getimagesize

Get the size of an image

 **getimagesize** string $filename array $image_info

The function will determine the size of any supported given image file and return the dimensions along with the file type and a text string to be used inside a normal tag and the correspondent content type. getimagesize``height/width

can also return some more information

in parameter. getimagesize``image_info

Let op: > This function expects to be a valid image file. If a non-image file is supplied, it may be incorrectly detected as an image and the function will return successfully, but the array may contain nonsensical values. filename
Do not use  to check that a given
file is a valid image. Use a purpose-built solution such as the
 extension instead.
getimagesizeFileinfo

Opmerking: > Note that JPC and JP2 are capable of having components with different bit depths. In this case, the value for "bits" is the highest bit depth encountered. Also, JP2 files may contain . In this case, returns the values for the first codestream it encounters in the root of the file. multiple JPEG 2000 codestreams``getimagesize

Opmerking: > The information about icons are retrieved from the icon with the highest bitrate.

Opmerking: > GIF images consist of one or more frames, where each frame may only occupy part of the image. The size of the image which is reported by is the overall size (read from the logical screen descriptor). getimagesize

filename This parameter specifies the file you wish to retrieve information about. It can reference a local file or (configuration permitting) a remote file using one of the . supported streams

image_info This optional parameter allows you to extract some extended information from the image file. Currently, this will return the different APP markers as an associative array. Some programs use these APP markers to embed text information in images. A very common one is to embed information in the APP13 marker. You can use the function to parse the binary APP13 marker into something readable. IPTCiptcparse

Opmerking: > The only supports files. image_info

Returns an array with up to 7 elements. Not all image types will include the and elements. channels``bits

Index 0 and 1 contains respectively the width and the height of the image.

Opmerking: > Some formats may contain no image or may contain multiple images. In these cases, might not be able to properly determine the image size. will return zero for width and height in these cases. getimagesize``getimagesize

Opmerking: > is agnostic of any image metadata. If e.g. the Exif flag is set to a value which rotates the image by 90 or 270 degress, index 0 and 1 are swapped, i.e. the contain the height and width, respectively. getimagesize``Orientation

Index 2 is one of the constants indicating the type of the image. IMAGETYPE_*

Index 3 is a text string with the correct string that can be used directly in an tag. height="yyy" width="xxx"

is the correspondant MIME type of the image.

This information can be used to deliver images with the correct HTTP header:

mime``Content-typeVoorbeeld: and MIME types

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

will be 3 for RGB pictures and 4 for CMYK

pictures. channels

is the number of bits for each color.

bits

For some image types, the presence of and values can be a bit confusing. As an example, always uses 3 channels per pixel, but the number of bits per pixel cannot be calculated for an animated with a global color table. channels``bits

On failure, false is returned.

If accessing the image is impossible will generate an error of level . On read error, will generate an error of level . filename``getimagesize``E_WARNING``getimagesize``E_NOTICE

As of PHP 8.0.0, a is thrown if is empty. filename

Voorbeeld: example

<?php
list($width, $height, $type, $attr) = getimagesize("img/flag.jpg");
echo "<img src=\"img/flag.jpg\" $attr alt=\"getimagesize() example\" />";
?>

Voorbeeld: getimagesize (URL)

<?php
$size = getimagesize("http://www.example.com/gifs/logo.gif");

// if the file name has space in it, encode it properly
$size = getimagesize("http://www.example.com/gifs/lo%20go.gif");

?>

Voorbeeld: getimagesize() returning IPTC

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

image_type_to_mime_type``exif_imagetype``exif_read_data``exif_thumbnail``imagesx``imagesy

Vorige ← gd_info Volgende getimagesizefromstring →

getimagesize

getimagesize

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