php - fit text on text-to-image - php

Question

I have this code
<?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... a very long text';
// 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);
?>
the problem here is, when I have a very long text, the other won't show.
I've searched that it can be done by
imagettfbbox()
but I don't know how to apply it here.
Any help?

Answer 1

try this code:
<?php
// Set the content-type
header('Content-type: image/png');
$img_width = 400;
$img_height = 30;
// Create the image
$im = imagecreatetruecolor($img_width, $img_height);
// 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, $img_width, $img_height, $white);
// The text to draw
$text = 'Testing... a very long text bla.. ';
// Replace path by your own font path
$font = 'arial.ttf';
$fontSize = $img_width / strlen($text) * 1.8;
// Add some shadow to the text
imagettftext($im, $fontSize, 0, 11, 21, $grey, $font, $text);
// Add the text
imagettftext($im, $fontSize, 0, 10, 20, $black, $font, $text);
// Using imagepng() results in clearer text compared with imagejpeg()
imagepng($im);
imagedestroy($im);
?>
New update code :
<?php
// Set the content-type
header('Content-type: image/png');
$img_width = 400;
$img_height = 30;
$font = 'arial.ttf';
// Create the image
$text = 'Testing... a very long text.. Testing... a very long text.. Testing... a very long text.. Testing... a very long text..';
$curTextLen = strlen($text);
$limit = 35;
$totalLine = ceil($curTextLen / $limit);
$img_height = $img_height * $totalLine;
$im = imagecreatetruecolor($img_width, $img_height);
$white = imagecolorallocate($im, 255, 255, 255);
$grey = imagecolorallocate($im, 128, 128, 128);
$black = imagecolorallocate($im, 0, 0, 0);
imagefilledrectangle($im, 0, 0, $img_width, $img_height, $white);
for($i = 1; $i <= $totalLine; $i++){
$y = $i * 27;
$textN = substr($text,($limit * ($i-1)),$limit);
imagettftext($im, 20, 0, 11, $y, $grey, $font, $textN);
// Add the text
imagettftext($im, 20, 0, 10, $y, $black, $font, $textN);
}
// Using imagepng() results in clearer text compared with imagejpeg()
imagepng($im);
imagedestroy($im);
?>