php生成随机密码的方法 3

[php]代码库

<code class="php" style="margin:0px; padding:0px; border:0px; font-size:10px; vertical-align:baseline; font-family:Monaco,Menlo,Consolas,'Courier New',monospace; color:inherit; background-color:transparent"> 
<span class="php__keyword" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; font-weight:bold; color:navy">function</span> getmicrotime(){ 
    <span class="php__keyword" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; font-weight:bold; color:navy">list</span>(<span class="php__keyword" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; font-weight:bold; color:navy">$</span><span class="php__variable" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; color:rgb(64,64,194)">usec</span>, <span class="php__keyword" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; font-weight:bold; color:navy">$</span><span class="php__variable" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; color:rgb(64,64,194)">sec</span>) = explode(<span class="php__string2" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; color:fuchsia">" "</span>,microtime()); 
    <span class="php__keyword" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; font-weight:bold; color:navy">return</span> ((float)<span class="php__keyword" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; font-weight:bold; color:navy">$</span><span class="php__variable" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; color:rgb(64,64,194)">usec</span> + (float)<span class="php__keyword" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; font-weight:bold; color:navy">$</span><span class="php__variable" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; color:rgb(64,64,194)">sec</span>); 
} 
  
<span class="php__com" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; color:green">// 记录开始时间</span> 
<span class="php__keyword" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; font-weight:bold; color:navy">$</span><span class="php__variable" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; color:rgb(64,64,194)">time_start</span> = getmicrotime(); 
     
<span class="php__com" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; color:green">// 这里放要执行的PHP代码，如:</span> 
<span class="php__com" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; color:green">// echo create_password(6);</span> 
  
<span class="php__com" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; color:green">// 记录结束时间</span> 
<span class="php__keyword" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; font-weight:bold; color:navy">$</span><span class="php__variable" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; color:rgb(64,64,194)">time_end</span> = getmicrotime(); 
<span class="php__keyword" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; font-weight:bold; color:navy">$</span><span class="php__variable" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; color:rgb(64,64,194)">time</span> = <span class="php__keyword" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; font-weight:bold; color:navy">$</span><span class="php__variable" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; color:rgb(64,64,194)">time_end</span> - <span class="php__keyword" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; font-weight:bold; color:navy">$</span><span class="php__variable" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; color:rgb(64,64,194)">time_start</span>; 
 
 <span class="php__com" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; color:green">// 输出运行总时间 </span> 
<span class="php__keyword" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; font-weight:bold; color:navy">echo</span> <span class="php__string2" style="margin:0px; padding:0px; border:0px; vertical-align:baseline; color:fuchsia">"执行时间 $time seconds"</span>; 
</code>