cf7-custom-validation.php

<?php
/*
File: Contact Form 7 Custom Validation
Author: Tirumal
Website: http://www.code-tricks.com
Description: This file, when included in functions.php of WordPress theme extends the contact form 7 data validations.
Such as date, email, phone number, zip codes etc. You can also extend the validations just by providing new names and 
respective validaton rules either conditional or reg expressive.

Please note that this is not a plugin. You need to include this file in your theme's functions.php using PHP include()
function.

include("cf7-custom-validation.php");

More information on this post: http://code-tricks.com/contact-form-7-custom-validation-in-wordpress/
*/
//url regex
function get_valid_url( $url ) {
 
    $regex = "((https?|ftp)\:\/\/)?"; // Scheme
    $regex .= "([a-z0-9+!*(),;?&=\$_.-]+(\:[a-z0-9+!*(),;?&=\$_.-]+)?@)?"; // User and Pass
    $regex .= "([a-z0-9-.]*)\.([a-z]{2,3})"; // Host or IP
    $regex .= "(\:[0-9]{2,5})?"; // Port
    $regex .= "(\/([a-z0-9+\$_-]\.?)+)*\/?"; // Path
    $regex .= "(\?[a-z+&\$_.-][a-z0-9;:@&%=+\/\$_.-]*)?"; // GET Query
    $regex .= "(#[a-z_.-][a-z0-9+\$_.-]*)?"; // Anchor
 
    return preg_match("/^$regex$/", $url);
 
}


// CF7 Custom Validation Rules

function compare_date($date1, $date2) {
  $date1 = explode('/', $date1);
	$date2 = explode('/', $date2);
	
	$output = false;
	
	if($date2[2] > $date1[2]) {
		$output = true;
	} else {
		$output = false;
	}
	
	if($date2[2] == $date1[2]) {
		if($date2[0] > $date1[0]) {
			$output = true;
		} else {
			$output = false;
		}
		
		if($date2[0] == $date1[0]) {
			if($date2[1] >= $date1[1]) {
				$output = true;
			} else {
				$output = false;
			}
		}
	}


	if ($output) {
		return true;
	} else { 
		return false;
	}
	

}


function cf7_custom_form_validation($result,$tag) {
	$type = $tag['type'];
	$name = $tag['name'];
	
	
	if($type == 'text*' && $_POST[$name] == ''){
			$result['valid'] = false;
			$result['reason'][$name] = wpcf7_get_message( 'invalid_required' );
	}

//__________________________________________________________________________________________________
	//Comparision date

	$date1 = $_POST['date1'];
	$date2 = $_POST['date2'];
	
	//CheckInDate
	if($name == 'date1'){
		if(!compare_date($date1, $date2)) {
			$result['valid'] = false;
			$result['reason'][$name] = 'Logical Error: Check in date should be before check out date';
		}
	}
	
//__________________________________________________________________________________________________

	//CheckOutDate
	if($name == 'date2'){
		if(!compare_date($date1, $date2)) {
			$result['valid'] = false;
			$result['reason'][$name] = 'Logical Error: Check out date should be After check in date';
		}
	}
	
//__________________________________________________________________________________________________

	//url
	if($name == 'url') {
		$url = $_POST['url'];
		
		if($url != '') {
			if(get_valid_url($url)){
				$result['valid'] = true;
			} else {
				$result['valid'] = false;
				$result['reason'][$name] = 'Entered URL is invalid.';
			}
		}
	}
	
	

	
//__________________________________________________________________________________________________
	
	//emailAddress
	if($name == 'emailAddress') {
		$emailAddress = $_POST['emailAddress'];
		
		if($emailAddress != '') {
			if(substr($emailAddress, 0, 1) == '.' || !preg_match('/^([*+!.&#$¦\'\\%\/0-9a-z^_`{}=?~:-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,4})$/i', $emailAddress)) {	
					$result['valid'] = false;
					$result['reason'][$name] = 'Entered Email is Invalid.';
			}
		}
	}

//__________________________________________________________________________________________________
	
	//datemdy
	if($name == 'datemdy'){
		$datemdy = $_POST['datemdy'];
		
		if($datemdy != '') {
			if(!preg_match('/^([0-9]{2})\/([0-9]{2})\/([0-9]{4})$/', $datemdy)) {
				$result['valid'] = false;
				$result['reason'][$name] = 'Enter Date in MM/DD/YYYY Format';
			}
		}
	}
//__________________________________________________________________________________________________
	//US Zip code validation
	//USZipCode
	if($name == 'USZipCode') {
		$USZipCode = $_POST['USZipCode'];
		
		if($USZipCode != '') {
		//	if(!preg_match('/^([0-9]{5})(-[0-9]{4})?$/i', $USZipCode)) {
				if(!preg_match('/^\d{5}(-\d{4})?$/', $USZipCode)) {
				$result['valid'] = false;
				$result['reason'][$name] = 'Entered Zipcode is Invalid';
			}
		}
	}
	
	
//__________________________________________________________________________________________________
	// CANADA Zip code validation
	//CANZipCode
	if($name == 'CANZipCode') {
		$CANZipCode = $_POST['CANZipCode'];
		
		if($CANZipCode != '') {
				if(!preg_match('/^[ABCEGHJKLMNPRSTVXY]{1}\d{1}[A-Z]{1} *\d{1}[A-Z]{1}\d{1}$/', $CANZipCode)) {
				$result['valid'] = false;
				$result['reason'][$name] = 'Entered Zipcode is Invalid';
			}
		}
	}
	
