Date format validation in PHP

Validate a date in “YYYY-MM-DD” format.

function checkDateFormat($date)

{

    //match the format of the date

    if (preg_match ("/^([0-9]{4})-([0-9]{2})-([0-9]{2})$/", $date, $parts))

    {

        //check weather the date is valid of not

        if(checkdate($parts[2],$parts[3],$parts[1]))

            return true;

        else

        return false;

    }

    else

        return false;

}

Parsing XML in easy way using PHP

Required Extension: SimpleXML

//this is a sample xml string

$xml_string="<?xml version='1.0'?>

<moleculedb>

    <molecule name='Benzine'>

        <symbol>ben</symbol>

        <code>A</code>

    </molecule>

    <molecule name='Water'>

        <symbol>h2o</symbol>

        <code>K</code>

    </molecule>

</moleculedb>";

 

//load the xml string using simplexml function

$xml = simplexml_load_string($xml_string);

 

//loop through the each node of molecule

foreach ($xml->molecule as $record)

{

   //attribute are accessted by

   echo $record['name'], '  ';

   //node are accessted by -> operator

   echo $record->symbol, '  ';

   echo $record->code, '<br />';

}

Email validation snippet in PHP

$email = $_POST['email'];

if(preg_match("~([a-zA-Z0-9!#$%&'*+-/=?^_`{|}~])@([a-zA-Z0-9-]).([a-zA-Z0-9]{2,4})~",$email)) {

    echo 'This is a valid email.';

} else{

    echo 'This is an invalid email.';

}