PHP GD - Align text center-horizontally and decrease font size to keep it inside the image

Question

Hope you are doing great.

I’m still a newbie with php so after making some reading and while checking some posts here I was able to put some text over an image with the

Answer 1

You need the width of the image and the width of the text to relate both.

// get image dimensions
list($img_width, $img_height,,) = getimagesize("fabian.jpg");

// find font-size for $txt_width = 80% of $img_width...
$font_size = 1; 
$txt_max_width = intval(0.8 * $img_width);    

do {        
    $font_size++;
    $p = imagettfbbox($font_size, 0, $font_path, $text);
    $txt_width = $p[2] - $p[0];
    // $txt_height=$p[1]-$p[7]; // just in case you need it
} while ($txt_width <= $txt_max_width);

// now center the text
$y = $img_height * 0.9; // baseline of text at 90% of $img_height
$x = ($img_width - $txt_width) / 2;

imagettftext($jpg_image, $font_size, 0, $x, $y, $white, $font_path, $text);

Answer 2

You can use stil/gd-text class to align the text. Disclaimer: I am the author.

<?php
use GDText\Box;
use GDText\Color;

$jpg_image = imagecreatefromjpeg('fabian.jpg');

$textbox = new Box($jpg_image);
$textbox->setFontSize(75);
$textbox->setFontFace('fabian.TTF');
$textbox->setFontColor(new Color(255, 255, 255));
$textbox->setBox(
    50,  // distance from left edge
    50,  // distance from top edge
    200, // textbox width
    100  // textbox height
);

// text will be aligned inside textbox to center horizontally and to top vertically
$textbox->setTextAlign('center', 'top');
$textbox->draw(strtoupper($nombre));

However it is not a complete answer, because it can't decrease font size automatically.