PHP Conference China 2020


(PHP 4, PHP 5)

imagepstextPostScript Type1 yazı tiplerini kullanarak bir resmin üzerine bir metin çizer


imagepstext ( resource $resim , string $metin , resource $font_indisi , int $boyut , int $önalan , int $artalan , int $x , int $y [, int $boşluk = 0 [, int $sıkışıklık = 0 [, float $açı = 0.0 [, int $yumuşatma_adımları = 4 ]]]] ) : array

PostScript Type1 yazı tiplerini kullanarak bir resmin üzerine bir metin çizer.

Bu işlevin nasıl çalıştığını anlamak için PostScript belgelerinde yazı tiplerini ve bunların ölçü sistemlerini inceleyin.



imagecreatetruecolor() gibi bir resim oluşturma işlevinden dönen bir resim verisi.


Yazılacak metin.


imagepsloadfont() tarafından döndürülen bir yazı tipi özkaynağı.


Piksel cinsinden yazı tipi yüksekliği.


Metni boyamakta kullanılacak renk.


Yumuşatma amacıyla metin rengine yedirilecek renk. Bu renk ile aslında resmin artalanı boyanmaz. Dolayısıyla resmin artalanının ışık geçirmeyen bir renkte olması gerekli değildir.


İlk karakterin sol alt köşesinin X konumu.


İlk karakterin sol alt köşesinin Y konumu.


Bir yazı tipi içindeki bir boşluğun öntanımlı değerini belirtmek için kullanılır. Bu miktar normal değere eklenir ve negatif olabilir. Bir em karenin binde birine eşit karakter boşluk birimi cinsinden belirtilir.


Karakterler arasındaki boşluk miktarını belirtmek için kullanılır. Bu miktar normal karakter genişliğine eklenir ve negatif olabilir. Bir em karenin binde birine eşit karakter boşluk birimi cinsinden belirtilir.


Derece olarak açı.


Karakter kenarlarının yumuşatılması için kullanılacak renk sayısını belirleminizi sağlar. İzin verilen değerler 4 ve 16'dır. Metin kalitesine etkisi belirgin olan daha yüksek değerler 20'den küçük metin boyutları için önerilmektedir. Daha büyük boyutlar için 4 kullanın. Daha az hesap gerektirir.

Dönen Değerler

İşlev aşağıdaki elemanları içeren bir dizi döndürür:

0 sol alt köşenin X konumu
1 sol alt köşenin Y konumu
2 sağ üst köşenin X konumu
3 sağ üst köşenin Y konumu


Örnek 1 - imagepstext() örneği

// Resmi oluşturalım
$im imagecreatetruecolor(200200);

// Renleri belirleyelim
$black imagecolorallocate($im000);
$white imagecolorallocate($im255255255);

// PostScript Yazıtipi
$font imagepsloadfont('font.pfm');

// Metni resme yazalım
imagepstext($im'Sample text is simple'$font12$black$white5050);

// Resmi çıktılayıp belleği serbest bırakalım
header('Content-type: image/png');



Bilginize: Bu işlev sadece, PHP, --with-t1lib[=DİZİN] seçeneği ile derlenmişse kullanılabilir.

Ayrıca Bakınız

  • imagepsbbox() - Bir PostScript Type1 yazı tipi ile yazılan bir metnin çerçevesini döndürür

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User Contributed Notes 12 notes

chrislewis60 at hotmail dot com
13 years ago
imagepstext() appears to be quite memory intensive and we had a problem where about 50% of the time the script would error. You need to make sure PHP has enough memory assigned to it - we had to increase PHP's allocation from 8MB to 16MB for a simple "hello world" example to work smoothly.

If the png header was commented out it would sometimes error with a message like:

Warning: imagepstext() [function.imagepstext]: T1Lib Error 11 or 14

and if the png header was there it would sometimes say:

The image [...] cannot be displayed, because it contains errors.
soletan at toxa dot de
10 years ago
As of PHP 5.2.13 with bundled GD (2.0.34) antialiasing_steps mustn't be "4 to 16", but "4 or 16". Values from 5 to 15 result in a warning.
honza dot bartos at gmail dot com
13 years ago
The coordinates given by x, y represent actually a starting point of the text baseline. They represent the lower left corner of the first character only in case that any part of the character doesn't lie below baseline (it works for "Hello" but for "Howdy" it does not - because of letter y). There may be some small differences according to the font and size chosen.
johan (at)
17 years ago
If you use fonts with special chars, remeber to read in the encoded file *.enc with imagepsencodefont ... etc. for Danish, Swedish, German.....
a at url dot de
18 years ago
a note on kernnig:
t1lib tries to load a corresponding afm file in the directory of the font file.
it does this by replacing the extension (.PFB .pfb) with ".afm". note that this has to be a lowercase afm! usually windows-ps-fonts have file names in all-uppercase, so try renaming the *.AFM file to *.afm.

