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PX : code

Superimpose text over blank image by Marcus
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<?php

        header("Content-type: image/png");

        $string = $_GET['label'];


        $symbols=array('r','g','b');

        for($i=0;$i<count($symbols);$i++) {
            $this=$symbols[$i]; if(is_numeric($_GET[$this])) { $$this=$_GET[$this]; } else { $$this=0; }
        }

        $symbols=array('tr','tg','tb');

        for($i=0;$i<count($symbols);$i++) {
            $this=$symbols[$i]; if(is_numeric($_GET[$this])) { $$this=$_GET[$this]; } else { $$this="255"; }
        }

        if(isset($_GET['font'])) { $font = $_GET['font']; } else { $font="2"; }
        $len=strlen($string);
        $text_width = imagefontwidth($font);
        $text_height = imagefontwidth($font);
        $im  = imagecreate (($len*$text_width)+10, $text_height+10); /* Create a blank image */
        $bgc = imagecolorallocate ($im, $r, $g, $b);
        $tc  = imagecolorallocate ($im, $tr, $tg, $tb);
        imagefilledrectangle ($im, 0, 0, 150, 30, $bgc);
        imagestring ($im, $font, 5, 0, "$string", $tc);
        imagepng($im);
        imagedestroy($im);
?>

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Use of any code from PX is at your own risk.