imageresolution

(PHP 7 >= 7.2.0)

imageresolution — Get or set the resolution of the image

Açıklama

mixed imageresolution ( resource $image [, int $res_x [, int $res_y ]] )

imageresolution() allows to set and get the resolution of an image in DPI (dots per inch). If none of the optional parameters is given, the current resolution is returned as indexed array. If only res_x is given, the horizontal and vertical resolution are set to this value. If both optional parameters are given, the horizontal and vertical resolution are set to these values, respectively.

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.

Değiştirgeler

resim: imagecreatetruecolor() gibi bir resim oluşturma işlevinden dönen bir resim verisi.
res_x: The horizontal resolution in DPI.
res_y: The vertical resolution in DPI.

Dönen Değerler

When used as getter (that is without the optional parameters), it returns TRUE on success, başarısızlık durumunda FALSE döner. When used as setter (that is with one or both optional parameters given), it returns an indexed array of the horizontal and vertical resolution on success, başarısızlık durumunda FALSE döner.

Örnekler

Örnek 1 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));
?>

Yukarıdaki örneğin çıktısı:

Array
(
    [0] => 200
    [1] => 200
)
Array
(
    [0] => 300
    [1] => 72
)