Php/docs/function.imagecreatefromstring
imagecreatefromstring
(PHP 4 >= 4.0.4, PHP 5, PHP 7)
imagecreatefromstring — 从字符串中的图像流新建一图像
说明
imagecreatefromstring
( string $image
) : resource
imagecreatefromstring() 返回一个图像标识符,其表达了从给定字符串得来的图像。图像格式将自动检测,只要 PHP 支持:JPEG,PNG,GIF,WBMP 和 GD2。
参数
image
- A string containing the image data.
返回值
An image resource will be returned on success. false
is returned if
the image type is unsupported, the data is not in a recognised format,
or the image is corrupt and cannot be loaded.
范例
Example #1 imagecreatefromstring() example
<?php$data = 'iVBORw0KGgoAAAANSUhEUgAAABwAAAASCAMAAAB/2U7WAAAABl' . 'BMVEUAAAD///+l2Z/dAAAASUlEQVR4XqWQUQoAIAxC2/0vXZDr' . 'EX4IJTRkb7lobNUStXsB0jIXIAMSsQnWlsV+wULF4Avk9fLq2r' . '8a5HSE35Q3eO2XP1A1wQkZSgETvDtKdQAAAABJRU5ErkJggg==';$data = base64_decode($data);$im = imagecreatefromstring($data);if ($im !== false) { header('Content-Type: image/png'); imagepng($im); imagedestroy($im);}else { echo 'An error occurred.';}?>
以上例程的输出类似于:
参见
- imagecreatefromjpeg() - 由文件或 URL 创建一个新图象。
- imagecreatefrompng() - 由文件或 URL 创建一个新图象。
- imagecreatefromgif() - 由文件或 URL 创建一个新图象。
- imagecreatetruecolor() - 新建一个真彩色图像