Makes the colors of the palette version of an image more closely match the true color version
Syntax
imagecolormatch( GdImage $image1, GdImage $image2 ): bool
Parameters
image1
A truecolor image object.
image2
A palette image object pointing to an image that has the same size as image1.
Return
Returns true on success or false on failure.
Examples
1 · return
<? $width = 100; $height = 100; $image1 = imagecreatetruecolor($width, $height); $image2 = imagecreate($width, $height); $red = 255; $green = 255; $blue = 255; imagecolorallocate($image2, $red, $green, $blue); $return = imagecolormatch($image1, $image2); var_export($return); ?>
true
2 · base64
<? $width = 100; $height = 100; $image1 = imagecreatetruecolor($width, $height); ob_start(); imagepng($image1); $output1 = ob_get_clean(); $image2 = imagecreate($width, $height); $red = 255; $green = 255; $blue = 255; imagecolorallocate($image2, $red, $green, $blue); ob_start(); imagepng($image2); $output2 = ob_get_clean(); imagecolormatch($image1, $image2); ob_start(); imagepng($image2); $output3 = ob_get_clean(); echo '<!doctype html> <html> <body> <img src="data:image/png;base64,' . base64_encode($output1) . '"><br> <img src="data:image/png;base64,' . base64_encode($output2) . '"><br> <img src="data:image/png;base64,' . base64_encode($output3) . '"> </body> </html>'; ?>
<!doctype html> <html> <body> <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAGQAAABkCAIAAAD/gAIDAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAANElEQVR4nO3BAQ0AAADCoPdPbQ43oAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAfgx1lAABqFDyOQAAAABJRU5ErkJggg=="><br> <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAGQAAABkAQMAAABKLAcXAAAAA1BMVEX///+nxBvIAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAFElEQVQ4jWNgGAWjYBSMglFATwAABXgAAfmlXscAAAAASUVORK5CYII="><br> <img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAGQAAABkAQMAAABKLAcXAAAAA1BMVEUAAACnej3aAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAFElEQVQ4jWNgGAWjYBSMglFATwAABXgAAfmlXscAAAAASUVORK5CYII="> </body> </html>