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imageresolution

imageresolution

Get or set the resolution of the image

 **imageresolution** GdImage $image  $resolution_x  $resolution_y

allows to set and get the resolution of

an image in DPI (dots per inch). If the optional parameters are null, the current resolution is returned as an indexed array. If only is not null, the horizontal and vertical resolution are set to this value. If none of the optional parameters are null, the horizontal and vertical resolution are set to these values, respectively. imageresolution``resolution_x

The resolution is only used as meta information when images are read from and written to formats supporting this kind of information (curently PNG and JPEG). It does not affect any drawing operations. The default resolution for new images is 96 DPI.

resolution_xThe horizontal resolution in DPI.

resolution_yThe vertical resolution in DPI.

When used as getter, it returns an indexed array of the horizontal and vertical resolution on success. When used as setter, it always returns true.

Voorbeeld: Setting and getting the resolution of an image

<?php
$im = imagecreatetruecolor(100, 100);
imageresolution($im, 200);
print_r(imageresolution($im));
imageresolution($im, 300, 72);
print_r(imageresolution($im));
?>

Array
(
    [0] => 200
    [1] => 200
)
Array
(
    [0] => 300
    [1] => 72
)
Vorige ← imagerectangle Volgende imagerotate →

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