Use PHP to write counters (detailed introduction)_PHP tutorial

/* Define text file to store data*/
$counterFile="counter.dat";
/ * Define a mark to identify whether the data to be recorded is already in the text data */
$sign=False;
/* Read the data into the variable $sounterData in the form of an array for later use, */
$counterData=file($counterFile);
/* Use the count() function to calculate how many records there are*/
/* Use the explode() function to separate $counterData[$i] by the symbol "|" , and send it back to the variable $varArray in the form of an array */
/* The function implode() is just the opposite of explode(), connecting the array $varArray with the symbol "|" and sending it back to $counterData */
/* Also used the environment variable $PATH_INFO
for($i=0;$i<=count($counterData)-1;$i++)
　{
　$varArray=explode("| ",$counterData[$i]);
if ($varArray[0]==$GLOBALS["REQUEST_URI"])
　{
　$varArray[1]++;
print( $varArray[1]);
　 $counterData[$i]=implode("|", $varArray);
$sign=True;
/* After finding the location of this record, use break Exit the loop*/
break; >/* In this way, the I/O usage of the server is reduced to the lowest point
$data=implode("",$counterData);
/* Open the text file and write the data*/
$fp=fopen($counterFile,"w");
fputs($fp,$data);
/* If the data to be recorded is not in the text, mark $sign= Flase, then enter it in the text Add data*/
if (!$sign) {fputs($fp,"\n".$GLOBALS["REQUEST_URI"]."|"."1"."|");
print( "1");
/* Close data file*/
fclose($fp);
?>




We have seen the working process of this program and we all know the idea, but if it is written like this in every file, wouldn’t it be too troublesome.
Don’t panic! We also have PHP provided What about the powerful require() function! We write counter.php as a function, which makes it much easier to use. So what are you waiting for? Here is the function you want:
counter.inc

function Counter()
{
$counterFile="/freespace/sucre/public_html/counter.dat";
$counterData=file($counterFile );
$sign=False;
for($i=0;$i<=count($counterData)-1;$i++)
　 {
$varArray=explode("|" ,$counterData[$i]);
if ($varArray[0]==$GLOBALS["REQUEST_URI"])
{
$varArray[1]++;
print($ varArray[1]);
$counterData[$i]=implode("|", $varArray);
$sign=True; break;
}
}
$data= implode("",$counterData);
$fp=fopen($counterFile,"w");
fputs($fp,$data);
if (!$sign)
{
fputs($fp,"\n".$GLOBALS["REQUEST_URI"]."|"."1"."|");
print("1");
}
　fclose($fp);
}
?>
The best way to test is "practice". Let's see how we call it. Let's look at an example first:
counterTest.php
require("counter.inc");
?>





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