PHP支持多种格式图片上传(支持jpg、png、gif)

Anne ·
更新时间:2024-11-10
· 672 次阅读

此处一次支持上传2个图片,上传后生成原图和质量较差的图,原图用于保存质量高的图片,质量差的图用于网页显示。
PHP Code
代码如下:
<?php
include_once(&quot;db.php&quot;);
include_once(&quot;dbinfo.php&quot;);
$connector = new nmdb($host, $username, $password);
$connector -> select_db($database);
$work_group = check_input($_POST['work_group']);
$name = check_input($_POST['name']);
$tel = check_input($_POST['tel']);
$id_card = check_input($_POST['id_card']);
$work_name = check_input($_POST['work_name']);
$place = check_input($_POST['place']);
$work1 = check_input($_POST['work1']);
date_default_timezone_set('PRC');
$date = date(&quot;Y-m-d H:i:s&quot;);
$quality = 100;
$quality2 = 70;
$quality_png = 9;
$quality2_png = 7;
if(isset($_FILES['work1']) &amp;&amp; $_FILES['work1']['error']==0)
{
$size = getimagesize($_FILES['work1']['tmp_name']);
$original = $_FILES['work1']['tmp_name'];
$type = $_FILES['work1']['type'];
//echo $type;
$target_name = date('YmdHis').'_'.preg_replace('`[^a-z0-9-_.]`i','',$_FILES['work1']['name']);
$work1 = $target_name;
$target = dirname(__FILE__).'/uploads/'.$target_name;
switch($type)
{
case &quot;image/jpeg&quot;:
$resultImage = imagecreatefromjpeg($original);
imagejpeg($resultImage, $target, $quality);
break;
case &quot;image/png&quot;:
$resultImage = imagecreatefrompng($original);
imagepng($resultImage, $target, $quality_png);
break;
case &quot;image/gif&quot;:
$resultImage = imagecreatefromgif($original);
imagegif($resultImage, $target, $quality);
break;
default :
die(&quot;不支持此文件类型&quot;);
exit;
}
$work1_small = $target_name;
$target = dirname(__FILE__).'/uploads/small/'.$target_name;
switch($type)
{
case &quot;image/jpeg&quot;:
$resultImage = imagecreatefromjpeg($original);
imagejpeg($resultImage, $target, $quality2);
break;
case &quot;image/png&quot;:
$resultImage = imagecreatefrompng($original);
imagepng($resultImage, $target, $quality2_png);
break;
case &quot;image/gif&quot;:
$resultImage = imagecreatefromgif($original);
imagegif($resultImage, $target, $quality2);
break;
default :
die(&quot;不支持此文件类型&quot;);
exit;
}
}
if(isset($_FILES['work2']) &amp;&amp; $_FILES['work2']['error']==0)
{
$size = getimagesize($_FILES['work2']['tmp_name']);
$original = $_FILES['work2']['tmp_name'];
$type = $_FILES['work2']['type'];
$target_name = date('YmdHis').'_'.preg_replace('`[^a-z0-9-_.]`i','',$_FILES['work2']['name']);
$work2 = $target_name;
$target = dirname(__FILE__).'/uploads/'.$target_name;
switch($type)
{
case &quot;image/jpeg&quot;:
$resultImage = imagecreatefromjpeg($original);
imagejpeg($resultImage, $target, $quality);
break;
case &quot;image/png&quot;:
$resultImage = imagecreatefrompng($original);
imagepng($resultImage, $target, $quality_png);
break;
case &quot;image/gif&quot;:
$resultImage = im agecreatefromgif($original);
imagegif($resultImage, $target, $quality);
break;
default :
die(&quot;不支持此文件类型&quot;);
exit;
}
$work2_small = $target_name;
$target = dirname(__FILE__).'/uploads/small/'.$target_name;
switch($type)
{
case &quot;image/jpeg&quot;:
$resultImage = imagecreatefromjpeg($original);
imagejpeg($resultImage, $target, $quality2);
break;
case &quot;image/png&quot;:
$resultImage = imagecreatefrompng($original);
imagepng($resultImage, $target, $quality2_png);
break;
case &quot;image/gif&quot;:
$resultImage = imagecreatefromgif($original);
imagegif($resultImage, $target, $quality2);
break;
default :
die(&quot;不支持此文件类型&quot;);
exit;
}
}
$sql=&quot;insert into photo(work_group,name,tel,id_card,work_name,place,work,work_small,date) values('$work_group','$name','$tel','$id_card','$work_name','$place','$work1','$work1_small','$date')&quot;;
//echo $sql;
$result = $connector -> query($sql) or die(mysql_error());
if($work2 != &quot;&quot; &amp;&amp; $work2_small != null)
{
$sql2=&quot;insert into photo(work_group,name,tel,id_card,work_name,place,work,work_small,date) values('$work_group','$name','$tel','$id_card','$work_name','$place','$work2','$work2_small','$date')&quot;;
$result2 = $connector -> query($sql2) or die(mysql_error());
}
$connector -> close($connector);
$page=&quot;../upload.php&quot;;
echo &quot;<script>alert('上传成功!'); window.location = \&quot;&quot;.$page.&quot;\&quot;;</script>&quot;;
?>

有些问题需要说明下:
JPEG图像生成的图像的质量的是一个范围从0(最低质量,最小的文件大小)到100(最高质量,最大文件大小)。而ImagePNG生成图像的质量范围从0到9的,传入的这个范围以外的参数则该函数不会工作。
判断上传文件的类型,$type = $_FILES['work1']['type'];。
创建各种格式的图片可以使用这些函数:imagecreatefromjpeg()、imagecreatefrompng()、imagecreatefromgif()。 您可能感兴趣的文章:php多个文件及图片上传实例详解PHP+jQuery+Ajax实现多图片上传效果jquery+php+ajax显示上传进度的多图片上传并生成缩略图代码PHP实现多图片上传类实例PHP仿微信多图片预览上传实例代码Android OkHttp 结合php 多图片上传实例php实现多张图片上传加水印技巧PHP结合jquery ajax实现上传多张图片,并限制图片大小操作示例php+flash+jQuery多图片上传源码分享PHP实现一个按钮点击上传多个图片操作示例



图片上传 图片 jpg png PHP

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