Category Archives: PHP

Javascript validation:multiple select box-drop down box validation

<html>
<head>
<title>VALIDATION JAVASCRIPT:Select box validation using javascript</title>
<script type="text/javascript">

function validate()
{
var countries=document.getElementById("country");
var countries_count=countries.options.length;
if(countries_count==5)
{
alert("You entered five countries");
return false;
}

}
</script>
	</head>
<body>
<form method="post" id="form1" name="form1">
 <div>
	<table>
	
	    <tr>
			<td >
		  	<span>List of Countries</span><br>
			</td>
		</tr>
		<tr>
			<td>
			<select multiple size="25" name="country" id="country" style="width:250px;";>
							
							<option value="India">India</option>
							<option value="pakisthan">Pakisthan</option>
							<option value="sreelanka">Sreelanka</option>
							<option value="japan">Japan</option>
							<option value="usa">USA</option>
						</select>
			</td>
		</tr>
   </table>
</div>





<table> 
	<tr>
		<td>
		<input  accesskey="l" onclick="return validate();" value="Submit" name="mysubmit" id="mysubmit" type="submit">
		</td>
	</tr>
</table>
</form>
</body>
</html>

<html>

<head>

<title>VALIDATION JAVASCRIPT:Select box validation using javascript</title>

function validate()

{

var countries=document.getElementById("country");

var countries_count=countries.options.length;

if(countries_count==5)

{

alert("You entered five countries");

return false;

}

</script>

</head>

<body>

<div>

<table>

<tr>

<td >

<span>List of Countries</span><br>

</td>

</tr>

<tr>

<td>

<option value="India">India</option>

<option value="pakisthan">Pakisthan</option>

<option value="sreelanka">Sreelanka</option>

<option value="japan">Japan</option>

</select>

</td>

</tr>

</table>

</div>

<table>

<tr>

<td>

</td>

</tr>

</table>

</form>

</body>

</html>

Compare a date greater than or less than using php

$from='2014/12/15';
 $to='2014/12/03';

if(strtotime($from)>strtotime($to))
{
echo "From date cannot be greater than To date";
}

$from='2014/12/15';

$to='2014/12/03';

if(strtotime($from)>strtotime($to))

{

echo "From date cannot be greater than To date";

}

Validation of time using php regex:validation of hh:mm using regex

$time='12.9';
 
 if (!preg_match("/^(([0-1][0-9])|(2[0-3])):[0-5][0-9]$/", $name))
   echo "enter valid time";

$time='12.9';

if (!preg_match("/^(([0-1][0-9])|(2[0-3])):[0-5][0-9]$/", $name))

echo "enter valid time";

Validation of characters using php

$name='vasanthan';
 
 if (!preg_match("/^[A-Za-z]+$/", $name))
   echo "enter valid name";

$name='vasanthan';

if (!preg_match("/^[A-Za-z]+$/", $name))

echo "enter valid name";

Validation of digit using php:validating alphanumeric using php regex

$hours=43; 
if (!preg_match("/^[1-9]+$/", $hours))
   echo "enter valid hours";

$hours=43;

if (!preg_match("/^[1-9]+$/", $hours))

echo "enter valid hours";

Displaying startdate enddate of Week

   $start_date = date('Y-m-d',strtotime('+0 days'));
   $end_date = date('Y-m-d',strtotime('+7 days'));								
   $date_range['start'] = $start_date;
   $date_range['end'] = $end_date;
   $end_date = date('Y-m-d', strtotime('-1 day', strtotime($date_range['start'])));
   $start_date = date('Y-m-01',  strtotime($end_date));
   echo "<pre>";
   print_r($date_range);			

   //output
   //Array
   //(
   // [start] => 2014-12-05
   // [end] => 2014-12-12
   //)

$start_date = date('Y-m-d',strtotime('+0 days'));

$end_date = date('Y-m-d',strtotime('+7 days'));

$date_range['start'] = $start_date;

$date_range['end'] = $end_date;

$end_date = date('Y-m-d', strtotime('-1 day', strtotime($date_range['start'])));

$start_date = date('Y-m-01', strtotime($end_date));

echo "<pre>";

print_r($date_range);

//output

//Array

//(

// [start] => 2014-12-05

// [end] => 2014-12-12

//)

Displaying the start date and enddate of nextmonth using php

   $start_date = date('Y-m-01',strtotime('+1 months'));
   $end_date = date('Y-m-t',strtotime('+1 months'));							   
   $date_range['start'] =  $start_date;
   $date_range['end'] = $end_date;
   $end_date = date('Y-m-d', strtotime('-1 day', strtotime($date_range['start'])));
   $start_date = date('Y-m-01',  strtotime($end_date));
   echo "<pre>";
   print_r($date_range);		

