imageftbbox

(PHP 4 >= 4.0.7, PHP 5, PHP 7)

imageftbboxGive the bounding box of a text using fonts via freetype2

Beschreibung

imageftbbox ( float $size , float $angle , string $fontfile , string $text [, array $extrainfo ] ) : array

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

Hinweis:

imageftbbox() is an extended variant of imagettfbbox() which additionally supports the extrainfo.

Parameter-Liste

size

Die Schriftgröße in Punkten.

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.

extrainfo

Possible array indexes for extrainfo
Key Type Meaning
linespacing float Defines drawing linespacing

Rückgabewerte

imageftbbox() 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.

Beispiele

Beispiel #1 imageftbbox() example

<?php
// Create a 300x150 image
$im imagecreatetruecolor(300150);
$black imagecolorallocate($im000);
$white imagecolorallocate($im255255255);

// Set the background to be white
imagefilledrectangle($im00299299$white);

// Path to our font file
$font './arial.ttf';

// First we create our bounding box
$bbox imageftbbox(100$font'The PHP Documentation Group');

// This is our cordinates for X and Y
$x $bbox[0] + (imagesx($im) / 2) - ($bbox[4] / 2) - 5;
$y $bbox[1] + (imagesy($im) / 2) - ($bbox[5] / 2) - 5;

imagefttext($im100$x$y$black$font'The PHP Documentation Group');

// Output to browser
header('Content-Type: image/png');

imagepng($im);
imagedestroy($im);
?>

Anmerkungen

Hinweis: Diese Funktion ist nur verfügbar wenn PHP mit Freetype unterstützung (--with-freetype-dir=DIR) kompiliert wurde

Siehe auch

  • imagefttext() - Write text to the image using fonts using FreeType 2
  • imagettfbbox() - Ermittle das umgebende Rechteck eines Textes unter Verwendung von True-Type Schriftarten

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