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# imagepng

(PHP 4, PHP 5)

imagepng — Output a PNG image to either the browser or a file

### 설명

bool imagepng ( resource `$image` [, string `$filename` [, int `$quality` [, int `$filters` ]]] )

Outputs or saves a PNG image from the given `image` .

### 인수

`image`

  imagecreatetruecolor() 등의 이미지 생성 함수에서 반환한 이미지 자원.

`filename`

  The path to save the file to. If not set or `NULL`, the raw image stream will be outputted directly.

  > Note: `NULL` is invalid if the `quality` and `filters` arguments are not used.

`quality`

  Compression level: from 0 (no compression) to 9.

`filters`

  Allows reducing the PNG file size. It is a bitmask field which may be set to any combination of the PNG_FILTER_XXX constants. `PNG_NO_FILTER` or `PNG_ALL_FILTERS` may also be used to respectively disable or activate all filters.

### 반환값

성공할 경우 `TRUE`를, 실패할 경우 `FALSE`를 반환합니다.

### 변경점

버전 | 설명
--- | ---
5.1.3 | Added the `filters` parameter.
5.1.2 | Added the `quality` parameter.

### 예제

`<?php
$im = imagecreatefrompng("test.png");
header('Content-type: image/png');
imagepng($im);
imagedestroy($im);
?>`

### 참고

- imagegif() - Output image to browser or file
- imagewbmp() - Output image to browser or file
- imagejpeg() - Output image to browser or file
- imagetypes() - Return the image types supported by this PHP build
- imagesavealpha() - Set the flag to save full alpha channel information (as opposed to single-color transparency) when saving PNG images

imagepalettecopy
imagepolygon
GD and Image 함수 목록
PHP Manual