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舊 2007-01-17, 06:35 PM   #1
Senior Member
 
註冊日期: 2005-05-29
住址: http://mamba.zapto.org/bbs/
文章: 119
預設 【分享】PHP中製作圖片縮圖
朋友昨天問我PHP中如何製作圖片的縮圖
Google一下(google在此處是動詞還是名詞？)中找了到了不少的資料
最後決定使用PHP官方站上的範例(webmaster at WWW.ELLESSEWEB.NET)
來進行修改保留約四十趴的原始程式碼
本方法只將圖片縮小後直接顯示於browser
並沒有將製作完的縮圖存檔
如需存檔的功能請自行修改程式碼

PHP 代碼:
function makeThumbnail($arg_strFileName, $arg_intThumbWd = 100) 
{
    $aryImageInfo        = getImageSize($arg_strFileName);     
    $objImageCreate        = null;    
    $aryExcuteFunction    = null;
    $strErrMsg        = '';
    $intThumbHt        = 0;
    $aryFunImageCreateFrom = array(
        'GIF'    => 'imageCreateFromGIF',
        'JPG'   => 'imageCreateFromJPEG',
        'PNG'   => 'imageCreateFromPNG',
        'WBMP'  => 'imageCreateFromWBMP'    
    );
    $aryFunImageOutput = array(
        'GIF'    => 'imagegif',
        'JPG'   => 'imagejpeg',
        'PNG'   => 'imagepng',
        'WBMP'  => 'imagewbmp'    
    );        
    switch ($aryImageInfo['mime']) 
    {
        case 'image/gif':
            if (imagetypes() & IMG_GIF)  
            { 
                $aryExcuteFunction['CreateFrom'] = $aryFunImageCreateFrom['GIF'];
                $aryExcuteFunction['OutPutFrom'] = $aryFunImageOutput['GIF'];
            } 
            else 
            {
                $strErrMsg = 'GIF images are not supported<br />';
            }
            break;
        case 'image/jpeg':
            if (imagetypes() & IMG_JPG) 
            {
                $aryExcuteFunction['CreateFrom'] = $aryFunImageCreateFrom['JPG'];
                $aryExcuteFunction['OutPutFrom'] = $aryFunImageOutput['JPG'];
            }
            else
            {
                $strErrMsg = 'JPEG images are not supported<br />';
            }
            break;
        case 'image/png':
            if (imagetypes() & IMG_PNG)
            {
                $aryExcuteFunction['CreateFrom'] = $aryFunImageCreateFrom['PNG'];
                $aryExcuteFunction['OutPutFrom'] = $aryFunImageOutput['PNG'];
            } 
            else
            {
                $strErrMsg = 'PNG images are not supported<br />';
            }
            break;
        case 'image/wbmp':
            if (imagetypes() & IMG_WBMP) 
            {
                $aryExcuteFunction['CreateFrom'] = $aryFunImageCreateFrom['WBMP'];
                $aryExcuteFunction['OutPutFrom'] = $aryFunImageOutput['WBMP'];
            } 
            else
            {
                $strErrMsg = 'WBMP images are not supported<br />';
            }
            break;
        default:
            $strErrMsg = $arg_strImageFormat.' images are not supported<br />';
            break;
    }
    if(empty($strErrMsg))
    {        
        $objImageCreate = $aryExcuteFunction['CreateFrom']($arg_strFileName);        
        $intThumbHt = round($aryImageInfo[1] * $arg_intThumbWd / $aryImageInfo[0]);
        $objTargetImageCreate = imageCreateTrueColor($arg_intThumbWd,$intThumbHt);       
        imageCopyResampled($objTargetImageCreate, $objImageCreate, 0, 0, 0, 0, $arg_intThumbWd, $intThumbHt, $aryImageInfo[0], $aryImageInfo[1]);      
        $aryExcuteFunction['OutPutFrom']($objTargetImageCreate);      
        imageDestroy($objImageCreate);
        imageDestroy($objTargetImageCreate);
    }
    else
    {
        echo $strErrMsg;
        exit;
    }
} 
這麼使用這個Function ？
makeThumbnail("含路徑的檔名",縮小的寬度);
例如
//firefox需要發送圖片標頭
header("Content-type: image/jpg");
makeThumbnail("pic/20070117-001.jpg",200);
__________________
有空來灌點水...
http://tw.myblog.yahoo.com/jw!v9EKjxOXCkSQzfYe5uE-/
陳醉欣 目前離線   回覆時引用此篇文章
舊 2007-01-17, 07:34 PM   #2
論壇站長
 
註冊日期: 2004-10-06
住址: http://www.twvbb.com
文章: 1,574
預設
大作不斷湧現(茶)，話說我也有一個文字->圖片的函數，等等來整理分享一下

這裡的 Google 是動詞 轉移到精華區
__________________
vBulletin 問題請在論壇討論，請勿私下詢問我，以利後人參考
ckmarkhsu 目前離線   回覆時引用此篇文章
舊 2007-01-17, 09:54 PM   #3
Senior Member
 
註冊日期: 2005-05-29
住址: http://mamba.zapto.org/bbs/
文章: 119
預設
第二版
減少不必要的程式碼.

