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php ob_start()实现图片存入变量程序

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Release: 2016-06-13 10:15:29
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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

 代码如下 复制代码

$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。

source:php.cn
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