Simple PHP Counter

//DECLARE YOUR COUNTER FILE
$counterFile="counter.txt";

//INCREMENT THE COUNTER
incrementCounter($counterFile);

//OUTPUT THE CURRENT COUNT
echo readCounter($counterFile);


function incrementCounter($counterFile)
{
$current=readCounter($counterFile);
$current++;

if(!$handle = fopen($counterFile, "w"))
{
return false;
}
else
{
if(fwrite($handle, $current) === FALSE)
{
return false;
}
}
fclose($handle);
return true;
}

function readCounter($counterFile)
{
$contents=file_get_contents($counterFile);
if(is_numeric((int)$contents))
{
return ((int)$contents);
}
else
{
return 0;
}
}
?>

facebox not loading for content loaded from ajax/jquery

For solving this issue, after loading content using jquery/ajax call the facebox init function again from it.

for eg:

$.post(abc.com/fun.php",{sort:sort_field},function (data){   
                           
                $("#tbl_product_list tbody").html(data);
                $('a[rel*=modals]').facebox() ;
            });

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Onkeypress Javascript Numeric and Decimal Validation

Step : 1
Form Input Text Box:

Step : 2
Now place javascript validation code in the head or external javascript file like validation.js

function digits(obj, e, allowDecimal, allowNegative)
{
 var key;
 var isCtrl = false;
 var keychar;
 var reg;
  
 if(window.event) {
  key = e.keyCode;
  isCtrl = window.event.ctrlKey
 }
 else if(e.which) {
  key = e.which;
  isCtrl = e.ctrlKey;
 }
 
 if (isNaN(key)) return true;
 
 keychar = String.fromCharCode(key);
 
 // check for backspace or delete, or if Ctrl was pressed
 if (key == 8 || isCtrl)
 {
  return true;
 }

 reg = /\d/;
 var isFirstN = allowNegative ? keychar == '-' && obj.value.indexOf('-') == -1 : false;
 var isFirstD = allowDecimal ? keychar == '.' && obj.value.indexOf('.') == -1 : false;
 
 return isFirstN || isFirstD || reg.test(keychar);
}

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PHP include statement

Sometimes we need to re-use same code in different PHP files such as Header file. We use same header file in different page. For that reason we need to write same code in different page. It is time consuming and not good way of writing PHP code. To solve this problem we use PHP include() statement.

PHP include() statement Structure

Now the question is how we use PHP include() statement in our code. We use include syntax to add same type of code. Suppose that, we want to add header.php file in register.php file. We write include("header.php") in the register.php file. So the structure of include() statement is

                        include("file name or file path")
                 include("header.php")   

 

PHP include statement example

Think that we have a file name title.php that show the title in header.php file. So we write the title.php file.

<?php
echo "PHP Tutorials"; 
?> 

And our header.php file is

<html>
<title>
<?php
include("title.php");
?>
</title> 

Now we think that we add the header.php file in register.php file. So the code is

<?php
include("header.php");
?>
<form method="post" action="">
Username:<input type="">
Password: <input type="">
</form>
</html>

In that way we can use include statement in any place of the PHP code.

Important Note: One important question is if the include statement do not found the path or we do not add the path what will occur. The answer is nothing will occur, it just produce a warning message (E_WARNING) and your code will continue. So try to write a PHP code where the include statement missing the path. And then try to understand what will occur.  

DateAdd

I do a lot of business application programming. Accounting deals a lot with dates so my first batch of functions will more than likely be Date and Numeric functions because I use them a lot. The DateAdd function is really useful when building reports. For those that are familiar with ColdFusion, I do not use a few of the defaults in the ColdFusion version of this function.

datepart: yyyy - Year m - Month d - Day ww - Week h - Hour n - Minute s - Second l - Millisecond

action: If you are adding, use "+" or "-" for subtraction

number: Number of units of datepart to add to date (positive,to get dates in the future; negative, to get dates in the past). Number must be an integer.

date Date/time object, in the range 100 AD–9999AD.

The Function:

<?php function DateAdd($datepart,$action,$number, $date) { $adbit = explode(" ",$date); $bdbit = explode("-",$adbit[0 ]); if(count($adbit) > 1) { $cdbit = explode(":",$adbit[1]); } else { $cdbit = array(); $cdbit[0] = 0; $cdbit[1] = 0; $cdbit[2] = 0; } switch($datepart) { case "l": // Millisecond (Lower case 'L') $e = 60/1000; break; case "s": // Second $e = 1 ; break; case "n": // Minute $e = 60; break; case "h": // Hour $e = 60*60; break; case "ww": // Week $e = ((60*60)*24)*7; break; case "d": // Day $e = (( 60*60)*24); break; case "m": // Month $e = (((60* 60)*24)*365)/12; break; case "yyyy": // Year $e = (((60* 60)*24)*365); break; default: $e = "error"; } if($e == "error") { return false; } $intTime = mktime($cdbit[0],$cdbit[1],$cdbit[ 2],$bdbit[1],$bdbit[2],$bdbit[0]); if($action == "+") { $nTime = $intTime + ($e * $number); } else { $nTime = $intTime - ($e * $number); } return date( "Y-m-d H:i:s",$nTime); } ?>

Usage:

The DateAdd function can be used to add or subtract a numeric value from a date. Below is an example of how to add 7 days. <?php // Add 7 days to May 19th $date = "2007-05-19 13:51:22"; $action = "+"; $units_to_add = 7; $datepart = "d"; // 'd' For Days echo DateAdd($datepart,$action,$units_to_add,$date); ?> The output will be: 2007-05-26 13:51:22 Below is an example of how to subtract 7 days. <?php // Subtract 7 days from May 19th $date = "2007-05-19 13:51:22"; $action = "-"; $units_to_add = 7; $datepart = "d"; // 'd' For Days echo DateAdd($datepart,$action,$units_to_add,$date); ?> The output will be: 2007-05-12 13:51:22