Example explanation of adding counter in PHP_PHP tutorial

When we build a website, some webmasters will need to add a counter on their homepage. Today we will tell you in detail counter.inc contains the following code:

<ol class="dp-xml"><li class="alt"><span><span class="tag"><strong><font color="#006699"><?</FONT></STRONG></SPAN><SPAN>   </SPAN></SPAN><LI class=""><SPAN>/*   </SPAN><LI class=alt><SPAN>|| 一个简单的计数器   </SPAN><LI class=""><SPAN>*/   </SPAN><LI class=alt><SPAN>function get_hitcount($counter_file)   </SPAN><LI class=""><SPAN>{   </SPAN><LI class=alt><SPAN>/* 将计数器归零   </SPAN><LI class=""><SPAN>这样如果计数器还未被使用，初始值将是1   </SPAN><LI class=alt><SPAN>你当然也可以把初始值设成20000来骗人咯   </SPAN><LI class=""><SPAN>*/   </SPAN><LI class=alt><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>count</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>0</FONT></SPAN><SPAN>;   </SPAN></SPAN><LI class=""><SPAN>// 如果存放计数器文件已经存在，读取其中的内容   </SPAN><LI class=alt><SPAN>if ( file_exists($counter_file) )   </SPAN><LI class=""><SPAN>{   </SPAN><LI class=alt><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>fp</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>fopen</FONT></SPAN><SPAN>($counter_file,"r");   </SPAN></SPAN><LI class=""><SPAN>// 我们只取了前20位，希望你的站点不要太受欢迎啊   </SPAN><LI class=alt><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>count</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>0</FONT></SPAN><SPAN>+fgets($fp,20);   </SPAN></SPAN><LI class=""><SPAN>// 由于函数fgets()返回字符串，我们可以通过加0的方法将其自动转换为整数   </SPAN><LI class=alt><SPAN>fclose($fp);   </SPAN><LI class=""><SPAN>// 对文件操作完毕   </SPAN><LI class=alt><SPAN>}   </SPAN><LI class=""><SPAN>// 增加一次计数值   </SPAN><LI class=alt><SPAN>$count++;   </SPAN><LI class=""><SPAN>// 将新的计数值写入文件   </SPAN><LI class=alt><SPAN>$</SPAN><SPAN class=attribute><FONT color=#ff0000>fp</FONT></SPAN><SPAN>=</SPAN><SPAN class=attribute-value><FONT color=#0000ff>fopen</FONT></SPAN><SPAN>($counter_file,"w");   </SPAN></SPAN><LI class=""><SPAN>fputs($fp,$count);   </SPAN><LI class=alt><SPAN>fclose($fp);   </SPAN><LI class=""><SPAN># 返回计数值   </SPAN><LI class=alt><SPAN>return ($count);   </SPAN><LI class=""><SPAN>}   </SPAN><LI class=alt><SPAN></SPAN><SPAN class=tag><STRONG><FONT color=#006699>?></font></strong></span><span>   </span></span></li></ol>

The next step after PHP adds the counter is that we need to change the front.php3 file to display this counter:

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><strong><font color="#006699"><?</FONT></STRONG></SPAN><SPAN>   </SPAN></SPAN><LI class=""><SPAN></SPAN><SPAN class=tag-name><STRONG><FONT color=#006699>include</FONT></STRONG></SPAN><SPAN>("include/counter.inc");   </SPAN></SPAN><LI class=alt><SPAN>// 我把计数值放在文件counter.txt中，读出并输出   </SPAN><LI class=""><SPAN>printf ("</SPAN><STRONG><FONT color=#006699><SPAN class=tag><</SPAN><SPAN class=tag-name>CENTER</SPAN><SPAN class=tag>></font></strong></span><span class="tag"><</SPAN><SPAN class=tag-name>B</SPAN><SPAN class=tag>></span><span>%06d</span><strong><font color="#006699"><span class="tag"></</SPAN><SPAN class=tag-name>B</SPAN><SPAN class=tag>></span><span class="tag"></</SPAN><SPAN class=tag-name>CENTER</SPAN><SPAN class=tag>></span></font></strong><span> </span><strong><font color="#006699"><span class="tag"><</SPAN><SPAN class=tag-name>BR</SPAN><SPAN class=tag>></span></font></strong><span> n",   </span></span></li>
<li class="alt"><span>get_hitcount("counter.txt"));   </span></li>
<li class=""><span>include("include/footer.inc");   </span></li>
<li class="alt">
<span></span><span class="tag"><strong><font color="#006699">?></font></strong></span><span>   </span>
</li>
</ol>

All the above codes are the implementation of adding counter in PHP. I hope it will be helpful to friends in need.

http://www.bkjia.com/PHPjc/446342.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/446342.htmlTechArticleWhen we build the website, some webmasters will need to add a counter on their homepage. We will do it today. Let me tell you in detail that counter.inc contains the following code: ? /* ||A simple...