我这里只考虑jpg,gif,png格式.
<?php
/**
* @author iwind iwind@wangyou.com.cn
*/
class Image
{
var $ext;
var $i_ext;
var $width;
var $height;
var $create_func;
var $out_func;
function image_load($files)
{
$file = (is_array($files))?$files[0]:$files;
$info = getimagesize($file);
switch ($info[2])
{
case "1":
$this->ext = "gif";
$this->i_ext = "gif";
break;
case "2":
$this->ext = "jpg";
$this->i_ext = "jpeg";
break;
case "3":
$this->ext = "png";
$this->i_ext = "png";
break;
default:
$this->ext = "jpg";
$this->i_ext = "jpeg";
}
$this->create_func = "imagecreatefrom" . $this->i_ext;
$this->out_func = "image" . $this->i_ext;
$this->width = $info[0];
$this->height = $info[1];
}
function image_split($photo, $x_num=1, $y_num=1)
{
$this->image_load($photo);
eval("\$im=" . $this->create_func . "(\$photo);");
$x_width = $this->width/$x_num;
$y_height = $this->height/$y_num;
$im1 = imagecreate($x_width, $y_height);
$files = array();
for ($i=0; $i<$x_num; $i++)
{
for ($j=0; $j<$y_num; $j++)
{
$x = $i * $x_width;
$y = $j * $y_height;
imagecopyresampled($im1, $im, 0, 0, $x, $y, $x_width, $y_height, $x_width, $y_height);
$new_file = "{$i}_{$j}.{$this->ext}";
$files[] = $new_file;
eval("{$this->out_func}(\$im1, \$new_file);");
}
}
imagedestroy($im1);
return $files;
}
function image_join($files, $new_file)
{
if (!empty($files))
{
$this->image_load($files);
$i_arr = array();
$j_arr = array();
foreach ($files as $v)
{
list($v1) = explode(".", $v);
list($i_arr[], $j_arr[]) = explode("_", $v1);
}
$i_arr = array_unique($i_arr);
$j_arr = array_unique($j_arr);
$x_num = count($i_arr);
$y_num = count($j_arr);
$im1 = imagecreate($x_num * $this->width, $y_num * $this->height);
foreach ($i_arr as $i)
{
foreach ($j_arr as $j)
{
$x = $i * $this->width;
$y = $j * $this->height;
eval("\$im = {$this->create_func}(" . "\"{$i}_{$j}.{$this->ext}\");");
imagecopyresampled($im1, $im, $x, $y, 0, 0, $this->width, $this->height, $this->width, $this->height);
}
}
eval("{$this->out_func}(\$im1, \$new_file);");
}
}
}
//创建一个实例
$img = new image();
//将 20041099024319.jpg 分成 2 * 3部分，即宽两部分，高三部分
//$files 是文件名数组
$files = $img->image_split("20041099024319.jpg", 2 , 3);
//将分成的小图重新组起来，名称为 new.jpg
$img->image_join($files, "new.jpg");
//
echo "success......";
?>