  //output
  //Array
  //(
  //[start] => 2015-01-01
  //[end] => 2015-01-31
  //)

$start_date = date('Y-m-01',strtotime('+1 months'));

$end_date = date('Y-m-t',strtotime('+1 months'));

$date_range['start'] = $start_date;

$date_range['end'] = $end_date;

$end_date = date('Y-m-d', strtotime('-1 day', strtotime($date_range['start'])));

$start_date = date('Y-m-01', strtotime($end_date));

echo "<pre>";

print_r($date_range);

//output

//Array

//(

//[start] => 2015-01-01

//[end] => 2015-01-31

//)

Displaying startdate and endate of a month using php

  $start_date = date('Y-m-01');
  $end_date = date('Y-m-t');

  $date_range['start'] = $start_date;
  $date_range['end'] = $end_date;
  $end_date = date('Y-m-d', strtotime('-1 day', strtotime($date_range['start'])));
  $start_date = date('Y-m-01',  strtotime($end_date));
  echo "<pre>";
  print_r($date_range);	
  
  // output
  //Array
  //(
  //[start] => 2014-12-01
  //[end] => 2014-12-31
  //)

$start_date = date('Y-m-01');

$end_date = date('Y-m-t');

$date_range['start'] = $start_date;

$date_range['end'] = $end_date;

$end_date = date('Y-m-d', strtotime('-1 day', strtotime($date_range['start'])));

$start_date = date('Y-m-01', strtotime($end_date));

echo "<pre>";

print_r($date_range);

// output

//Array

//(

//[start] => 2014-12-01

//[end] => 2014-12-31

//)

Validation of firstname using regex in php

<?php
$name='vasanthan';
$regex_name = '/^[a-zA-Z ]*$/';

				if ($name!='' and !preg_match($regex_name,$name))
					{
						
						 echo "invalid";
					}

?>

<?php

$name='vasanthan';

$regex_name = '/^[a-zA-Z ]*$/';

if ($name!='' and !preg_match($regex_name,$name))

{

echo "invalid";

}

Find out duplicate entry from a form fields-Validation of duplicate entry in a form

<?php

				 $name                                     = 'vasanthan';
                 $email                                    = '';
				 $name_2                                   = '';
                 $email_2                                  = 'mydoubts.in@gmail.com';
				 $name_3                                   = '';
                 $email_3                                  = '';
				 $name_4                                   = 'vasanthan';
                 $email_4                                  = 'mydoubts.in@gmail.com';
				 
				 $name_array=array();
				 $email_array=array();
				 if($name!='')
						  {
						  $name_array[]=$name;
						  }
					if($name_2!='')
						  {
						  $name_array[]=$name_2;
						  }	  
					if($name_3!='')
						  {
						  $name_array[]=$name_3;
						  }	  
					if($name_4!='')
						  {
						  $name_array[]=$name_4;
						  }	  						  
 
 
					if($email!='')
						  {
						  $email_array[]=$email;
						  }
					if($email_2!='')
						  {
						  $email_array[]=$email_2;
						  }	  
					if($email_3!='')
						  {
						  $email_array[]=$email_3;
						  }	  
					if($email_4!='')
						  {
						  $email_array[]=$email_4;
						  }	  			
 
				 
				 echo "<pre>";
print_r($name_array);

				 
				 echo "<pre>";
print_r($email_array);

if (count(array_unique($name_array)) < count($name_array))

{
 echo 'Duplicate entry found  Name';

}
echo "<pre>";
if (count(array_unique($email_array)) < count($email_array))

{
 echo 'Duplicate entry found Email id';

}

?>

<?php

$name = 'vasanthan';

$email = '';

$name_2 = '';

$email_2 = 'mydoubts.in@gmail.com';

$name_3 = '';

$email_3 = '';

$name_4 = 'vasanthan';

$email_4 = 'mydoubts.in@gmail.com';

$name_array=array();

$email_array=array();

if($name!='')

{

$name_array[]=$name;

}

if($name_2!='')

{

$name_array[]=$name_2;

}

if($name_3!='')

{

$name_array[]=$name_3;

}

if($name_4!='')

{

$name_array[]=$name_4;

}

if($email!='')

{

$email_array[]=$email;

}

if($email_2!='')

{

$email_array[]=$email_2;

}

if($email_3!='')

{

$email_array[]=$email_3;

}

if($email_4!='')

{

$email_array[]=$email_4;

}

echo "<pre>";

print_r($name_array);

echo "<pre>";

print_r($email_array);

if (count(array_unique($name_array)) < count($name_array))

{

echo 'Duplicate entry found Name';

}

echo "<pre>";

if (count(array_unique($email_array)) < count($email_array))

{

echo 'Duplicate entry found Email id';

}