如何正确实现PHP生成唯一标识符
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PHP生成唯一标识符代码示例：
- ?
- //生成唯一标识符
- //sha1()函数， "安全散列算法（SHA1）"
- function create_unique() {
- $data = $_SERVER['HTTP_USER_AGENT'] . $_SERVER['REMOTE_ADDR']
- .time() . rand();
- return sha1($data);
- //return md5(time().$data);
- //return $data;
- }
- ?>
PHP生成唯一标识符函数描述及例子
<ol class="dp-xml"> <li class="alt"><span><span class="tag"><span> ? </span></span></span></li> <li> <span>$</span><span class="attribute">newhash</span><span> = </span><span class="attribute-value">create_unique</span><span>(); </span> </li> <li class="alt"><span>echo $newhash; </span></li> <li> <span class="tag">?></span><span> </span> </li> <li class="alt"><span> </span></li> </ol>
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