PHP基础

<?php 

function cimgstr($imgname,$word,$fontsize){
	list($width,$height,$imgType) = getimagesize($imgname);
	$types = array('1' => 'gif', '2' => 'jpeg', '3' => 'png' );
	$createImg = 'imagecreatefrom'.$types[$imgType];
	$img = $createImg($imgname);

	$red = imagecolorallocate($img, 255,0,0);
	$x = ($width - imagefontwidth($fontsize)*strlen($word))/2;
	$y = ($height - imagefontheight($fontsize))/2;
	imagestring($img, $fontsize, $x, $y, $word, $red);

	$save = 'image'.$types[$imgType];

	$save($img, 'new_' . $imgname);

	imagedestroy($img);
}

cimgstr('logo.gif','qdgithub.com',5);
cimgstr('logo.png','qdgithub.com',5);
cimgstr('me.jpg','qdgithub.com',5);

 ?>