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PHP: Get Image Size
The PHP function: getimagesize() is an easy way to find the size of an image.
From the official documentation:
The getimagesize() function will determine the size of any GIF, JPG, PNG, SWF, SWC, PSD, TIFF, BMP, IFF, JP2, JPX, JB2, JPC, XBM, or WBMP image file and return the dimensions along with the file type and a height/width text string to be used inside a normal HTML tag.
If accessing the filename image is impossible, or if it isn't a valid picture, getimagesize() will return FALSE and generate an error of level E_WARNING.
code snippet:
<?php
// get image size example
// http://php.snippetdb.com
list($width, $height, $type, $attr) = getimagesize("images/sample.jpg");
?>
notes:
The getimagesize() function does NOT require the GD library.
Returns an array with 4 elements.
Index 0 contains the width of the image in pixels.
Index 1 contains the height.
Index 2 is a flag indicating the type of the image: 1 = GIF, 2 = JPG, 3 = PNG, 4 = SWF, 5 = PSD, 6 = BMP, 7 = TIFF(intel byte order), 8 = TIFF(motorola byte order), 9 = JPC, 10 = JP2, 11 = JPX, 12 = JB2, 13 = SWC, 14 = IFF, 15 = WBMP, 16 = XBM. These values correspond to the IMAGETYPE constants that were added in PHP 4.3.0.
Index 3 is a text string with the correct height="yyy" width="xxx" string that can be used directly in an IMG tag.
