Create a Embed-count folder
Under the Embed-count folder, create a counter.inc.php file that reads as follows:
<?phpfunction counter () { $counter = 0; Initialize variable $max _len = 8; $LJ = Explode ("/", $_server["php_self"]); Hyper global variable $_server[' php_self ' saves the name of the currently running script 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;}? >Under the Embed-count folder, create a al_embed_fn.php file that reads as follows:
<?php include "counter.inc.php";? >OK, after typing done, is it just a function of encapsulating the code?
Yes, but this time we've used a lot of new functions and tricks. Let me give you one by one.
Little Tricks
1. Most PHP programmers are accustomed to the name "Inc" of the file extension of include or require;
2. $CounterFile = "./counter/". $lj [Count ($LJ)-1]. ". DAT "; Locate the counter file in the subfolder under the folder where the current script is located counter, the file with the current script name plus" dat "name, that is Al_Embed_Fn.php.dat
3.<?php include "counter.inc.php"?> to embed the counter function in a Web page that should precede the <HTML> tag Counter.inc.php is saved in the same folder as the Web page, otherwise the file's storage path is indicated in the Include
4.<?php counter ();?> calls the counter () function, which returns the value of the counter
Well, the embedded of this function call is also done.Here are a few functions to say.
mkdir (DirName ($CounterFile), 0777): establishes a directory with the value of $counterflile, that is, the./counter, the access permission of the directory is the highest (readable writable executable);
DirName ($CounterFile): Returns the directory portion of the path
Explode ('/', $_server[php_self]): Returns an array of strings, each of which is $_server[php_self] "/" as a substring of the boundary cut out
Count ($LJ): counts the number of elements in an array &lj
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