Multiple examples of php getimagesize detecting the size of uploaded images

function CheckImageSize($ImageFileName,$LimitSize)
{
 $size=GetImageSize($ImageFileName);
 if ($size[0]>$LimitSize[0]||$size[1]> $LimitSize[1]){
 echo 'Sorry, the size of the image you want to upload is too large';
 return false;
 }
return true;
}

Note, the return of the GetImageSize() function Value is an array.

For example:

$arr = getimagesize("1.jpg");
/*
* Here $arr is an array type
* $arr[0] is the width of the image
* $arr[1] is the image The height
* $arr[2] is the format of the image, including jpg, gif and png, etc.
* $arr[3] is the width and height of the image, the content is width="xxx" height="yyy" */

Example 3, getimagesize function usage.

$size = getimagesize($filename);
$fp=fopen($filename, "rb");
if ($size && $fp) { // bbs.it- home.org
 header("Content-type: {$size['mime']}");
 fpassthru($fp);
 exit;
} else {
 // error
}
?>

Example 4, getimagesize function usage (example from php manual).

$size = getimagesize("testimg.jpg", &$info);
if (isset($info["APP13"])) {
 $iptc = iptcparse($info ["APP13"]);
 var_dump($iptc);
}
?>