rieving image types/mime types

[JShor]

Hi, I'd like to retireve the file [mime] type (such as image/jpeg, etc) from an image that already exists on my file system. I know how to do this already in an image upload, but i've searched for a way to retrieve mime type of existing image -- no luck.

Any help is much appreciated.

[techietim]

http://php.net/fileinfo

[james438]

If you know the filename this will pull up some info about the file.

<pre><?php
$image = $_SERVER['DOCUMENT_ROOT'].'/images/Lain.JPG';
$imageinfo = GetimageSize($image);
print_r($imageinfo);
?></pre>

returns

Array
(
    [0] => 1024
    [1] => 768
    [2] => 2
    [3] => width="1024" height="768"
    [bits] => 8
    [channels] => 3
    [mime] => image/jpeg
) 

[0] = width
[1] = height
[2] = indicates the type of image (dunno what that means)
[3] = width and height together
[bits] = number of bits per color
[channels] = channels per pixel (don't know what this means either)
[mime] = jpg, gif, etc. 

If you want to list the images in a given folder use this:

<?php
$imgdir = 'images'; // the directory, where your images are stored
$allowed_types = array('png','jpg','jpeg','gif'); // list of filetypes you want to show
$dimg = opendir($imgdir);
while($imgfile = readdir($dimg))
{
if(in_array(strtolower(substr($imgfile,-3)),$allowed_types))
{
  $a_img[] = $imgfile;
  sort($a_img);
  reset ($a_img);
} 
}
$totimg = count($a_img); // total image number
for($x=0; $x < $totimg; $x++)
{
$size = getimagesize($imgdir.'/'.$a_img[$x]);
// do whatever
$halfwidth = ceil($size[0]/2);
$halfheight = ceil($size[1]/2);
echo 'name: '.$a_img[$x].' width: '.$size[0].' height: '.$size[1].'<br />';
}
?>

techietim, could you give an example of how fileinfo works? I could not get their examples to work.

[jackbenimble4]

As long as you know you will only be working with images, you can use getimagesize() like james438 posted.

If you need to find the mime type of anything else, you should use the Fileinfo extension, like techietem posted. Do not use mime_content_type().