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php动态生成函数示例_PHP

WBOY
WBOYOriginal
2016-06-01 11:55:44736browse

以下就是php动态生成函数示例,示例中用到了eval函数,我感觉如果服务器上允许用户运行这样的函数是非常危险的

复制代码 代码如下:

$a['a']=1;
$a['b']=1;
$a['c']=1;
$str="function a(){global \$a;if(\$a['a']==1 && \$a['b']==1 && \$a['c']==1){return 'OK';}else{return 'ERR';}}";
eval($str);
if(a()=="OK"){
 echo "GOOD";
}else{
 echo "OH NO";
}

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