可定制的PHP缩略图生成程式(需要GD库支持)_php实例

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Release: 2016-06-07 17:26:55
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经典的PHP缩略图生成程式,基于GD库,可指定生成路径及生成目标的宽高细节 使用方法: 在支持GD库的PHP环境中,将以下代码另存为resize.php测试 


经典的PHP缩略图生成程式,基于GD库,可指定生成路径及生成目标的宽高细节 

使用方法: 在支持GD库的PHP环境中,将以下代码另存为resize.php测试  


复制代码 代码如下:

 

$FILENAME="image_name"; 

// 生成图片的宽度 
$RESIZEWIDTH=400; 

// 生成图片的高度 
$RESIZEHEIGHT=400; 

//生成图片的路径 
$uploaddir="c:/winnt/temp"; 

function ResizeImage($im,$maxwidth,$maxheight,$name){ 
global $uploaddir; 
$width = imagesx($im); 
$height = imagesy($im); 
if(($maxwidth && $width > $maxwidth) || ($maxheight && $height > $maxheight)){ 
if($maxwidth && $width > $maxwidth){ 
$widthratio = $maxwidth/$width; 
$RESIZEWIDTH=true; 

if($maxheight && $height > $maxheight){ 
$heightratio = $maxheight/$height; 
$RESIZEHEIGHT=true; 

if($RESIZEWIDTH && $RESIZEHEIGHT){ 
if($widthratio $ratio = $widthratio; 
}else{ 
$ratio = $heightratio; 

}elseif($RESIZEWIDTH){ 
$ratio = $widthratio; 
}elseif($RESIZEHEIGHT){ 
$ratio = $heightratio; 

$newwidth = $width * $ratio; 
$newheight = $height * $ratio; 
if(function_exists("imagecopyresampled")){ 
$newim = imagecreatetruecolor($newwidth, $newheight); 
imagecopyresampled($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); 
}else{ 
$newim = imagecreate($newwidth, $newheight); 
imagecopyresized($newim, $im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height); 

ImageJpeg ($newim,$uploaddir.$name . ".jpg"); 
ImageDestroy ($newim); 
}else{ 
ImageJpeg ($im,$uploaddir.$name . ".jpg"); 





if($_FILES['image']['size']){ 
if($_FILES['image']['type'] == "image/pjpeg"){ 
$im = imagecreatefromjpeg($_FILES['image']['tmp_name']); 
}elseif($_FILES['image']['type'] == "image/x-png"){ 
$im = imagecreatefrompng($_FILES['image']['tmp_name']); 
}elseif($_FILES['image']['type'] == "image/gif"){ 
$im = imagecreatefromgif($_FILES['image']['tmp_name']); 

if($im){ 
if(file_exists("$FILENAME.jpg")){ 
unlink("$FILENAME.jpg"); 

ResizeImage($im,$RESIZEWIDTH,$RESIZEHEIGHT,$FILENAME); 
ImageDestroy ($im); 


?> 

可定制的PHP缩略图生成程式(需要GD库支持)_php实例">

 

 

 

 
 

  

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