Thinkphp自定义生成缩略图尺寸的方法

function getLogo($logo, $width, $height, $name) {    $fileArr = pathinfo($logo);    $dirname = $fileArr['dirname'];    $filename = $fileArr['filename'];    $extension = $fileArr['extension'];    $logo_rs = "";    if ($width > 0 && $height > 0) {      $name_thumb = $dirname . "/" . $filename . "_" . $width . "_" . $height . "." . $extension;      if (!file_exists($name_thumb)) {        if (file_exists($logo)) {          $image = new /Think/Image();          $image->open($logo);          $image->thumb($width, $height)->save($name_thumb);        } else {          $name_thumb = "";        }      }      if ($name_thumb) {        $logo_rs = $name_thumb;      }    } else {      $logo_rs = $logo;    }    if ($logo_rs) {      if ($name) {        return "<img src='" . __APP__ . "/" . $logo_rs . "'     } else {        return __APP__ . "/" . $logo_rs;      }    }  }

<img alt="350*350" src="{$logo|getLogo=###,350,350}" />