This article mainly introduces PHP functions to embed website visit counters in detail, which has certain reference value. Interested friends can refer to it
Create Embed-Count Folder
Create the counter.inc.php file under the Embed-Count folder with the following content:
<?php
function counter(){
$counter = 0; //初始化变量
$max_len = 8;
$lj = explode("/",$_SERVER["PHP_SELF"]);
//超全局变量$_SERVER['PHP_SELF']保存了当前运行脚本的名字 Embed_Count/al_Embed_Fn.php
$CounterFile="./counter/".$lj[count ($lj)-1].".dat";
if(!file_exists($CounterFile)){
if(!file_exists(dirname($CounterFile))){
mkdir(dirname($CounterFile),0777);
}
$cf = fopen($CounterFile,'w');
fputs($cf,'0');
fclose($cf);
}
else{
$cf = fopen($CounterFile,'r');
$counter = trim(fgets($cf,$max_len));
fclose($cf);
}
$counter++;
$cf = fopen($CounterFile,'w');
fputs($cf,$counter);
fclose($cf);
echo $counter;
}
?>Create the al_Embed_Fn.php file under the Embed-Count folder with the following content:
<?php
include "counter.inc.php";
?>
<html>
<head>
<meta charset="UTF-8">
<title>嵌入式网页计数器-刘佳晨</title>
</head>
<body>
<p id="dd">
<span>欢迎您！</span>
<span>您是本网站的第<?php counter(); ?>位访客</span>
</p>
</body>
</html>Okay, after typing, did you find that you just encapsulated the code into a function?
Yes, but this time many new functions and tricks are used. Let me give you one.
Tips
1. Most PHP programmers are accustomed to naming the file extension of include or require as "inc";
2. $CounterFile="./counter/".$lj[count ($lj)-1].".dat"; Locate the counter file in the subfolder counter under the folder where the current script is located. The file is named with the name of the current script. Add "dat" as the name, that is, al_Embed_Fn.php.dat
3. To embed the counter function into the web page, this script should be placed before the tag; counter.inc.php is saved in the same folder as the web page, otherwise the file storage path must be specified in include
4.Okay, the embedding of this function call is also done.
There are several functions that need to be mentioned here.
mkdir(dirname($CounterFile),0777): Create a directory named with the value of $CounterFlile, that is, ./counter. The access permissions of the directory are the highest permissions (readable, writable and executable);
dirname($CounterFile): Returns the directory part of the path
explode('/',$_SERVER[PHP_SELF]): Returns a string array, each element is $_SERVER[PHP_SELF ] Substring cut out by "/" as a boundary
count($lj): Count the number of elements in the array &lj
Are you looking forward to my next version?
Related recommendations:
How to use PHP to make your own counter
Using CSS counters and multiple columns
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