How do I find the size in KB of a photo?
How to Calculate Image Size – Quick Summary
- Multiply the width and height of the image, in pixels, to get the total pixel count.
- Multiply the total number of pixels by 3 to get the size of the image in bytes.
- Divide the number of bytes by 1024 to get the image size in kilobytes.
Table of Contents
What is KB in image size?
The acronym ‘KB’ refers to a ‘kilobyte’, a unit of measurement used to describe the size of a digital file. A kilobyte is made up of 1,024 bytes of digital information.
How does PHP calculate file size?
To get the size of the file, we will use the filesize() function. The filesize() function returns the size of a file in bytes. This function accepts the filename as a parameter and returns the size of a file in bytes on success and False on failure.
How can I get the height of the image in PHP?
The getimagesize() function in PHP is a built-in function used to get the size of an image. This function accepts the file name as a parameter and determines the size of the image and returns the dimensions with the file type and the height/width of the image.
How can I know the size of an image?
Control + click on an image to view the properties of an image.
- Click Finder in your Dock.
- Find the image you want to check.
- Control+click (ctrl+click) on your image. A menu appears.
- Click Get Info.
- Expand the General: section to see the file size of your image.
- Expand the More Info: section to see the dimensions of your image.
Is KB more than GB?
The difference between KB and GB Gigabyte is greater than Kilobyte. KB has the prefix Kilo. GB has the prefix Giga. Gigabyte is 1,000,000 times larger than Kilobyte.
How to get the size of an image in PHP?
The getimagesize() function will determine the size of any supported image file and return the dimensions along with the file type and a height/width string for use within a normal HTML IMG tag and the corresponding HTTP content type. getimagesize() can also return more information in the image_info parameter.
Can you get the size of a remote file in PHP?
The file size feature will not work with remote files. If you try to get the size of a remote file using the file size function, the following warning will be displayed: This is because the underlying stat command does not support remote files. See: Get the size of a remote file using PHP.
What happens when PHP file size exceeds 2GB?
Note: Because PHP’s integer type is signed and many platforms use 32-bit integers, some file system functions may return unexpected results for files larger than 2 GB. In case of failure, an E_WARNING is issued. Note: The results of this function are cached. See clearstatcache() for more details.
How to get the dimensions of a JPEG file?
There is a code snippet to get the JPEG image dimensions by getting just the first few bytes of the file, but it doesn’t work for PNG files, so I wrote one. It will download only the first 24 bytes instead of the entire image, and thus will be much faster than getimagesize() and save bandwidth at the same time:
