在PHP中显示来自PostgreSQL数据库的图像 [英] Display image from PostgreSQL database in PHP
本文介绍了在PHP中显示来自PostgreSQL数据库的图像的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想在PHP文件中显示来自PostgreSQL数据库的图像. 在尝试了许多不同的可能性之后,我走的并不远. 这是我的工作:
I want to display an image from my PostgreSQL database in a PHP file. After trying a lot of different possibilities, I don't get very far. Here is what I do:
上传:
echo "<div>".
"<table border=\"1\" cellpadding=\"3\">".
"<form action=\"test2.php\" method=\"post\" enctype=\"multipart/form-data\">".
"<tr>".
"<td>".
"<input type=\"file\" name=\"file\" id=\"file\">".
"<input class=\"button\" type=\"submit\" name=\"submit\" value=\"Submit\">".
"<tr>".
"</tr>".
"</form>".
"</table>".
"</div>";
显示:
if(isset($_FILES['file'])) //file uploaded
{
$file_raw = file_get_contents($_FILES['file']['tmp_name']);
$file = pg_escape_bytea($file_raw);
//Here is Code to insert into Database but just to test, I try it directly:
header('Content-Type: image/png');
echo pg_unescape_bytea($file);
}
我已经在一个额外的文件中包含了显示部分,依此类推,但这是您需要了解的基本信息.
I already have the display part in an extra file and so on, but these are the essential information you need to know.
我不会显示任何图像,只是从浏览器显示此残破图像"图标. 这是怎么了我该如何解决? 谢谢!
I wont get any image displayed, just this "Broken Image" icon from the browser. What is wrong here? How can I solve this? Thank you!
推荐答案
简单处理:
Simple handling:
<?php
// Connect to the database
$dbconn = pg_connect( 'dbname=foo' );
// Read in a binary file
$data = file_get_contents( 'image1.jpg' );
// Escape the binary data to avoid problems with encoding
$escaped = bin2hex( $data );
// Insert it into the database
pg_query( "INSERT INTO gallery (name, data) VALUES ('Pine trees', decode('{$escaped}' , 'hex'))" );
// Get the bytea data
$res = pg_query("SELECT encode(data, 'base64') AS data FROM gallery WHERE name='Pine trees'");
$raw = pg_fetch_result($res, 'data');
// Convert to binary and send to the browser
header('Content-type: image/jpeg');
echo base64_decode($raw);
?>
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