(PHP 4, PHP 5, PHP 7)

imagecreatefrompngBir dosya veya URL'den yeni bir resim oluşturur.


resource imagecreatefrompng ( string $dosyaismi )

imagecreatefrompng() işlevi dosya ismi verilen resmi betimleyen bir resim tanıtıcısı döndürür.


fopen sarmalayıcıları etkin kılınmışsa bu işlevde dosya ismi olarak bir URL belirtebilirsiniz. Dosya isminin nasıl belirtilebileceği hakkında bilgi edinmek için fopen() işlevine bakınız. Sarmalayıcıların neler yapabildiği, kullanım bilgileri ve bunlar tarafından kullanılan öntanımlı değişkenler hakkında bilgi edinmek için ise Supported Protocols and Wrappers bölümüne bakınız.



PNG resmin dosya yolu.

Dönen Değerler

Başarı durumunda resim dosya tanıtıcısı, hata durumunda FALSE döner.


Örnek 1 - Bir PNG yüklerken oluşan bir hatanın ele alınması

function PNGyükle($resimismi)
/* Resmi açmaya çalışalım */
$im = @imagecreatefrompng($resimismi);

/* Başarılı oldu mu bakalım */
/* Boş bir resim oluşturalım */
$im  imagecreatetruecolor (2020);
$bgc imagecolorallocate($im255255255);
$tc  imagecolorallocate($im000);


/* Hata iletisini çıktılayalım */
imagestring($im155'Error loading ' $imgname$tc);


header('Content-Type: image/png');

$img PNGyükle('bozuk.resim');


Yukarıdaki örnek şuna benzer bir çıktı üretir:

imagecreatefrompng() örneği
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User Contributed Notes 6 notes

13 years ago
If you're trying to load a translucent png-24 image but are finding an absence of transparency (like it's black), you need to enable alpha channel AND save the setting. I'm new to GD and it took me almost two hours to figure this out.

= imageCreateFromPng($strImagePath);
imageAlphaBlending($imgPng, true);
imageSaveAlpha($imgPng, true);

/* Output image to browser */
header("Content-type: image/png");
marcos at assl-site dot net
11 years ago
I had the same problem as jboyd1189 at yahoo dot com but I solve d it allocating more memory dynamically.

Usually the memory_limit var on php.ini is set to 8M. Unfortunately, the required amount of memory to manage a PNG image about 1000x1000 could be bigger !

The approach I used to solve the problem is:

1-Calculate the memory required by the image
2-Set the new memory_limit value
3-Create the PNG image and thumbnail
4-Restore the original value

1-The following value works for me:
$required_memory = Round($width * $height * $size['bits']);

Note that for JPEG the requirements are not the same:

2-Use somthing like:
$new_limit=memory_get_usage() + $required_memory;
ini_set("memory_limit", $new_limit);

4-ini_restore ("memory_limit");
admin at wdfa dot co dot uk
9 years ago
When using imagecreatepng with alpha blending you will lose the blending.

To over come this use something like the following
imagecopyresampled($dstimage,$srcimage,0,0,0,0, $width,$height,$width,$height);
Where $width and $height are the width and height of the $src image.

This will create a true colour image then copy the png image to this true colour image and retain alpha blending.
katalin at knittedforyou dot com
6 months ago
I have this code:

if (exif_imagetype($this->img_name) == IMAGETYPE_PNG) {
                try {
                    $this->image = imagecreatefrompng($this->img_name);
                    Error::log('It is a png: '.$this->img_name);
                } catch (Exception $e) {
                    echo "The image file has some strange charachters. Probably not a png image?";
                    $this->image = '';
                    $this->img_name = '';

And I get this error in the error.log:
PHP Unknown error:  imagecreatefrompng(): gd-png: fatal libpng error: Extra compressed data\n in Unknown on line 0

The file that I try to open is a generated .png image which I can open from gimp and Geeqie.

What is the problem? Could you please help me?
jboyd1189 at yahoo dot com
11 years ago
I was having a terrible time with the imagecreatefrompng function as it was working perfectly for one image and not at all for another.  After many hours of frustration, I discovered that the problem was the image size (number of pixels).  It appears that the maximum number of pixels this function will process is 1,040,000.  So, be sure that the pixel resolution of the image (eg. 1040 x 1000) does not exceed this value.
2 years ago
The image size (width x height) should not exceed INT_MAX ... It's still thrue on a 64 bits computer.
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