PHP支持多種格式圖片上傳(支持jpg、png、gif)
更新時間：2011年11月03日 19:10:43 作者：
簡單地寫了一個PHP的圖片上傳，可以支持jpg、png、gif等格式的圖片，如果你想支持更多的格式，比如bmp，可以自己擴充。不是面向?qū)ο蟮?，在這里簡單記錄下，以便以后取用
此處一次支持上傳2個圖片，上傳后生成原圖和質(zhì)量較差的圖，原圖用于保存質(zhì)量高的圖片，質(zhì)量差的圖用于網(wǎng)頁顯示。
PHP Code
<?php
include_once("db.php");
include_once("dbinfo.php");
$connector = new nmdb($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("Y-m-d H:i:s");
$quality = 100;
$quality2 = 70;
$quality_png = 9;
$quality2_png = 7;
if(isset($_FILES['work1']) && $_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 "image/jpeg":
$resultImage = imagecreatefromjpeg($original);
imagejpeg($resultImage, $target, $quality);
break;
case "image/png":
$resultImage = imagecreatefrompng($original);
imagepng($resultImage, $target, $quality_png);
break;
case "image/gif":
$resultImage = imagecreatefromgif($original);
imagegif($resultImage, $target, $quality);
break;
default :
die("不支持此文件類型");
exit;
}
$work1_small = $target_name;
$target = dirname(__FILE__).'/uploads/small/'.$target_name;
switch($type)
{
case "image/jpeg":
$resultImage = imagecreatefromjpeg($original);
imagejpeg($resultImage, $target, $quality2);
break;
case "image/png":
$resultImage = imagecreatefrompng($original);
imagepng($resultImage, $target, $quality2_png);
break;
case "image/gif":
$resultImage = imagecreatefromgif($original);
imagegif($resultImage, $target, $quality2);
break;
default :
die("不支持此文件類型");
exit;
}
}
if(isset($_FILES['work2']) && $_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 "image/jpeg":
$resultImage = imagecreatefromjpeg($original);
imagejpeg($resultImage, $target, $quality);
break;
case "image/png":
$resultImage = imagecreatefrompng($original);
imagepng($resultImage, $target, $quality_png);
break;
case "image/gif":
$resultImage = imagecreatefromgif($original);
imagegif($resultImage, $target, $quality);
break;
default :
die("不支持此文件類型");
exit;
}
$work2_small = $target_name;
$target = dirname(__FILE__).'/uploads/small/'.$target_name;
switch($type)
{
case "image/jpeg":
$resultImage = imagecreatefromjpeg($original);
imagejpeg($resultImage, $target, $quality2);
break;
case "image/png":
$resultImage = imagecreatefrompng($original);
imagepng($resultImage, $target, $quality2_png);
break;
case "image/gif":
$resultImage = imagecreatefromgif($original);
imagegif($resultImage, $target, $quality2);
break;
default :
die("不支持此文件類型");
exit;
}
}
$sql="insert into photo(work_group,name,tel,id_card,work_name,place,work,work_small,date) values('$work_group','$name','$tel','$id_card','$work_name','$place','$work1','$work1_small','$date')";
//echo $sql;
$result = $connector -> query($sql) or die(mysql_error());
if($work2 != "" && $work2_small != null)
{
$sql2="insert into photo(work_group,name,tel,id_card,work_name,place,work,work_small,date) values('$work_group','$name','$tel','$id_card','$work_name','$place','$work2','$work2_small','$date')";
$result2 = $connector -> query($sql2) or die(mysql_error());
}
$connector -> close($connector);
$page="../upload.php";
echo "<script>alert('上傳成功！'); window.location = \"".$page."\";</script>";
?>
有些問題需要說明下：
JPEG圖像生成的圖像的質(zhì)量的是一個范圍從0（最低質(zhì)量，最小的文件大小）到100（最高質(zhì)量，最大文件大?。?。而ImagePNG生成圖像的質(zhì)量范圍從0到9的，傳入的這個范圍以外的參數(shù)則該函數(shù)不會工作。
判斷上傳文件的類型，$type = $_FILES['work1']['type'];。
