imagecreatefromstring

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

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

示例 #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：

Output of example : imagecreatefromstring()

参见