PHP图片缩放
/** * 图片缩放 */ function resizeImage($p_w_picpath, $prefix = '', $width = 266, $compression = 0) { //判断操作系统转换图片名称编码 if(strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') { $p_w_picpath = iconv('utf-8', 'gbk', $p_w_picpath); } //获取图片相关信息 $imgInfo = getp_w_picpathsize($p_w_picpath); $imgInfo['width'] = $imgInfo[0]; $imgInfo['height'] = $imgInfo[1]; $width = $imgInfo['width'] < $width ? $imgInfo['width'] : $width; if(!empty($imgInfo['width']) && !empty($imgInfo['height'])) { switch ($imgInfo['mime']) { case 'p_w_picpath/jpeg': $imgRes = p_w_picpathcreatefromjpeg($p_w_picpath); break; case 'p_w_picpath/gif': $imgRes = p_w_picpathcreatefromgif($p_w_picpath); break; case 'p_w_picpath/png': $imgRes = p_w_picpathcreatefrompng($p_w_picpath); break; case 'p_w_picpath/bmp': $imgRes = p_w_picpathcreatefromwbmp($p_w_picpath); break; } if($imgRes) { $proportion = $width / $imgInfo['width']; $height = $imgInfo['height'] * $proportion; $white = p_w_picpathcreatetruecolor($width, $height); //缩小图片 p_w_picpathcopyresampled($white, $imgRes, 0, 0, 0, 0, $width, $height, $imgInfo['width'], $imgInfo['height']); $imgName = $prefix ? $prefix . $this->nameToChina($p_w_picpath) : $this->nameToChina($p_w_picpath); $p_w_picpathName = dirname($p_w_picpath) . DS . $imgName; if(file_exists($p_w_picpathName)) { unlink($p_w_picpathName); } if(!$compression) { p_w_picpathpng($white, $p_w_picpathName); } else { p_w_picpathjpeg($white,$p_w_picpathName); } //销毁资源 p_w_picpathdestroy($white); p_w_picpathdestroy($imgRes); } } }
网站名称:PHP图片缩放
标题来源:http://scyanting.com/article/peehdp.html