GD

<?php

function randstr($length, $hash = "abcdefghijklmnopqrstuvwxyz0123456789") {
    $strlength = strlen($hash);

    $string = "";
    for($i = 0; $i < $length; $i++) {
                $random = rand(0, $strlength) - 1;

            $string .= substr($hash, $random, 1);
    }

    return $string;
} 

$string = randstr(8);

$width = "100";
$height = "100";

$imgTXT = $string; //tekst die op de afbeelding komt
$hTXT = $height / rand(2,10);
$angleTXT = rand(0,150);
$imgCreate = ImageCreate($width, $height); //breedte, hoogte
$imgBg = ImageColorAllocate($imgCreate, 51, 51, 51);
$imgFg = ImageColorAllocate($imgCreate, 255, 255, 255);

ImageFill($imgCreate, 1, 1, $imgBg);
// ImageString($imgCreate, 20, 5, $hTXT, $imgTXT, $imgFg);

Imagettftext($imgCreate,20,$angleTXT,5,5,$imgFg,'arial.ttf',$string);

// Imagettftext (int im, int size, int angle, int x, int y, int col, string fontfile, string text) = hoe de query werkt

header('Content-type: image/png');
ImagePNG($imgCreate);
ImageDestroy($imgCreate);
?>

<?php
 
function randstr($length, $hash = "abcdefghijklmnopqrstuvwxyz0123456789") {
    $strlength = strlen($hash);
 
    $string = "";
    for($i = 0; $i < $length; $i++) {
                $random = rand(0, $strlength) - 1;
 
            $string .= substr($hash, $random, 1);
    }
 
    return $string;
} 
 
$string = randstr(8);
 
$width = "100";
$height = "100";
 
$imgTXT = $string; //tekst die op de afbeelding komt
$hTXT = $height / rand(2,10);
$angleTXT = rand(0,150);
$imgCreate = ImageCreate($width, $height); //breedte, hoogte
$imgBg = ImageColorAllocate($imgCreate, 51, 51, 51);
$imgFg = ImageColorAllocate($imgCreate, 255, 255, 255);
 
ImageFill($imgCreate, 1, 1, $imgBg);
// ImageString($imgCreate, 20, 5, $hTXT, $imgTXT, $imgFg);
 
Imagettftext($imgCreate,20,$angleTXT,5,5,$imgFg,'arial.ttf',$string);
 
// Imagettftext (int im, int size, int angle, int x, int y, int col, string fontfile, string text) = hoe de query werkt
 
header('Content-type: image/png');
ImagePNG($imgCreate);
ImageDestroy($imgCreate);
?>