imagettftext
(PHP 4, PHP 5)
imagettftext — Write text to the image using TrueType fonts
Descrizione
$image
, float $size
, float $angle
, int $x
, int $y
, int $color
, string $fontfile
, string $text
)
Writes the given text into the image using TrueType
fonts.
Elenco dei parametri
-
image -
Una risorsa immagine, restituita da una delle funzioni di creazione immagine, come imagecreatetruecolor().
-
size -
La dimensione del carattere. A seconda della versione di GD, deve essere specificata in pixel (GD1) o in punti (GD2).
-
angle -
The angle in degrees, with 0 degrees being left-to-right reading text. Higher values represent a counter-clockwise rotation. For example, a value of 90 would result in bottom-to-top reading text.
-
x -
The coordinates given by
xandywill define the basepoint of the first character (roughly the lower-left corner of the character). This is different from the imagestring(), wherexandydefine the upper-left corner of the first character. For example, "top left" is 0, 0. -
y -
The y-ordinate. This sets the position of the fonts baseline, not the very bottom of the character.
-
color -
The color index. Using the negative of a color index has the effect of turning off antialiasing. See imagecolorallocate().
-
fontfile -
The path to the TrueType font you wish to use.
Depending on which version of the GD library PHP is using, when
fontfiledoes not begin with a leading / then .ttf will be appended to the filename and the library will attempt to search for that filename along a library-defined font path.When using versions of the GD library lower than 2.0.18, a space character, rather than a semicolon, was used as the 'path separator' for different font files. Unintentional use of this feature will result in the warning message: Warning: Could not find/open font. For these affected versions, the only solution is moving the font to a path which does not contain spaces.
In many cases where a font resides in the same directory as the script using it the following trick will alleviate any include problems.
<?php
// Set the enviroment variable for GD
putenv('GDFONTPATH=' . realpath('.'));
// Name the font to be used (note the lack of the .ttf extension)
$font = 'SomeFont';
?> -
text -
The text string in UTF-8 encoding.
May include decimal numeric character references (of the form: €) to access characters in a font beyond position 127. The hexadecimal format (like ©) is supported. Strings in UTF-8 encoding can be passed directly.
Named entities, such as ©, are not supported. Consider using html_entity_decode() to decode these named entities into UTF-8 strings.
If a character is used in the string which is not supported by the font, a hollow rectangle will replace the character.
Valori restituiti
Returns an array with 8 elements representing four points making the
bounding box of the text. The order of the points is lower left, lower
right, upper right, upper left. The points are relative to the text
regardless of the angle, so "upper left" means in the top left-hand
corner when you see the text horizontally.
Returns FALSE on error.
Log delle modifiche
| Versione | Descrizione |
|---|---|
| 5.2.0 |
It is now possible to specify an hexadecimal entity in
text.
|
Esempi
Example #1 imagettftext() example
This example script will produce a white PNG 400x30 pixels, with the words "Testing..." in black (with grey shadow), in the font Arial.
<?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...';
// 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);
?>
Il precedente esempio visualizzerà qualcosa simile a:
Note
Nota:
This function requires both the GD library and the » FreeType library.