Question

I have some images in a mysql database stored as BLOB’s.

The maximum file size of the images is 5MB.

I am trying to create thumbnails of the images, using php GD.

I am using the script below:

include 'models/connectdb.php';

// ------ starting up ------ //

$directory = 'views/images/generated/events/xs/';
$table = 'events';
$dimension_x = 50;
$dimension_y = 50;


// ------- proccess ------- //

//$query = "ALTER TABLE $table ADD thumb0 VARCHAR(100);";
//$result = mysql_query($query) or die(mysql_error());
$query = "SELECT * FROM $table;";
$result = mysql_query( $query ) or die(mysql_error());
while( $row = mysql_fetch_array( $result ) ) {
    $id = $row['id'];
    $uploaded_image = base64_decode( $row['image'] );
    $uploaded_image = imagecreatefromstring( $uploaded_image );
    $uploaded_x = imagesx($uploaded_image);
    $uploaded_y = imagesy($uploaded_image);
    do{
       $filename = random_32();
       $filename = $directory.$filename.'.jpg'; 
    } while( file_exists($filename) );
       $thumb = imagecreatetruecolor( $dimension_x , $dimension_y );
       imagecopyresampled( $thumb , $uploaded_image , 0 , 0 , 0 , 0 , $dimension_x , $dimension_y , $uploaded_x, $uploaded_y);
       imagedestroy( $uploaded_image ); // I also tried unset( $uploaded_image );
       imagejpeg( $thumb , $filename , 90);
       $query = "UPDATE $table SET image_xs = '$filename' WHERE id = $id LIMIT 1;";
       mysql_query($query) or die(mysql_error());
       echo "ran for one , ";
    }
echo "it all ran";

function random_32() { // this function generates a random filename
    $filename = rand( 100000000000000000 , 999999999999999999 );
    $filename = md5( $filename );
    return $filename;
    }

What I am getting is:

ran for one ,
Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 14032 bytes) in /home/leagu11/public_html/nightscene.gr/create_thumbs_people.php on line 21

Meaning my script runs for one image and dies before running for the next one.

I think I am doing something wrong with unsetting / destroying my data after each loop execution.

Any ideas?

Answer 1

You could ini_set the allowed memory size for the runtime of the current script using ini_set('memory_limit','128M'); But i have a feeling there might be something deeper hiding there.