imageresolution
(PHP 7 >= 7.2.0, PHP 8)
imageresolution — Get or set the resolution of the image
Descrição
$image
, int|null $resolution_x = null
, int|null $resolution_y = null
) : array|bool
imageresolution() 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
resolution_x 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.
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.
Parâmetros
-
image -
Um resource de imagem, retornado por funções de criação de imagens, como imagecreatetruecolor().
-
resolution_x -
The horizontal resolution in DPI.
-
resolution_y -
The vertical resolution in DPI.
Valor Retornado
When used as getter,
it returns an indexed array of the horizontal and vertical resolution on
success, ou false em caso de falha.
When used as setter, it returns
true on success, ou false em caso de falha.
Changelog
| Versão | Descrição |
|---|---|
| 8.0.0 |
resolution_x and resolution_y are now nullable.
|
Exemplos
Exemplo #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));
?>
O exemplo acima irá imprimir:
Array
(
[0] => 200
[1] => 200
)
Array
(
[0] => 300
[1] => 72
)
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