");
//declare some variables
$size = "0";
$char = "";
//set file pointer to 0; I'm a little bit paranoid, you can remove this
fseek($fh, 0, SEEK_SET);
//set multiplicator to zero
$count = 0;
while (true) {
//jump 1 MB forward in file
fseek($fh, 1048576, SEEK_CUR);
//check if we actually left the file
if (($char = fgetc($fh)) !== false) {
//if not, go on
$count ++;
} else {
//else jump back where we were before leaving and exit loop
fseek($fh, -1048576, SEEK_CUR);
break;
}
}
//we could make $count jumps, so the file is at least $count * 1.000001 MB large
//1048577 because we jump 1 MB and fgetc goes 1 B forward too
$size = bcmul("1048577", $count);
//now count the last few bytes; they're always less than 1048576 so it's quite fast
$fine = 0;
while(false !== ($char = fgetc($fh))) {
$fine ++;
}
//and add them
$size = bcadd($size, $fine);
fclose($fh);
return $size;
}
?>
You can get the file size by using the get_headers() function. Use below code:
$image = get_headers($url, 1);
$bytes = $image["Content-Length"];
$mb = $bytes/(1024 * 1024);
echo number_format($mb,2) . " MB";