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PHP picture saved in MySQL database failed solution

Source: Internet
Author: User
Tags base64 fread php file mysql database phpmyadmin
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The code is as follows Copy Code

Require ' class/db.php ';
$fileName = "A1.jpg";
$fp = fopen ($fileName, "R");

$img = Fread ($fp, FileSize ($fileName));
Fclose ($FP);

$db->execute ("Insert db2.testimg (' img ') VALUES (' $img ');");

Error
You have a error in your SQL syntax; Check the manual that corresponds to your MySQL server version for the right syntax to use near '? Shou Q? 仳!??? ? 1, >,mo? ' ^wz4in?? T Spring?????? U-ying/? ' at line 1

The code is as follows Copy Code

$img = Fread ($fp, FileSize ($fileName));
$img = Addslashes ($img)

Continue with the error

All kinds of search, Baidu's results are addslashes, or addslashes is not. That's ridiculous.

Base64_decode

$img = Base64_encode ($img);
Insert succeeded. Picture file 17.0k

Come out for Base64_decode, show normal

Find a way to get into the 16 system.
$img = Bin2Hex ($img);
Valid, the output is not decrypted. The database is very large 25K. than the base64 also pit dad.

Look again.

Later, later. found that phpMyAdmin directly uploaded picture files can be used in files smaller than base64. File 12.8k

Turn phpMyAdmin Source code
common.lib.php file 183 has a magical function.

The code is as follows Copy Code

function pma_sqladdslashes ($a _string = ', $is _like = False, $crlf = False, $php _code = False)
{
if ($is _like) {
$a _string = str_replace (' \ ', ' \\\\ ', $a _string);
} else {
$a _string = str_replace (' \ ', ' \ n ', $a _string);
}

if ($CRLF) {
$a _string = Str_replace ("n", ' n ', $a _string);
$a _string = Str_replace ("R", ' R ', $a _string);
$a _string = Str_replace ("T", ' t ', $a _string);
}

if ($php _code) {
$a _string = Str_replace (', ', '), $a _string);
} else {
$a _string = Str_replace ("," ", $a _string);
}

return $a _string;
}//End of the ' pma_sqladdslashes () ' function$img = Pma_sqladdslashes ($img);

The file size is 12.8K as large as phpMyAdmin.

Cases

Front desk (image.html):

The code is as follows Copy Code

<title> Upload Pictures </title>

<body>
<form method= "POST" action= "upimage.php" enctype= "Multipart/form-data" >
<input type= "hidden" value= "204800" name= "max_file_size"/>
File: <input type= "file" name= "Imgfile"/>
<input type= "Submit" value= "OK" name= "submitbtn" style= "width:100px;height:23px"/></center>
</form>
</body>

Background processing (upimage.php):

The code is as follows Copy Code

<?php
Insert a picture into the database
$imgfile =$_files[' Imgfile '];
$submitbtn =$_post[' submitbtn '];
if ($submitbtn = = ' OK ' and Is_array ($imgfile)) {
$name = $imgfile [' name ']; Get Picture Name
$type = $imgfile [' type ']; Get Picture Type
$size = $imgfile [' Size ']; Get picture length
$tmpfile = $imgfile [' Tmp_name ']; Picture upload on the path to the temp file
if ($tmpfile and Is_uploaded_file ($tmpfile)) {//To determine if the upload file is empty, file is not uploaded file
Reading a picture stream
$file =fopen ($tmpfile, "RB");
$imgdata =bin2hex (Fread ($file, $size)); Bin2Hex () converts binary data to hexadecimal representation
Fclose ($file);

$mysqli =mysql_connect ("localhost", "root", "123456″"); Connect database functions
mysql_select_db ("test"); Select Database
Insert a database statement, the picture data to be preceded by 0x, used to indicate the number of 16
if (mysql_query insert into images (name,type,image) VALUES ('. $name. "', '". $type. "', 0x". $imgdata. "))
echo <center> Insert Success! <br><br><a href= ' disimage.php ' > show Picture </a></center>;
Else
echo "<center> Insert failed! </center> ";
Mysql_close ();
}else
echo <center> Please select the picture First! <br><br><a href= ' image.html ' > Point this return </a></center> ";
} else
echo <center> Please select the picture First! <br><br><a href= ' image.html ' > Point this return </a></center> ";
?>

Show Picture (disimage.php):

The code is as follows Copy Code

<?php
mysql_connect ("localhost", "root", "123456″");
mysql_select_db ("test");
Show the latest inserted picture
$result =mysql_query ("Select image from Images where id= (select Max (ID) from images)");
$row =mysql_fetch_object ($result);
Header ("Content-type:image/pjpeg");
Echo $row->image;
Mysql_close ();
?>


Conclusion

Pma_sqladdslashes file 12.8k as big as the original picture
Bin2Hex 16 Easy to use file 25K
Base64_encode easy to use, out of the file needs Base64_decode 17K
Addslashes is not good, continue to error (note: On some windows machine addslashes easy to use)

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Related Keywords:
how to connect mysql database in php how to create mysql database in php connecting to mysql database in php how to query mysql database in php how to create database in php mysql multiple file upload in php mysql database upload image in php mysql database example
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