i also noticed that sometimes this gives an error -2. it seems like t1lib chokes on windows-linebreaks in the afm file.

try 'recode dos..lat1 fontfile.afm' and check again.

if it all works, combinations like "Ta" or "Te" should show the second letter slightly moved to the capital T (on normal fonts like Times anyway).
npdavis at hotmail dot com
19 years ago
If you have a programming error in your code, using ImagePsText, sometimes t1lib crashes with an unrecoverable error. Because of this, httpd needs to be restarted.

This problem only occurs if there is a programming error, but can drive you crazy when debugging, if you don't know about it. By killing the parent process(httpd) you "reset" t1lib. When debugging, if you get an error then make a code change, restart httpd before testing it again. This will save hours of frustration. Make it a habit to just restart httpd after every error, and you will be much happier.

Also, to see debugging messages, (if you are rendering x's) comment the jpeg header, and the ImageJpeg statement. You will get beautiful error messages. When you get a blank page, your ImagePsText code is working correctly. Uncomment the Header() and ImageJpeg() and see what you have. You might be passing parameters that render a white image with no text, but the code is working!

Numeric t1lib error messages can be decoded using the t1lib_doc.pdf file that comes with t1lib. PHP simply relays these errors from t1lib to the page. Please don't ask the PHP people about these errors... t1lib has beautiful documentation.... use it: )

heckp at
17 years ago
It is important so make shure that the "text" really is a string.

imagepstext ($im, $text, $font, $textsize, $black, $white, 10, 10);

won't work if $text is undefined, so PHP will quit with an error.

so always write it like this:

imagepstext ($im, "$text", $font, $textsize, $black, $white, 10, 10);
npdavis at hotmail dot com
19 years ago
One other thing... variables. It is important to convert variables to the proper type before they hit this function. In this respect, ImageTtfText is easier to work with. IE, if you pass a font size from one page to the next, via GPC, it becomes a string type. Sooo... use IntVal() to convert it to an integer type that ImagePsText can digest. In addition you must convert HTML special characters or use chr() to represent special characters. ImagePsFont will not decode   to represent a space, use Chr(32) or a space:

ImagePsText($im, $textstring, $font, $fontsize, $textcolor, $background, 0, $fontsize,'','','',16); //note antialias is set

17 years ago
I found a way to let imagepstext understand 32-bit colors (RGBA) by replacing in gd.c:PHP_FUNCTION(imagepstext)

int _fg, _bg, x, y, size, space = 0, aa_steps = 4, width = 0;


unsigned int _fg, _bg, x, y, size, space = 0, aa_steps = 4, width = 0;
whitemarker dot blogspot dot com
13 years ago
The documentation above is bad.  It says $font:
"Can be 1, 2, 3, 4, 5 for built-in fonts in latin2 encoding (where higher numbers corresponding to larger fonts) or any of your own font identifiers registered with imageloadfont()."

But it can't.  When I put in 1,2,3,4,5 I get
"Warning: imagepstext() expects parameter 3 to be resource, integer given"

I get the same thing when using imageloadfont() because imageloadfont() also returns an integer.  The documentation should instead say:
"resource returned from imagepsloadfont()."
npdavis at hotmail dot com
19 years ago
with a font included in t1lib:

("Content-type: image/jpeg");
$im = ImageCreate (350, 45);
$black = ImageColorAllocate ($im, 0, 0, 0);
$white = ImageColorAllocate ($im, 255, 255, 255);
ImagePsText($im, "Testing... It worked!",
$font, 32, $white, $black, 32, 32);
ImageJpeg($im, "", 100);//for best quality... your mileage may vary
ImageDestroy ($im);

Better than using freetype, but with freetype2, the difference is marginal. To flip backround and foreground colors, alternate the order of ImageColorAllocate statements.

If you get outlines (the antialiasing produces these) reverse the $black and $white color identifiers in the ImagePsText function.

Happy PostScripting!

Jeroen dot Straahof at newego dot nl
17 years ago
I made a function that makes it easy to align text to the right
of an image. Below you can find the code because for me it
works great. You can also use it to center text as well, if you
like to have that simply remove the -10 and split the result
of $imgwidth and $texwidth

function AlignRight($string, $font, $imgwidth, $fontsize) {
list($lx,$ly,$rx,$ry) = imagepsbbox($string,$font,$fontsize,0,0,0);
$textwidth = $rx - $lx;
$imw = ($imgwidth-10-$textwidth);
return $imw;
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