Php Image Convert Color

Php Image Convert Color

<?php
$myRed = 255;
$myGreen = 0;
$myBlue = 0;

$im = imagecreatefrompng('http://www.clker.com/cliparts/a/5/8/e/1298546227709322759png-transparency-md.png');
imageAlphaBlending($im, true);
imageSaveAlpha($im, true);

if (imageistruecolor($im))
{
    $sx = imagesx($im);
    $sy = imagesy($im);
    for ($x = 0; $x < $sx; $x++)
    {
        for ($y = 0; $y < $sy; $y++)
        {
            $c = imagecolorat($im, $x, $y);
            $a = $c & 0xFF000000;
            $newColor = $a | $myRed << 16 | $myGreen << 8 | $myBlue;
            imagesetpixel($im, $x, $y, $newColor );
        }
    }
} else {
    $numColors = imagecolorstotal($im);
    $transparent = imagecolortransparent($im);

    for ($i=0; $i < $numColors; $i++)
    {
        if ($i != $transparent)
            imagecolorset($im, $i, $myRed, $myGreen, $myBlue, $myAlpha);

    }
}

header('Content-Type: image/png');
imagepng($im);
imagedestroy($im);
?>