Try a simple captcha in CI4 - php

Question

I want to implement a simple captcha in ci4, I try to search a sample code in google and then copas it. But when run the code get result like this. Please help what wrong in my code ?
My controller is :
private function captcha()
{
$i = 0;
$imgHeight = 80;
$imgWidth = 250;
$randTotal = 7;
$randomDots = 50;
$randomLines = 25;
$font = realpath('./fonts/monofont.ttf');
$random = '';
$captTextColor = "0x142864";
$noiseColor = "0x142864";
$fontSize = $imgHeight * 0.65;
$random = substr(str_shuffle('abcdefghijklmnopqrstuvwxyz0123456789'), 0,
$randTotal);
$image = #imagecreate($imgWidth, $imgHeight);
$arrTextColor = $this->hexToRGB($captTextColor);
$arrNoiseColor = $this->hexToRGB($noiseColor);
$bgColor = imagecolorallocate($image, 255, 255, 255);
$captTextColor = imagecolorallocate($image, $arrTextColor['red'], $arrTextColor['green'], $arrTextColor['blue']);
$imgNoiseColor = imagecolorallocate($image, $arrNoiseColor['red'], $arrNoiseColor['green'], $arrNoiseColor['blue']);
// Cetak titik acak di latar belakang gambar
for ($i = 0; $i < $randomDots; $i++) {
imagefilledellipse($image, mt_rand(0, $imgWidth), mt_rand(0, $imgHeight), 2, 3, $imgNoiseColor);
}
// Cetak garis acak di latar belakang gambar
for ($i = 0; $i < $randomLines; $i++) {
imageline(
$image,
mt_rand(0, $imgWidth),
mt_rand(0, $imgHeight),
mt_rand(0, $imgWidth),
mt_rand(0, $imgHeight),
$imgNoiseColor
);
}
// Cetak kotak teks dan tambahkan 6 kode huruf captcha
$textBox = imagettfbbox($fontSize, 0, $font, $random);
$x = ($imgWidth - $textBox[4]) / 2;
$y = ($imgHeight - $textBox[5]) / 2;
$_SESSION['captcha'] = $random;
// imagettftext($image, $fontSize, 0, $x, $y, $captTextColor, $font, $random);
imagettftext($image, $fontSize, 0, $x, $y, $captTextColor, $font, $random);
header('Content-Type: image/jpeg');
imagejpeg($image, null, null);
imagedestroy($image);
}
Thank you
Thank you.

Answer 1

Try adding the exit; command after the imagedestroy($image); line