imagettftext
(PHP 4, PHP 5)
imagettftext — Write text to the image using TrueType fonts
Описание
array imagettftext
( resource $image
, float $size
, float $angle
, int $x
, int $y
, int $color
, string $fontfile
, string $text
)
Список параметров
-
image
-
An image resource, returned by one of the image creation functions,
such as imagecreatetruecolor().
-
size
-
The font size. Depending on your version of GD, this should be
specified as the pixel size (GD1) or point size (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 x
and
y
will define the basepoint of the first
character (roughly the lower-left corner of the character). This
is different from the imagestring(), where
x
and y
define 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
fontfile
does 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 as of PHP 5.2.0.
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 (html_entity_decode()
supports this as of PHP 5.0.0).
If a character is used in the string which is not supported by the
font, a hollow rectangle will replace the character.
Возвращаемые значения
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.
Примеры
Пример #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);
?>
Результатом выполнения данного примера
будет что-то подобное:
Примечания
Замечание:
This function requires both the GD library and the » FreeType library.
