Decimal validation using codeigniter form validation class | DSCRIPTS

Decimal validation using codeigniter form validation class | DSCRIPTS: "class MY_Form_validation extends CI_Form_validation {
 
    function decimal($value)
    {
        $CI =& get_instance();
        $CI->form_validation->set_message('decimal',
            'The %s is not a valid decimal number.');
 
        $regx = '/^[-+]?[0-9]*\.?[0-9]*$/';
        if(preg_match($regx, $value))
            return true;
        return false;
    }
}"

JavaScript: Avoid ajax if not necessary and store small data locally in the page itself

Avoid ajax if not necessary and store small data locally in the page itself.
Example Case:We have to custom messages or descriptions on selecting an option of dropdown.
We can use some attribute like title inside the option tag of select/ Dropdown list to store some custom values/ descriptions and can be used to display the message or text without AJAX.


Here i used the following code for storing the currency of each country in the title field of the corresponding option and will be displayed when the country is selected.
HTML CODE


<table width="100%" class="noBorder" cellpadding="0" cellspacing="0">
      <tr>
        <td>
<select name="hostCountry" onchange="showhostcurrency(this);">
            <option value="">COUNTRY</option>
            <option title="Rupees" value="1">INDIA</option>
            <option title="USD" value="1">USA</option> 
</select>
        </td>
        <td class="showCurrency">
        </td>
</tr>
</table>

COUNTRY INDIA USA

function showhostcurrency(obj){
//Here the object will be passed to function which will be recieved to variable obj
//Value stored in title can be accessed as follows
     var currency=$(obj).find("option:selected").attr('title');
     if(currency!=''){
         var currency='Currency: '+currency;
     }
     $(obj).parent().parent().find('td.showCurrency').html(currency);
}

Custom Functions

I have been using PHP, Javascript, Jquery with codeignitor for the past 2 years. I used to use and make many custom functions for my productions purpose of which some are noteworthy and may be useful for others also.
I would like to share and discuss such custom functions with all PHP developers and freshers