PHP 代碼:
function makeThumbnail($arg_strFileName, $arg_intThumbWd = 100)
{
    $aryImageInfo        = getImageSize($arg_strFileName);     
    $objImageCreate        = null;    
    $aryExcuteFunction    = null;
    $strErrMsg        = '';
    $intThumbHt        = 0;
    $aryFunImageCreateFrom = array(
        'image/gif'    => 'imageCreateFromGIF',
        'image/jpeg'   => 'imageCreateFromJPEG',
        'image/png'   => 'imageCreateFromPNG',
        'image/wbmp'  => 'imageCreateFromWBMP'    
    );
    $aryFunImageOutput = array(
        'image/gif'    => 'imagegif',
        'image/jpeg'   => 'imagejpeg',
        'image/png'   => 'imagepng',
        'image/wbmp'  => 'imagewbmp'    
    );     
    if(array_key_exists($aryImageInfo['mime'],$aryFunImageCreateFrom))
    {       
        $aryExcuteFunction['CreateFrom'] = $aryFunImageCreateFrom[$aryImageInfo['mime']];
        $aryExcuteFunction['OutPutFrom'] = $aryFunImageOutput[$aryImageInfo['mime']];
    }
    else
    {
        $strErrMsg = $arg_strImageFormat.' images are not supported<br />';
    }    
    if(empty($strErrMsg))
    {  
        $objImageCreate = $aryExcuteFunction['CreateFrom']($arg_strFileName);        
        $intThumbHt = round($aryImageInfo[1] * $arg_intThumbWd / $aryImageInfo[0]);
        $objTargetImageCreate = imageCreateTrueColor($arg_intThumbWd,$intThumbHt);       
        imageCopyResampled($objTargetImageCreate, $objImageCreate, 0, 0, 0, 0, $arg_intThumbWd, $intThumbHt, $aryImageInfo[0], $aryImageInfo[1]);      
        $aryExcuteFunction['OutPutFrom']($objTargetImageCreate);      
        imageDestroy($objImageCreate);
        imageDestroy($objTargetImageCreate);
    }
    else
    {
        echo $strErrMsg;       
        exit;
    }
} 
__________________
有空來灌點水...
http://tw.myblog.yahoo.com/jw!v9EKjxOXCkSQzfYe5uE-/
此篇文章於 2007-01-17 09:57 PM 被 陳醉欣 編輯.
陳醉欣 目前離線   回覆時引用此篇文章
舊 2007-01-17, 10:21 PM   #4
Senior Member
 
註冊日期: 2005-05-29
住址: http://mamba.zapto.org/bbs/
文章: 119
預設
第三版.......

PHP 代碼:
function makeThumbnail($arg_strFileName, $arg_intThumbWd = 100)
{
    $aryImageInfo       = getImageSize($arg_strFileName);  
    $intThumbHt            = 0;    
    $aryImageFunction = array(
        'image/gif' => 
            array(
                'CreateFrom'=>'imageCreateFromGIF',
                'OutPutFrom'=>'imagegif'                            
            ),
        'image/jpeg' => 
            array(
                'CreateFrom'=>'imageCreateFromJPEG',
                'OutPutFrom'=>'imagejpeg'    
            ),
        'image/png' => 
            array(
                'CreateFrom'=>'imageCreateFromPNG',
                'OutPutFrom'=>'imagepng'    
            ),
        'image/wbmp' => 
            array(
                'CreateFrom'=>'imageCreateFromWBMP',
                'OutPutFrom'=>'imagewbmp'    
            )    
    );    
    if(array_key_exists($aryImageInfo['mime'],$aryImageFunction))
    {
        $aryExcuteFunction        = $aryImageFunction[$aryImageInfo['mime']];    
        $objImageCreate            = $aryExcuteFunction['CreateFrom']($arg_strFileName);        
        $intThumbHt                = round($aryImageInfo[1] * $arg_intThumbWd / $aryImageInfo[0]);
        $objTargetImageCreate    = imageCreateTrueColor($arg_intThumbWd,$intThumbHt);       
        imageCopyResampled($objTargetImageCreate, $objImageCreate, 0, 0, 0, 0, $arg_intThumbWd, $intThumbHt, $aryImageInfo[0], $aryImageInfo[1]);      
        $aryExcuteFunction['OutPutFrom']($objTargetImageCreate);      
        imageDestroy($objImageCreate);
        imageDestroy($objTargetImageCreate);
    }
    else
    {
        echo $aryImageInfo['mime'].' images are not supported<br />';
        exit;
    }        
} 
__________________
有空來灌點水...
http://tw.myblog.yahoo.com/jw!v9EKjxOXCkSQzfYe5uE-/
陳醉欣 目前離線   回覆時引用此篇文章
舊 2007-01-18, 12:49 PM   #5
Senior Member
 
