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imageresolution

Description

The imageresolution of Image for PHP get or set the resolution of the image.

Syntax

imageresolution(
    GdImage $image,
    ?int $resolution_x = null,
    ?int $resolution_y = null
): array|bool

Parameters

image

A GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor().

resolution_x

The horizontal resolution in DPI.

resolution_y

The vertical resolution in DPI.

Return

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

Examples

1 · image

<?

$width = 100;
$height = 100;
$image = imagecreate($width, $height);

$return = imageresolution($image);

print_r($return);

?>
Array
(
    [0] => 96
    [1] => 96
)

2 · resolution_x

<?

$width = 100;
$height = 100;
$image = imagecreate($width, $height);

$resolution_x = 192;

$return = imageresolution($image, $resolution_x);

var_export($return);

$resolution = imageresolution($image);

echo PHP_EOL;
print_r($resolution);

?>
true
Array
(
    [0] => 192
    [1] => 192
)

3 · resolution_y

<?

$width = 100;
$height = 100;
$image = imagecreate($width, $height);

$resolution_x = 192;
$resolution_y = 96;

$return = imageresolution($image, $resolution_x, $resolution_y);

var_export($return);

$resolution = imageresolution($image);

echo PHP_EOL;
print_r($resolution);

?>
true
Array
(
    [0] => 192
    [1] => 96
)
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