Generate image with text issue - centering text

[matthewod]

I am working on setting up an on the fly business card generator and I am having some issues!  

 

For some reason I cannot center my text.  Here is my code:

 

 

$image_width = 600;

$x_name = (($image_width - strlen($name))/2);

$x_address = (($image_width - (strlen($address_line)))/2);

$x_contact = (($image_width - strlen($contact_line))/2);


imagettftext($jpg_image, 20, 0, 300, 220, $black, $font_path, $name);

imagettftext($jpg_image, 16, 0, $x_address, 300, $white, $font_path, $address_line);

imagettftext($jpg_image, 16, 0, $x_contact, 325, $white, $font_path, $contact_line);


imagejpeg($jpg_image);

 

 

Where X is the left margin.  All my variables are working fine.  But this what I am getting:

http://www.fgbmfamerica.org/business-card-preview.php?first_name=First&last_name=Last&address=Address&city=Anywhere&state=TN&postal=55555&phone=555-555-3340&email=mdell@anydomain.org

 

I am not sure what I am doing wrong but any help would be appreciated!  

 

Thank you!

 

[matthewod]

One more issue I am having with this project is my font is not setting to my $font_path.  Maybe I'll double check my path to my font but any addition info would be helpful!

 

Thanks

[Ch0cu3r]

Are you using this to center the text?

 

 

$x_name = (($image_width - strlen($name))/2);
$x_address = (($image_width - (strlen($address_line)))/2);
$x_contact = (($image_width - strlen($contact_line))/2);

You cannot minus the character length of your string from the total width of your image.

 

Instead you need to use imagettfbbox. This will return the x and y boundaries of your text in pixels. You would take away the 'lower right corner, X position' of your text from the total width of your image and then divide what is left by 2 to calculate the correct x position of your text so it is centered within your image.

 

Example code

// The text to draw
$text = 'Hello World';

// get the bounding box of our text
$bbox = imagettfbbox(20, 0, $font, $text);

// calculate the center X position of our text
    // 1. get the image width
    // 2. minus the texts lower right corner, X position
    // 3. divided whats is left by 2
$x = (imagesx($im) - $bbox[2]) / 2;
// Y position of our text
$y = 50;

// Add the text
imagettftext($im, 20, 0, $x, $y, $black, $font, $text);