首先来一段简单的php上传图片生成缩略图的详细代码,分享给大家供大家参考,具体内容如下
<?php function createThumbnail($imageDirectory, $imageName, $thumbDirectory, $thumbWidth, $quality){ $details = getimagesize("$imageDirectory/$imageName") or die('Please only upload images.'); $type = preg_replace('@^.+(?<=/)(.+)$@', '$1', $details['mime']); eval('$srcImg = imagecreatefrom'.$type.'("$imageDirectory/$imageName");'); $thumbHeight = $details[1] * ($thumbWidth / $details[0]); $thumbImg = imagecreatetruecolor($thumbWidth, $thumbHeight); imagecopyresampled($thumbImg, $srcImg, 0, 0, 0, 0, $thumbWidth, $thumbHeight, $details[0], $details[1]); eval('image'.$type.'($thumbImg, "$thumbDirectory/$imageName"'. (($type=='jpeg')?', $quality':'').');'); imagedestroy($srcImg); imagedestroy($thumbImg); } foreach ($_FILES["pictures"]["error"] as $key => $error) { if ($error == UPLOAD_ERR_OK) { $tmp_name = $_FILES["pictures"]["tmp_name"][$key]; $name = $_FILES["pictures"]["name"][$key]; move_uploaded_file($tmp_name, "data/$name"); createThumbnail("/location/of/main/image", $name, "/location/to/store/thumb", 120, 80); //120 = thumb width :: 80 = thumb quality (1-100) } } ?>
接下来再为大家推荐一个实例php使用GD库上传图片以及创建缩略图,直接看代码:
GD库是PHP进行图象操作一个很强大的库。
先在php.ini里增加一行引用:extension=php_gd2.dll
重启apache,做一个测试页var_dump(gd_info());输出数据表明GD库引用成功。
图片上传页面 upload.html
<html> <head> <meta http-equiv='Content-Type' c />"; } ?>
希望对大家学习php程序设计有所帮助,谢谢大家的支持。
以上就介绍了php上传图片生成缩略图(GD库),包括了方面的内容,希望对PHP教程有兴趣的朋友有所帮助。