PHP GD Functions

This function is an extended variant of imagettfbbox function which additionally supports the $options.

One of possible ARRAY index for $options is $linespacing that is a FLOAT value wich defines the drawing linespacing.

Check your version of GD, as versions prior to 2.0.18 may produce an error when making a $font_filename call.

The version of GD in use can be viewed by running the gd_info function.


<?php

array|false imageftbbox ( float $size , 
                                        float $angle, 
                                      string $font_filenme, 
                                      string $string, 
                                       array $options = [] )

where,

$size = The font size in points

$angle = The angle in degrees to measure the text

$font_filename = The path to the TrueType font you wish to use

$string = The text STRING to be measured

$options = The extended variant of 
                            imagettfbbox which additionally support

?>

$size

The font size in points.

$angle

The angle in degrees to be written in the image.

$font_filename

The path to the TrueType font you wish to use.

$string

The text string encoded in UTF-8.

$options

This parameter adds extended support for the imagettfbbox function.

EXERCISE


<?php

echo 'PHP VERSION: ' . PHP_VERSION . '<br><br>';

if(PHP_MAJOR_VERSION < 8)
{
$var = getcwd();

$font_name = "$var/ttf/VeraMoIt.ttf";
// complete path
}
else
{
$font_name = "ttf/VeraMoIt.ttf";
} 

$font_size = 30;
$angle_txt = 0;
$pos_x = 30;
$pos_y = 280;
$txt = 'no & zerof';

$d_base_img = 'png/PNG 093 01.png';

$d_dest_img = 'png/PNG 093 01 imageftbbox.png';

echo $d_base_img; ?><br><br>
<img src="<?php echo $d_base_img; ?>"
 alt="<?php echo $d_base_img; ?>" 
 title="<?php echo $d_base_img; ?>"><br><br><br> 
 
<?php

$id_dimgfile = imagecreatefrompng($d_base_img);

$txt_color = 
imagecolorallocate($id_dimgfile, 0xff, 0x00, 0x00);

$ttf_arr = 
imagettftext($id_dimgfile, $font_size, $angle_txt, 
$pos_x, $pos_y, $txt_color, $font_name, $txt );

$tffdbox_arr = 
imageftbbox($font_size, $angle_txt, $font_name, $txt);

imagepng($id_dimgfile, $d_dest_img);

imagedestroy($id_dimgfile);

echo $d_dest_img; ?><br><br>
<img src="<?php echo $d_dest_img; ?>"
 alt="<?php echo $d_dest_img; ?>" 
 title="<?php echo $d_dest_img; ?>">
 
 <?php
 echo '<pre>';
 print_r($tffdbox_arr);
 echo '</pre>';
 
 echo '<pre>';
 print_r($ttf_arr);
 echo '</pre>';
 ?>

RESULT

PNG 093 01.png

PNG 093 01.png apr

PNG 093 01 imageftbbox.png

PNG 093 01 imageftbbox.png apr

THE BOUNDING BOX OF TEXT
key	COORDINATE	MEANING
0	0	x-coordinate LOWER LEFT
1	0	y-coordinate LOWER LEFT
2	145	x-coordinate LOWER RIGHT
3	0	y-coordinate LOWER RIGHT
4	145	x-coordinate TOP LEFT
5	-21	y-coordinate TOP LEFT
6	0	x-coordinate TOP RIGHT
7	-21	y-coordinate TOP RIGHT
ed48

THE VERTICES OF THE VIRTUAL RECTANGLE OF TEXT
key	COORDINATE	MEANING
0	30	x-coordinate LOWER LEFT
1	280	y-coordinate LOWER LEFT
2	175	x-coordinate LOWER RIGHT
3	280	y-coordinate LOWER RIGHT
4	175	x-coordinate TOP LEFT
5	259	y-coordinate TOP LEFT
6	30	x-coordinate TOP RIGHT
7	259	y-coordinate TOP RIGHT
ed48