php how to get web image size in kb?

Question

php how to get web image size in kb?

getimagesize only get the width and height.

and filesize caused waring.

Answer 1

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";

Answer 2

<?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
?>

Answer 3

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.

Answer 4

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;
}
?>

Answer 5

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

Answer 6

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