[PHP] How to print text on a jpeg image

writeTextOnImage.php

<?php

  // URL of the font to be downloaded
  $fontURL = "http://www.font-police.com/classique/sans-serif/arial.ttf";

  // Test if the filepath is in parameters and the file exists
  if(empty($argv[1]) || !file_exists($argv[1])) {
    echo "A valid Image path is required! The command syntax is 'php writeTextOnImage.php <input_image_filepath> <input_image_filepath> '<string_to_write>'";
    exit();
  }

  // Set the image filepath
  $inImagePath = $argv[1];  

  // Set Text to Be Printed On Image
  $text = !empty($argv[3]) ? $argv[3] : "Hello world!";

  // Name and path of the output image file
  $outImageName = !empty($argv[2]) ? $argv[2] : "output.jpeg";
  $outImagePath = __DIR__ ."/". $outImageName;

  // Text size, angle, x and y position
  $textOptions = array(
	"size"  => 75,
	"angle" => 20,
	"xPos"  => 100,
	"yPos"  => 400
  );

  // Create Image From Existing File
  $inImg = imagecreatefromjpeg($inImagePath);

  // Make some colors
  $white = imagecolorallocate($inImg, 255, 255, 255);
  $grey = imagecolorallocate($inImg, 128, 128, 128);
  $black = imagecolorallocate($inImg, 0, 0, 0);

  // Download font file and set the font path
  $font = file_get_contents($fontURL);
  $fontName = basename($fontURL);
  $fontPath = __DIR__ ."/". $fontName;
  file_put_contents($fontPath, $font);

  // Write text on image
  if(file_exists($fontPath)) {
    imagettftext($inImg, $textOptions['size'], $textOptions['angle'], $textOptions['xPos'], $textOptions['yPos'], $white, $fontPath, $text);
  }

  // Write Image to path 'output.jpg'
  imagejpeg($inImg, $outImagePath);
  
  // Flush memory
  imagedestroy($inImg);