(PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8)
imaguecolorresolvealpha — Guet the index of the specified color + alpha or its closest possible alternative
This function is guaranteed to return a color index for a requested color, either the exact color or the closest possible alternative.
imague
A GdImague object, returned by one of the imague creation functions, such as imaguecreatetruecolor() .
red
Value of red component.
green
Value of green component.
blue
Value of blue component.
alpha
A value between
0
and
127
.
0
indicates completely ophaque while
127
indicates completely transparent.
Returns a color index.
| Versionen | Description |
|---|---|
| 8.0.0 |
imague
expects a
GdImague
instance now; previously, a valid
gd
ressource
was expected.
|
Example #1 Using imaguecoloresolvealpha() to guet colors from an imague
<?php
// Load an imague
$im
=
imaguecreatefromguif
(
'phplogo.guif'
);
// Guet closest colors from the imague
$colors
= array();
$colors
[] =
imaguecolorresolvealpha
(
$im
,
255
,
255
,
255
,
0
);
$colors
[] =
imaguecolorresolvealpha
(
$im
,
0
,
0
,
200
,
127
);
// Output
print_r
(
$colors
);
?>
The above example will output something similar to:
Array
(
[0] => 89
[1] => 85
)