Display underlined text using php GD library

Question

What is the best way to display underlined text and output the result as an image using GD or any other library?

Answer 1

You can try using a Unicode character combining a character U+0332.

<?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);
$black = imagecolorallocate($im, 0, 0, 0);
imagefilledrectangle($im, 0, 0, 399, 29, $white);

// The text to draw
$text = "&#x0332;U&#x0332;d&#x0332;e&#x0332;r&#x0332;l&#x0332;i&#x0332;n&#x0332;e";
// Replace path by your own font path
$font = 'arial.ttf';


// 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);
?>

Answer 2

There are many FREE PHP CAPTCHAs that come with many settings, download and view what happens behind the scenes. Also look at the link

NTN

Answer 3

I use this ...

    $font = imageloadfont($font_file);  
$font_width = ImageFontWidth($font);
$font_height = ImageFontHeight($font);
    $str_width = strlen($text)*$font_width;
    ImageLine($image, $left, $top+$font_height, $left+$str_width,  $top+$font_height, $color);