How can text alignment be achieved in PHP when overlaying text on an image, and what are the best practices for centering text?

To achieve text alignment in PHP when overlaying text on an image, you can use the `imagettftext()` function along with the `imagettfbbox()` function to calculate the text width and height, and then adjust the starting position based on the desired alignment (e.g., centering the text). One way to center text is to calculate the center position based on the image dimensions and the text dimensions. 

// Load the image
$image = imagecreatefromjpeg('image.jpg');

// Set the text properties
$text = "Sample Text";
$font = 'arial.ttf';
$size = 24;
$angle = 0;
$color = imagecolorallocate($image, 255, 255, 255);

// Get the text dimensions
$text_box = imagettfbbox($size, $angle, $font, $text);
$text_width = $text_box[2] - $text_box[0];
$text_height = $text_box[1] - $text_box[7];

// Calculate the center position
$image_width = imagesx($image);
$image_height = imagesy($image);
$x = ($image_width - $text_width) / 2;
$y = ($image_height + $text_height) / 2;

// Add the text to the image
imagettftext($image, $size, $angle, $x, $y, $color, $font, $text);

// Output the image
header('Content-Type: image/jpeg');
imagejpeg($image);

// Free up memory
imagedestroy($image);

Keywords

PHP text alignment image overlay centering text GD library

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