create white image with php

问题

I trying create empty white image with php, this s my code

$bg = imagecreatetruecolor(120, 20);

imagejpeg($bg,"test/myimg.jpg",100);

but this created black image and I want create white, please tell how to set image for example white color?

回答1:

<?php
$img = imagecreatetruecolor(120, 20);
$bg = imagecolorallocate ( $img, 255, 255, 255 );
imagefilledrectangle($img,0,0,120,20,$bg);
imagejpeg($img,"myimg.jpg",100);
?>

来源：https://stackoverflow.com/questions/11914301/create-white-image-with-php