imagecreatefromstring — 从字符串中的图像流新建一图像

2018-04-18 20:50:42
linefo
451
最后编辑:linefo 于 2018-04-18 21:00:32

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

resource imagecreatefromstring ( string $image )

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:

Output of example : imagecreatefromstring()

参见