用php GD库 处理完图片后 只能将图片 用 imagejpeg() 输出 或者写入一个文件很多时候并不需要这么做 比如要将图片存入数据库 就需要把图片写入变量保存用 ob_start() 启用缓存 ob_get_contents()获取缓存就可以将图片写入变量
实例代码如下:
- <?php
- $imgPath ="图片地址" ;
- //获得图片信息 $imgPath 可以为远程地址
- list( $srcWidth, $srcHeight, $type ) = getimagesize( $imgPath );
- …
- switch( $type ) {
- case 1: $imgCreate = 'ImageCreateFromGIF'; break;
- case 2: $imgCreate = 'ImageCreateFromJPEG'; break;
- case 3: $imgCreate = 'ImageCreateFromPNG'; break;
- default: return false;
- }
- $orig = $imgCreate( $imgPath );
- …
- //开启缓存
- ob_start();
- //生成图片
- switch ($type)
- {
- case 1: imagegif($orig); break;
- case 2: imagejpeg($orig); break; // best quality
- case 3: imagepng($orig); break; // no compression
- default: echo ''; break;
- }
- //将图片存入变量
- $imageCode = ob_get_contents();
- ob_end_clean();
个人不建义把图片保存在变量 了,这样会比较浪费资源 ,这里也是测试好玩的哦.
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波比源码 » php ob_start()实现图片存入变量程序
波比源码 » php ob_start()实现图片存入变量程序
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