創(chuàng)建各種格式的圖片可以使用這些函數(shù)：imagecreatefromjpeg()、imagecreatefrompng()、imagecreatefromgif()。
PHP Code
復(fù)制代碼 代碼如下:
<?php
include_once("db.php");
include_once("dbinfo.php");
$connector = new nmdb($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("Y-m-d H:i:s");
$quality = 100;
$quality2 = 70;
$quality_png = 9;
$quality2_png = 7;
if(isset($_FILES['work1']) && $_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 "image/jpeg":
$resultImage = imagecreatefromjpeg($original);
imagejpeg($resultImage, $target, $quality);
break;
case "image/png":
$resultImage = imagecreatefrompng($original);
imagepng($resultImage, $target, $quality_png);
break;
case "image/gif":
$resultImage = imagecreatefromgif($original);
imagegif($resultImage, $target, $quality);
break;
default :
die("不支持此文件類型");
exit;
}
$work1_small = $target_name;
$target = dirname(__FILE__).'/uploads/small/'.$target_name;
switch($type)
{
case "image/jpeg":
$resultImage = imagecreatefromjpeg($original);
imagejpeg($resultImage, $target, $quality2);
break;
case "image/png":
$resultImage = imagecreatefrompng($original);
imagepng($resultImage, $target, $quality2_png);
break;
case "image/gif":
$resultImage = imagecreatefromgif($original);
imagegif($resultImage, $target, $quality2);
break;
default :
die("不支持此文件類型");
exit;
}
}
if(isset($_FILES['work2']) && $_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 "image/jpeg":
$resultImage = imagecreatefromjpeg($original);
imagejpeg($resultImage, $target, $quality);
break;
case "image/png":
$resultImage = imagecreatefrompng($original);
imagepng($resultImage, $target, $quality_png);
break;
case "image/gif":
$resultImage = imagecreatefromgif($original);
imagegif($resultImage, $target, $quality);
break;
default :
die("不支持此文件類型");
exit;
}
$work2_small = $target_name;
$target = dirname(__FILE__).'/uploads/small/'.$target_name;
switch($type)
{
case "image/jpeg":
$resultImage = imagecreatefromjpeg($original);
imagejpeg($resultImage, $target, $quality2);
break;
case "image/png":
$resultImage = imagecreatefrompng($original);
imagepng($resultImage, $target, $quality2_png);
break;
case "image/gif":
$resultImage = imagecreatefromgif($original);
imagegif($resultImage, $target, $quality2);
break;
default :
die("不支持此文件類型");
exit;
}
}
$sql="insert into photo(work_group,name,tel,id_card,work_name,place,work,work_small,date) values('$work_group','$name','$tel','$id_card','$work_name','$place','$work1','$work1_small','$date')";
//echo $sql;
$result = $connector -> query($sql) or die(mysql_error());
if($work2 != "" && $work2_small != null)
{
$sql2="insert into photo(work_group,name,tel,id_card,work_name,place,work,work_small,date) values('$work_group','$name','$tel','$id_card','$work_name','$place','$work2','$work2_small','$date')";
$result2 = $connector -> query($sql2) or die(mysql_error());
}
$connector -> close($connector);
$page="../upload.php";
echo "<script>alert('上傳成功！'); window.location = \"".$page."\";</script>";
?>
有些問題需要說明下：
JPEG圖像生成的圖像的質(zhì)量的是一個范圍從0（最低質(zhì)量，最小的文件大小）到100（最高質(zhì)量，最大文件大?。?。而ImagePNG生成圖像的質(zhì)量范圍從0到9的，傳入的這個范圍以外的參數(shù)則該函數(shù)不會工作。
判斷上傳文件的類型，$type = $_FILES['work1']['type'];。
創(chuàng)建各種格式的圖片可以使用這些函數(shù)：imagecreatefromjpeg()、imagecreatefrompng()、imagecreatefromgif()。
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