Re: Configuring PHP with GD and JPEG support

Hey Mike, A google search for "PHP is unable to call the GD function" reveiled some interesting results. Have a look see. Best, Karl Sent from my iPhone On Jan 16, 2011, at 1:35 AM, mike dorian <united.eagle@hotmail.com> wrote:

Just tried it with the following but still fails. All I'm getting is a blank page. <php? function create_image() {

    //Let's generate a totally random string using md5
    $md5_hash = md5(rand(0,999));
    //We don't need a 32 character long string so we trim it down to 5
    $security_code = substr($md5_hash, 15, 5);

    //Set the session to store the security code
    $_SESSION["security_code"] = $security_code;

    //Set the image width and height
    $width = 100;
    $height = 20;

    //Create the image resource
    $image = ImageCreate($width, $height);

    //We are making three colors, white, black and gray
    $white = ImageColorAllocate($image, 255, 255, 255);
    $black = ImageColorAllocate($image, 0, 0, 0);
    $grey = ImageColorAllocate($image, 204, 204, 204);

    //Make the background black
    ImageFill($image, 0, 0, $black);

    //Add randomly generated string in white to the image
    ImageString($image, 3, 30, 3, $security_code, $white);

    //Throw in some lines to make it a little bit harder for any bots to break
    ImageRectangle($image,0,0,$width-1,$height-1,$grey);
    imageline($image, 0, $height/2, $width, $height/2, $grey);
    imageline($image, $width/2, 0, $width/2, $height, $grey);

    //Tell the browser what kind of file is come in
    header("Content-Type: image/jpeg");

    //Output the newly created image in jpeg format
    ImageJpeg($image);

    //Free up resources
    ImageDestroy($image);

} create_image(); ?>

From: karl@designdrumm.com Date: Mon, 10 Jan 2011 17:10:35 -0600 To: php-db@lists.php.net Subject: Re: [PHP-DB] Configuring PHP with GD and JPEG support On Jan 10, 2011, at 9:35 AM, mike dorian wrote:

Hello, Questions with regards to compiling PHP to support GD with JPEG on 64-bit CentOS 5.5. 1) Specifying folder for jpeg library When I execute the following command, am I saying the full path to libdir is at /usr/source/lib64? ./configure --with-apxs2=/usr/local/apache2/bin/apxs --with-gd -- with-jpeg-dir=/usr/source --with-libdir=lib64 Should I have done the following instead? ./configure --with-apxs2=/usr/local/apache2/bin/apxs --with-gd -- with-jpeg-dir=/usr/source/lib64 2) After copying the compiled JPEG libraries to the the lib64 directory, PHP is still unable to call the GD functions (ie ImageCreateFromJpeg) properly. Once I've done the following. ./configure --enable-shared make make install I have the following files installed. Meanwhile the /usr/local/ lib64 directory doesn't have these files. Despite copying the whole set to /usr/local/lib64, the above configure command still doesn't work. /usr/local/lib/libjpeg.a /usr/local/lib/libjpeg.la /usr/local/lib/libjpeg.so -> libjpeg.so.8.0.2 /usr/local/lib/libjpeg.so.8 -> libjpeg.so.8.0.2 /usr/local/lib/libjpeg.so.8.0.2 The following displays a blank page on my Firefox. <?php header('Content-Type: image/jpeg'); $image_file_path = '/usr/local/apache2/htdocs/image.jpg'; $image_file_path"; $im = @ImageCreateFromJpeg($image_file_path)"; echo "$im"; imagejpeg($im); echo "End: imagedestroy($im)"; ?>

Hi Mike, Dont know about your server config, but maybe try using this create image script and see. function create_image() {

    //Let's generate a totally random string using md5
    $md5_hash = md5(rand(0,999));
    //We don't need a 32 character long string so we trim it down to 5
    $security_code = substr($md5_hash, 15, 5);

    //Set the session to store the security code
    $_SESSION["security_code"] = $security_code;

    //Set the image width and height
    $width = 100;
    $height = 20;

    //Create the image resource
    $image = ImageCreate($width, $height);

    //We are making three colors, white, black and gray
    $white = ImageColorAllocate($image, 255, 255, 255);
    $black = ImageColorAllocate($image, 0, 0, 0);
    $grey = ImageColorAllocate($image, 204, 204, 204);

    //Make the background black
    ImageFill($image, 0, 0, $black);

    //Add randomly generated string in white to the image
    ImageString($image, 3, 30, 3, $security_code, $white);

    //Throw in some lines to make it a little bit harder for any

bots to break

    ImageRectangle($image,0,0,$width-1,$height-1,$grey);
    imageline($image, 0, $height/2, $width, $height/2, $grey);
    imageline($image, $width/2, 0, $width/2, $height, $grey);

    //Tell the browser what kind of file is come in
    header("Content-Type: image/jpeg");

    //Output the newly created image in jpeg format
    ImageJpeg($image);

    //Free up resources
    ImageDestroy($image);

} Was taken from the WebCheatSheet.com - Create CAPTCHA Protection. Namely to see how they are using the ImageJpeg, not the whole code. But, at least you will have a code you know produces an image if anything and you can shorten the things on the list to check. ;) HTH, Karl DeSaulniers Design Drumm http://designdrumm.com --PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php