A.首先在网站后台系统中设置网站缩略图尺寸大小和模板中调用图片最大尺寸相同。B.再打开文件”include/helpers/extend.helpes.php”在最下面加上以下代码??? if ( ! function_exists(‘thumb’)) ??? { ??? function thumb($imgurl, $width, $height, $bg = true) ??? { ??? global $cfg_mainsite,$cfg_multi_site; ??? $thumb = eregi(“http://”,$imgurl)?str_replace($cfg_mainsite,”,$imgurl):$imgurl; ??? list($thumbname,$extname) = explode(‘.’,$thumb); ??? $newthumb = $thumbname.’_’.$width.’_’.$height.’.’.$extname; ??? if(!$thumbname || !$extname || !file_exists(DEDEROOT.$thumb)) return $imgurl; ??? if(!file_exists(DEDEROOT.$newthumb)) ??? { ??? include_once DEDEINC.’/image.func.php’; ??? if($bg==true) ??? { ??? ImageResizeNew(DEDEROOT.$thumb, $width, $height, DEDEROOT.$newthumb); ??? } ??? else ??? { ??? ImageResize(DEDEROOT.$thumb, $width, $height, DEDEROOT.$newthumb); ??? } ??? } ??? return $cfg_multi_site==’Y’?$cfg_mainsite.$newthumb:$newthumb; ??? } ??? }调用方法：标签 ： [field:picname function=’thumb(@me,$width,$height,$bg)’/]参数说明：$width:缩略图宽度（整数）$height:缩略图高度（整数）$bg:是否用空白填补，默认自动填补，背景填充颜色在系统-附件设置里（true/false）举例：调用长宽为100像素的缩略图：[field:picname function=’thumb(@me,100,100)’/]保留原有比例，不自动填充（不建议）：[field:picname function=’thumb(@me,100,100,false)’/]—-C.再到 include/helpers/image.helpes.php 中写入以下代码/** ??? * 缩图片自动生成函数，来源支持bmp、gif、jpg、png ??? * 但生成的小图只用jpg或png格式 ??? * @access public ??? * @param string $srcFile??? * @param string $toW 转换到的宽度 ??? * @param string $toH 转换到的高度??? * @param string $toFile 输出文件到 ??? * @return string ??? */ ??? if ( ! function_exists(‘ImageResize’)) ??? { ??? function ImageResize($srcFile, $toW, $toH, $toFile=””) ??? { ??? global $cfg_photo_type; ??? if($toFile==””) ??? { ??? $toFile = $srcFile; ??? } ??? $info = “”; ??? $srcInfo = GetImageSize($srcFile,$info); ??? switch ($srcInfo[2]) ??? { ??? case 1: ??? if(!$cfg_photo_type[‘gif’]) ??? { ??? return false; ??? } ??? $im = imagecreatefromgif($srcFile); ??? break; ??? case 2: ??? if(!$cfg_photo_type[‘jpeg’]) ??? { ??? return false; ??? } ??? $im = imagecreatefromjpeg($srcFile); ??? break; ??? case 3: ??? if(!$cfg_photo_type[‘png’]) ??? { ??? return false; ??? } ??? $im = imagecreatefrompng($srcFile); ??? break; ??? case 6: ??? if(!$cfg_photo_type[‘bmp’]) ??? { ??? return false; ??? } ??? $im = imagecreatefromwbmp($srcFile); ??? break; ??? } ??? $srcW=ImageSX($im); ??? $srcH=ImageSY($im); ??? if($srcW<=$toW && $srcH<=$toH ) ??? { ??? return true; ??? } ??? //缩略生成并裁剪 ??? $newW = $toH * $srcW / $srcH; ??? $newH = $toW * $srcH / $srcW; ??? if($newH >= $toH) ??? { ??? $ftoW = $toW; ??? $ftoH = $newH; ??? } ??? else ??? { ??? $ftoW = $newW; ??? $ftoH = $toH; ??? } ??? if($srcW>$toW||$srcH>$toH) ??? { ??? if(function_exists(“imagecreatetruecolor”)) ??? { ??? @$ni = imagecreatetruecolor($ftoW,$ftoH); ??? if($ni) ??? { ??? imagecopyresampled($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH); ??? } ??? else ??? { ??? $ni=imagecreate($ftoW,$ftoH); ??? imagecopyresized($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH); ??? } ??? } ??? else ??? { ??? $ni=imagecreate($ftoW,$ftoH); ??? imagecopyresized($ni,$im,0,0,0,0,$ftoW,$ftoH,$srcW,$srcH); ??? } ??? //裁剪图片成标准缩略图 ??? $new_imgx = imagecreatetruecolor($toW,$toH); ??? if($newH >= $toH) ??? { ??? imagecopyresampled($new_imgx,$ni,0,0,0,($newH – $toH)/2,$toW,$toH,$toW,$toH); ??? } ??? else ??? { ??? imagecopyresampled($new_imgx,$ni,0,0,($newW – $toW)/2,0,$toW,$toH,$toW,$toH); ??? } ??? switch ($srcInfo[2]) ??? { ??? case 1: ??? imagegif($new_imgx,$toFile); ??? break; ??? case 2: ??? imagejpeg($new_imgx,$toFile,85); ??? break; ??? case 3: ??? imagepng($new_imgx,$toFile); ??? break; ??? case 6: ??? imagebmp($new_imgx,$toFile); ??? break; ??? default: ??? return false; ??? } ??? imagedestroy($new_imgx); ??? imagedestroy($ni); ??? } ??? imagedestroy($im); ??? return true; ??? } ??? }
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坚韧是成功的一大要素，只要在门上敲得够久够大声，终会把人唤醒的。
