imagetruecolortopalette
imagettftext
GD and Image Funkcje
PHP Manual

# imagettfbbox

(PHP 4, PHP 5)

imagettfbbox — Give the bounding box of a text using TrueType fonts

### Opis

array imagettfbbox ( float `$size` , float `$angle` , string `$fontfile` , string `$text` )

This function calculates and returns the bounding box in pixels for a TrueType text.

### Parametry

`size`

  The font size. Depending on your version of GD, this should be specified as the pixel size (GD1) or point size (GD2).

`angle`

  Angle in degrees in which `text` will 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.

### Zwracane wartości

imagettfbbox() returns an array with 8 elements representing four points making the bounding box of the text:

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.

### Przykłady

Przykład #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);
?>`

### Notatki

> Informacja: This function requires both the GD library and the » FreeType library.

### Zobacz też:

- imagettftext() - Write text to the image using TrueType fonts

imagetruecolortopalette
imagettftext
GD and Image Funkcje
PHP Manual