Extra long text paging display function implemented in PHP-PHP Tutorial-php.cn

Extra long text paging display function implemented in PHP

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Release： 2023-03-29 18:56:01

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This article mainly introduces the paging display function of ultra-long text implemented by PHP, involving PHP's calculation, interception, traversal and other related operation skills for strings. It can realize the paging display function of ultra-long text. Friends who need it can Refer to the following

The example of this article describes the paging display function of ultra-long text implemented in PHP. Share it with everyone for your reference, the details are as follows:

1. Code

1, index.php

<?php if ($_GET=="") {$_GET=1;};  include("function.php");?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>超长文本的分页显示</title>
</head>
<style type="text/css">
<!--
body {
  margin-left: 0px;
  margin-top: 0px;
  margin-right: 0px;
  margin-bottom: 0px;
}
a:link {
  text-decoration: none;
}
a:visited {
  text-decoration: none;
}
a:hover {
  text-decoration: none;
}
a:active {
  text-decoration: none;
}
.STYLE3 {color: #333333; font-size: 13px; }
-->
</style>
<body>
  <table width="876" height="638" border="0" align="center" cellpadding="0" cellspacing="0">
   <tr>
    <td width="343" height="159"> </td>
    <td width="489"> </td>
    <td width="44"> </td>
   </tr>
   <tr>
    <td height="245"> </td>
    <td align="center" valign="top"><table width="480" border="0" cellspacing="0" cellpadding="0">
   <tr>
    <td height="22" colspan="2">
     <span class="STYLE3">
     <?php
//读取超长文本中的数据，实现超长文本中数据的分页显示
 if($_GET){
   $counter=file_get_contents("file/file.txt");
   $length=strlen($counter);
   $page_count=ceil($length/950);
   $c=msubstr($counter,0,($_GET-1)*950);
   $c1=msubstr($counter,0,$_GET*950);
    echo substr($c1,strlen($c),strlen($c1)-strlen($c));
 }
?>
     </span> </td>
   </tr>
    <tr>
    <td width="202" height="22"><span class="STYLE3">页次：<?php echo $_GET;?> / <?php echo $page_count;?> 页 </span></td>
    <td width="278"><span class="STYLE3">分页：
      <?php
       if($_GET!=1){
           echo "<a href=index.php?page=1>首页</a> ";
           echo "<a href=index.php?page=".($_GET-1).">上一页</a> ";
          }
         if($_GET<$page_count){
            echo "<a href=index.php?page=".($_GET+1).">下一页</a> ";
            echo "<a href=index.php?page=".$page_count.">尾页</a>";
          }
       ?>
    </span></td>
   </tr>
</table>
</td>
    <td> </td>
   </tr>
   <tr>
    <td height="234"> </td>
    <td> </td>
    <td> </td>
   </tr>
</table>
</body>
</html>

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2 , function.php

<?php
//定义一个用于截取一段字符串的函数msubstr()
  function msubstr($str,$start,$len){     //$str指的是字符串,$start指的是字符串的起始位置，$len指的是长度。
    $strlen=$start+$len;          //用$strlen存储字符串的总长度（从字符串的起始位置到字符串的总长度）
    for($i=0;$i<$strlen;$i++){        //通过for循环语句,循环读取字符串
      if(ord(substr($str,$i,1))>0xa0){   //如果字符串中首个字节的ASCII序数值大于0xa0,则表示为汉字
        $tmpstr.=substr($str,$i,2);   //每次取出两位字符赋给变量$tmpstr，即等于一个汉字
        $i++;              //变量自加1
      }else{               //如果不是汉字，则每次取出一位字符赋给变量$tmpstr
        $tmpstr.=substr($str,$i,1);
      }
    }
    return $tmpstr;             //输出字符串
  }
?>

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2. Running results

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