imagettfbbox
imagettfbbox
(PHP 4, PHP 5, PHP 7)
imagettfbbox — Give the bounding box of a text using TrueType fonts
Description
array imagettfbbox ( float $size , float $angle , string $fontfile , string $text )
This function calculates and returns the bounding box in pixels for a TrueType text.
Parameters
-
size -
The font size.
Note: In GD 1, this is measured in pixels. In GD 2, this is measured in points.
-
angle -
Angle in degrees in which
textwill be measured. -
fontfile -
The name of the TrueType font file (can be a URL). Depending on which version of the GD library that PHP is using, it may attempt to search for files that do not begin with a leading '/' by appending '.ttf' to the filename and searching along a library-defined font path.
-
text -
The string to be measured.
Return Values
imagettfbbox() returns an array with 8 elements representing four points making the bounding box of the text on success and FALSE on error.
| key | contents |
|---|---|
| 0 | lower left corner, X position |
| 1 | lower left corner, Y position |
| 2 | lower right corner, X position |
| 3 | lower right corner, Y position |
| 4 | upper right corner, X position |
| 5 | upper right corner, Y position |
| 6 | upper left corner, X position |
| 7 | upper left corner, Y position |
The points are relative to the text regardless of the angle, so "upper left" means in the top left-hand corner seeing the text horizontally.
Examples
Example #1 imagettfbbox() example
<?php
// Create a 300x150 image
$im = imagecreatetruecolor(300, 150);
$black = imagecolorallocate($im, 0, 0, 0);
$white = imagecolorallocate($im, 255, 255, 255);
// Set the background to be white
imagefilledrectangle($im, 0, 0, 299, 299, $white);
// Path to our font file
$font = './arial.ttf';
// First we create our bounding box for the first text
$bbox = imagettfbbox(10, 45, $font, 'Powered by PHP ' . phpversion());
// This is our cordinates for X and Y
$x = $bbox[0] + (imagesx($im) / 2) - ($bbox[4] / 2) - 25;
$y = $bbox[1] + (imagesy($im) / 2) - ($bbox[5] / 2) - 5;
// Write it
imagettftext($im, 10, 45, $x, $y, $black, $font, 'Powered by PHP ' . phpversion());
// Create the next bounding box for the second text
$bbox = imagettfbbox(10, 45, $font, 'and Zend Engine ' . zend_version());
// Set the cordinates so its next to the first text
$x = $bbox[0] + (imagesx($im) / 2) - ($bbox[4] / 2) + 10;
$y = $bbox[1] + (imagesy($im) / 2) - ($bbox[5] / 2) - 5;
// Write it
imagettftext($im, 10, 45, $x, $y, $black, $font, 'and Zend Engine ' . zend_version());
// Output to browser
header('Content-Type: image/png');
imagepng($im);
imagedestroy($im);
?> Notes
Note: This function is only available if PHP is compiled with freetype support (--with-freetype-dir=DIR )
See Also
- imagettftext() - Write text to the image using TrueType fonts
- imageftbbox() - Give the bounding box of a text using fonts via freetype2
© 1997–2017 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://secure.php.net/manual/en/function.imagettfbbox.php
