Php/docs/function.imagecreatefromstring

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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