imagettftext function not working in php - php

Question

I have the following code for my captcha. The lines in the image are generated but the 4 digit number is not displayed. I assume there is some problem in
imagettftext($image,$font_size,0,15,30,$text_color,'font.TTF',$text);
function of code. I tried setting the path to the font file using $_server['DOCUMENT_ROOT']; yet didn't work.
here's the code:
<?php
session_start();
header('Content-type: image/jpeg');
$text= $_SESSION['secure'];
$font_size =30;
$image_width= 110;
$image_height=40;
$image=imagecreate($image_width,$image_height);
imagecolorallocate($image, 255, 255, 255);
$text_color = imagecolorallocate($image, 0, 0, 0);
for($x=1; $x<=30; $x++){
$x1 = rand(1,100);
$x2 = rand(1,100);
$y1 = rand(1,100);
$y2 = rand(1,100);
imageline($image, $x1, $x2, $y1, $y2, $text_color);
}
imagettftext($image,$font_size,0,15,30,$text_color,'font.TTF',$text);
imagejpeg($image);
?>

Answer 1

Below code Perfectly working in my pc
Remember font path should be correct.
output-
<?php
// Set the content-type
header('Content-type: image/png');
// Create the image
$im = imagecreatetruecolor(400, 30);
// Create some colors
$white = imagecolorallocate($im, 255, 255, 255);
$grey = imagecolorallocate($im, 128, 128, 128);
$black = imagecolorallocate($im, 0, 0, 0);
imagefilledrectangle($im, 0, 0, 399, 29, $white);
// The text to draw
$text = 'Testing...';
// Replace path by your own font path
$font = 'arial.ttf';
// Add some shadow to the text
imagettftext($im, 20, 0, 11, 21, $grey, $font, $text);
// Add the text
imagettftext($im, 20, 0, 10, 20, $black, $font, $text);
// Using imagepng() results in clearer text compared with imagejpeg()
imagepng($im);
imagedestroy($im);