imagecolorresolvealpha

(PHP 4 >= 4.0.6, PHP 5, PHP 7)

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imagecolorresolvealpha ( resource $image , int $red , int $green , int $blue , int $alpha ) : int

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image

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red

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green

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blue

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alpha

A value between 0 and 127. 0 indicates completely opaque while 127 indicates completely transparent.

The colors parameters are integers between 0 and 255 or hexadecimals between 0x00 and 0xFF.

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Returns a color index.

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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);
?>

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Array
(
    [0] => 89
    [1] => 85
)

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