註冊日期: 2005-05-29
住址: http://mamba.zapto.org/bbs/
文章: 119
預設
第四版.........
PHP 代碼:
function makeThumbnail($arg_strFileName, $arg_intThumbWd = 100)
{
    $aryImageInfo   = getImageSize($arg_strFileName);  
    $intThumbHt        = 0;    
    $aryImageFunction = array(
        'image/gif' => 
            array(
                'CreateFrom'=>'imageCreateFromGIF',
                'OutPutFrom'=>'imagegif'                            
        ),
        'image/jpeg' => 
            array(
                'CreateFrom'=>'imageCreateFromJPEG',
                'OutPutFrom'=>'imagejpeg'    
        ),
        'image/png' => 
            array(
                'CreateFrom'=>'imageCreateFromPNG',
                'OutPutFrom'=>'imagepng'    
        ),
        'image/wbmp' => 
            array(
                'CreateFrom'=>'imageCreateFromWBMP',
                'OutPutFrom'=>'imagewbmp'    
        )    
    );    
    if(array_key_exists($aryImageInfo['mime'],$aryImageFunction))
    {        
        $objImageCreate         = $aryImageFunction[$aryImageInfo['mime']]['CreateFrom']($arg_strFileName);          
        $intThumbHt             = round($aryImageInfo[1] * $arg_intThumbWd / $aryImageInfo[0]);
        $objTargetImageCreate   = imageCreateTrueColor($arg_intThumbWd,$intThumbHt); 
        imageCopyResampled($objTargetImageCreate, $objImageCreate, 0, 0, 0, 0, $arg_intThumbWd, $intThumbHt, $aryImageInfo[0], $aryImageInfo[1]);      
        $aryImageFunction[$aryImageInfo['mime']]['OutPutFrom']($objTargetImageCreate);      
        imageDestroy($objImageCreate);
        imageDestroy($objTargetImageCreate);
    }
    else
    {
        echo $aryImageInfo['mime'].' images are not supported<br />';
        exit;
    }        
} 
__________________
有空來灌點水...
http://tw.myblog.yahoo.com/jw!v9EKjxOXCkSQzfYe5uE-/
陳醉欣 目前離線   回覆時引用此篇文章
舊 2007-01-18, 01:39 PM   #6
Senior Member
 
註冊日期: 2005-05-29
住址: http://mamba.zapto.org/bbs/
文章: 119
預設
第五版.......
呼叫Function後自動發送標頭
PHP 代碼:
 function makeThumbnail($arg_strFileName, $arg_intThumbWd = 100)
 {
     $aryImageInfo   = getImageSize($arg_strFileName);  
     $intThumbHt        = 0;    
     $aryImageFunction = array(
         'image/gif' => 
             array(
                 'CreateFrom'=>'imageCreateFromGIF',
                 'OutPutFrom'=>'imagegif'                            
         ),
         'image/jpeg' => 
             array(
                 'CreateFrom'=>'imageCreateFromJPEG',
                 'OutPutFrom'=>'imagejpeg'    
         ),
         'image/png' => 
             array(
                 'CreateFrom'=>'imageCreateFromPNG',
                 'OutPutFrom'=>'imagepng'    
         ),
         'image/wbmp' => 
             array(
                 'CreateFrom'=>'imageCreateFromWBMP',
                 'OutPutFrom'=>'imagewbmp'    
         )    
     );    
     if(array_key_exists($aryImageInfo['mime'],$aryImageFunction))
     {        
         header('Content-type: ' . $aryImageInfo['mime']);
         $objImageCreate         = $aryImageFunction[$aryImageInfo['mime']]['CreateFrom']($arg_strFileName);          
         $intThumbHt             = round($aryImageInfo[1] * $arg_intThumbWd / $aryImageInfo[0]);
         $objTargetImageCreate   = imageCreateTrueColor($arg_intThumbWd,$intThumbHt); 
         imageCopyResampled($objTargetImageCreate, $objImageCreate, 0, 0, 0, 0, $arg_intThumbWd, $intThumbHt, $aryImageInfo[0], $aryImageInfo[1]);      
         $aryImageFunction[$aryImageInfo['mime']]['OutPutFrom']($objTargetImageCreate);  
         
         imageDestroy($objImageCreate);
         imageDestroy($objTargetImageCreate);
     }
     else
     {
         echo $aryImageInfo['mime'].' images are not supported<br />';
         exit;
     }        
 } 
__________________
有空來灌點水...
http://tw.myblog.yahoo.com/jw!v9EKjxOXCkSQzfYe5uE-/
陳醉欣 目前離線   回覆時引用此篇文章
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