imagepng
(PHP 4, PHP 5)
imagepng — Output a PNG image to either the browser or a file
說明
bool imagepng
( resource $image
[, string $filename
[, int $quality
[, int $filters
]]] )
Outputs or saves a PNG image from the given image .
參數
- image
-
An image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
- 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.
Return值
如果成功則回傳 TRUE，失敗則回傳 FALSE。
更新日誌
| 版本 | 說明 |
|---|---|
| 5.1.3 | Added the filters parameter. |
| 5.1.2 | Added the quality parameter. |
範例
<?php
$im = imagecreatefrompng("test.png");
imagepng($im);
?>