center text in image - php

Question

So I have an image, and I am writing text and a color box onto the image. It works but it's being added to the image in the top right corner, but I need it in the center of the image. I tried changing the x and y variables, but it only moves the text and not the white box.
Here is code
$image_filepath = './kenshin.jpg';
saveImageWithText("Welcome to Eureka!", $color, $image_filepath);
function saveImageWithText($text, $color, $source_file) {
$public_file_path = '.';
// Copy and resample the imag
list($width, $height) = getimagesize($source_file);
$image_p = imagecreatetruecolor($width, $height);
$image = imagecreatefromjpeg($source_file);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width, $height);
// Prepare font size and colors
$text_color = imagecolorallocate($image_p, 0, 0, 0);
$bg_color = imagecolorallocate($image_p, 255, 255, 255);
$font = $public_file_path . '/arial.ttf';
$font_size = 12;
// Set the offset x and y for the text position
$offset_x = 0;
$offset_y = 20;
// Get the size of the text area
$dims = imagettfbbox($font_size, 0, $font, $text);
$text_width = $dims[4] - $dims[6] + $offset_x;
$text_height = $dims[3] - $dims[5] + $offset_y;
// Add text background
imagefilledrectangle($image_p, 0, 0, $text_width, $text_height, $bg_color);
// Add text
imagettftext($image_p, $font_size, 0, $offset_x, $offset_y, $text_color, $font, $text);
// Save the picture
imagejpeg($image_p, $public_file_path . '/output.jpg', 100);
// Clear
imagedestroy($image);
imagedestroy($image_p);
};
Here is output

Answer 1

Try this. It will help you…
<?php
$img = imagecreatefromjpeg("girl-hugging-the-globe.jpg"); // image.jpg is the image on which we are going to write text ,you can replace this iamge name with your
if(!$img) die("Unabe to load image");
$red = imagecolorallocate($img, 255, 0, 0);
$green = imagecolorallocate($img, 0, 255, 0);
$width = 600;// it will store width of image
$height = 100; //it will store height of image
$fontsize = 6; // size of font
$text = "Block Prints Online"; // Define the text
$pos = ( $width - imagefontwidth($fontsize)*STRLEN($text) );// calculate the left position of the text:
imagestring($img, $fontsize, 200, 150, $text, $red);
header('Content-type: image/jpeg');
imagejpeg($img);//it will output a jpeg image
imagedestroy($img);//it will destroy $img*/
?>