imagegif
(PHP 4, PHP 5)
imagegif — Output image to browser or file
설명
imagegif() creates the GIF file in filename from the image image . The image argument is the return from the imagecreate() or imagecreatefrom* function.
The image format will be GIF87a unless the image has been made transparent with imagecolortransparent(), in which case the image format will be GIF89a.
매개변수
- font
-
내장 글꼴 1, 2, 3, 4, 5(큰 숫자가 큰 글꼴)나 imageloadfont()로 등록한 글꼴 식별자를 사용할 수 있습니다.
- filename
-
The path to save the file to. If not set or NULL, the raw image stream will be outputted directly.
반환값
성공할 경우 TRUE를, 실패할 경우 FALSE를 반환합니다.
주의
Note: Since all GIF support was removed from the GD library in version 1.6, this function is not available if you are using that version of the GD library. Support is expected to return in a version subsequent to the rerelease of GIF support in the GD library in mid 2004. For more information, see the » GD Project site.
The following code snippet allows you to write more portable PHP applications by auto-detecting the type of GD support which is available. Replace the sequence header ("Content-type: image/gif"); imagegif ($im); by the more flexible sequence:<?php
if (function_exists("imagegif")) {
header("Content-type: image/gif");
imagegif($im);
} elseif (function_exists("imagejpeg")) {
header("Content-type: image/jpeg");
imagejpeg($im, "", 0.5);
} elseif (function_exists("imagepng")) {
header("Content-type: image/png");
imagepng($im);
} elseif (function_exists("imagewbmp")) {
header("Content-type: image/vnd.wap.wbmp");
imagewbmp($im);
} else {
die("No image support in this PHP server");
}
?>
Note: As of version 3.0.18 and 4.0.2 you can use the function imagetypes() in place of function_exists() for checking the presence of the various supported image formats:
<?php
if (imagetypes() & IMG_GIF) {
header ("Content-type: image/gif");
imagegif ($im);
} elseif (imagetypes() & IMG_JPG) {
/* ... etc. */
}
?>