imagecolorexact
(PHP 4, PHP 5, PHP 7)
imagecolorexact — Get the index of the specified color
Description
int imagecolorexact ( resource $image , int $red , int $green , int $blue )Returns the index of the specified color in the palette of the image.
If you created the image from a file, only colors used in the image are resolved. Colors present only in the palette are not resolved.
Parameters
`image` An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
red
Value of red component.
green
Value of green component.
blue
Value of blue component.
Return Values
Returns the index of the specified color in the palette, or -1 if the color does not exist.
Examples
Example #1 Get colors from the GD logo
<?php
// Setup an image
$im = imagecreatefrompng('./gdlogo.png');
$colors = Array();
$colors[] = imagecolorexact($im, 255, 0, 0);
$colors[] = imagecolorexact($im, 0, 0, 0);
$colors[] = imagecolorexact($im, 255, 255, 255);
$colors[] = imagecolorexact($im, 100, 255, 52);
print_r($colors);
// Free from memory
imagedestroy($im);
?>The above example will output something similar to:
Array
(
[0] => 16711680
[1] => 0
[2] => 16777215
[3] => 6618932
)See Also
- imagecolorclosest() - Get the index of the closest color to the specified color
← imagecolordeallocate
imagecolorexactalpha →
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