(PHP 4 >= 4.0.6, PHP 5, PHP 7)
imagecolorresolvealpha — Get the index of the specified color + alpha or its closest possible alternative
$image
, int $red
, int $green
, int $blue
, int $alpha
) : intThis function is guaranteed to return a color index for a requested color, either the exact color or the closest possible alternative.
imageO resursă - imagine, întoarsă de una din funcțiile de creare a imaginilor, cum ar fi imagecreatetruecolor().
redValoarea componentei roșii.
greenValoarea componentei verzi.
blueValoarea componentei albastre.
alphaA value between 0 and 127. 0 indicates completely opaque while 127 indicates completely transparent.
Returns a color index.
Example #1 Using imagecoloresolvealpha() to get colors from an image
<?php
// Load an image
$im = imagecreatefromgif('phplogo.gif');
// Get closest colors from the image
$colors = array();
$colors[] = imagecolorresolvealpha($im, 255, 255, 255, 0);
$colors[] = imagecolorresolvealpha($im, 0, 0, 200, 127);
// Output
print_r($colors);
imagedestroy($im);
?>
Exemplul de mai sus va afișa ceva similar cu:
Array
(
[0] => 89
[1] => 85
)