Creating a thumbnail from an uploaded image using php
<?php
function resize_crop_image($max_width, $max_height, $source_file, $dst_dir, $quality = 80){
$imgsize = getimagesize($source_file);
$width = $imgsize[0];
$height = $imgsize[1];
$mime = $imgsize['mime'];
switch($mime){
case 'image/gif':
$image_create = "imagecreatefromgif";
$image = "imagegif";
break;
case 'image/png':
$image_create = "imagecreatefrompng";
$image = "imagepng";
$quality = 100;
break;
case 'image/jpeg':
$image_create = "imagecreatefromjpeg";
$image = "imagejpeg";
$quality = 100;
break;
default:
return false;
break;
}
$dst_img = imagecreatetruecolor($max_width, $max_height);
$src_img = $image_create($source_file);
$width_new = $height * $max_width / $max_height;
$height_new = $width * $max_height / $max_width;
//if the new width is greater than the actual width of the image, then the height is too large and the rest cut off, or vice versa
if($width_new > $width){
//cut point by height
$h_point = (($height - $height_new) / 2);
//copy image
// imagecopyresampled($dst_img, $src_img, 0, 0, 0, $h_point, $max_width, $max_height, $width, $height_new);
}else{
//cut point by width
$w_point = (($width - $width_new) / 2);
// imagecopyresampled($dst_img, $src_img, 0, 0, $w_point, 0, $max_width, $max_height, $width_new, $height);
}
imagecopyresampled($dst_img, $src_img, 0, 0, 0, 0, $max_width, $max_height, $width, $height);
$image($dst_img, $dst_dir);
if($dst_img)imagedestroy($dst_img);
if($src_img)imagedestroy($src_img);
$imagedata =ob_end_clean();
return $dst_dir;
}
$img = $_FILES['file']['tmp_name'];
$file_name = "aaa/"."thumb_".$_FILES['file']['name'];
resize_crop_image(250, 250,$img, $file_name);
?>
<form method="post" enctype="multipart/form-data">
<input type="file" name="file">
<input type="submit" name="save" value="save"/>
</form>
function resize_crop_image($max_width, $max_height, $source_file, $dst_dir, $quality = 80){
$imgsize = getimagesize($source_file);
$width = $imgsize[0];
$height = $imgsize[1];
$mime = $imgsize['mime'];
switch($mime){
case 'image/gif':
$image_create = "imagecreatefromgif";
$image = "imagegif";
break;
case 'image/png':
$image_create = "imagecreatefrompng";
$image = "imagepng";
$quality = 100;
break;
case 'image/jpeg':
$image_create = "imagecreatefromjpeg";
$image = "imagejpeg";
$quality = 100;
break;
default:
return false;
break;
}
$dst_img = imagecreatetruecolor($max_width, $max_height);
$src_img = $image_create($source_file);
$width_new = $height * $max_width / $max_height;
$height_new = $width * $max_height / $max_width;
//if the new width is greater than the actual width of the image, then the height is too large and the rest cut off, or vice versa
if($width_new > $width){
//cut point by height
$h_point = (($height - $height_new) / 2);
//copy image
// imagecopyresampled($dst_img, $src_img, 0, 0, 0, $h_point, $max_width, $max_height, $width, $height_new);
}else{
//cut point by width
$w_point = (($width - $width_new) / 2);
// imagecopyresampled($dst_img, $src_img, 0, 0, $w_point, 0, $max_width, $max_height, $width_new, $height);
}
imagecopyresampled($dst_img, $src_img, 0, 0, 0, 0, $max_width, $max_height, $width, $height);
$image($dst_img, $dst_dir);
if($dst_img)imagedestroy($dst_img);
if($src_img)imagedestroy($src_img);
$imagedata =ob_end_clean();
return $dst_dir;
}
$img = $_FILES['file']['tmp_name'];
$file_name = "aaa/"."thumb_".$_FILES['file']['name'];
resize_crop_image(250, 250,$img, $file_name);
?>
<form method="post" enctype="multipart/form-data">
<input type="file" name="file">
<input type="submit" name="save" value="save"/>
</form>