//__________________________________________________________________________________________________
	// US and CANADA Zip code validation
	//USCANZipCode
	if($name == 'USCANZipCode') {
		$USCANZipCode = $_POST['USCANZipCode'];
		
		if($USCANZipCode != '') {
				if(!preg_match('/^[ABCEGHJKLMNPRSTVXY]{1}\d{1}[A-Z]{1} *\d{1}[A-Z]{1}\d{1}$/', $USCANZipCode)) {
						if(!preg_match('/^\d{5}(-\d{4})?$/', $USCANZipCode)) {
						$result['valid'] = false;
						$result['reason'][$name] = 'Entered Zipcode is Invalid';
					}
				}
		}
	}
	
	
//__________________________________________________________________________________________________
	// Indian Postal code validation
	//inPostalCode
	if($name == 'inPostalCode') {
		$inPostalCode = $_POST['inPostalCode'];
		
		if($inPostalCode != '') {
				if(!preg_match('/^[0-9]{6,6}$/', $inPostalCode)) {
						$result['valid'] = false;
						$result['reason'][$name] = 'Entered Pin code for India is Invalid';
				}
		}
	}
	
//__________________________________________________________________________________________________

//This section updated on 22nd March 2013
// It will accept character, character + numeric value
// It will not accept special characters

	//fullName
	$allNames = array('fullName', 'fullName1');
	foreach($allNames as $uniNames) {
		if($name == $uniNames) {
			$fullName = $_POST[$uniNames];

				if($fullName != '') {
					if(!preg_match('/^[A-Z0-9][a-zA-Z0-9 ]+$/i', $fullName)) {
						$result['valid'] = false;
						$result['reason'][$name] = 'Please Enter a Valid Name';
					}
					
					if(is_numeric($fullName)){
						$result['valid'] = false;
						$result['reason'][$name] = 'Please Enter a Valid Name';
					}
				}

		}
	}
//__________________________________________________________________________________________________		
		

	//acceptNum
	$acceptNumbers = array('acceptNumber', 'acceptNumber1', 'acceptNumber2', 'acceptNumber3', 'acceptNumber4', 'acceptNumber5', 'acceptNumber6');
	
	foreach($acceptNumbers as $acceptNumber){
		if($name == $acceptNumber) {
			$acceptNum = $_POST[$acceptNumber];
			
			if($acceptNum != '') {
				if(ctype_digit($acceptNum)) {
					$result['valid'] = true;
				} else {
					$result['valid'] = false;
					$result['reason'][$name] = 'Please Enter Only Numbers';
				}
			}
		}
	}
	
	
	//__________________________________________________________________________________________________

	//faxNumber
	$faxNumbers = array('faxNumber', 'faxNumber1', 'faxNumber2', 'faxNumber3', 'faxNumber4', 'faxNumber5', 'faxNumber6');
	foreach($faxNumbers as $faxNum) {
		if($name == $faxNum) {
			$faxNumber = $_POST[$faxNum];
			$contRegex = '/^(?:1(?:[. -])?)?(?:\((?=\d{3}\)))?([2-9]\d{2})(?:(?<=\(\d{3})\))? ?(?:(?<=\d{3})[.-])?([2-9]\d{2})[. -]?(\d{4})(?: (?i:ext)\.? ?(\d{1,5}))?$/';
			if ($faxNumber != '') {
				if(!preg_match($contRegex, $faxNumber) && strlen($faxNumber) > 10 && strlen($faxNumber) < 18) {
						$result['valid'] = false;
						$result['reason'][$name] = 'Entered Fax Number is Invalid';
				}
			}
		}
	}

//__________________________________________________________________________________________________

	//Agreement fields with the expected values. Ex. write ,,yes" to agree
	$agreement = array('agreement','agreement1','agreement2');
	$expectedValues = array('yes', 'Yes', 'YES');
	foreach ($agreement as $a => $aValue) {
		if($name == $aValue) {
			foreach ($expected_values as $i => $eValue) {
				if($eValue == $_POST[$name]) {
						$result['valid'] = true; break;
				} else {
					$result['valid'] = false;
					$result['reason'][$name] = 'You did not agree with the terms';
				}
			}
		}
	 }

//__________________________________________________________________________________________________


	//Only Characters	
	$OnlyChars = array('onlyChar', 'onlyChar1', 'onlyChar2');
	foreach($OnlyChars as $OnlyChar){
		if($name == $OnlyChar) {
			$onlyChar = $_POST[$OnlyChar];

			if($onlyChar != '') {
				$containsLettersOrNumbers = (preg_match('~[0-9a-z]~i', $onlyChar) > 0);
				if(!$containsLettersOrNumbers
					|| is_numeric($onlyChar)
					|| strlen($onlyChar > 64) ) {
						$result['valid'] = false;
						$result['reason'][$name] = 'Please Enter Only Characters';
				}
	
		  		if(is_numeric($onlyChar)){
			  			$result['valid'] = false;
			  			$result['reason'][$name] = 'Please Enter Only Characters';
		  		}
			}

		}
	}


//__________________________________________________________________________________________________

	//validPhone
	/*
	49-4312 / 777 777
	+1 (305) 613-0958 x101
	(305) 613 09 58 ext 101
	3056130958
	+33 1 47 37 62 24 extension 3
	(016977) 1234
	04312 - 777 777
	91-12345-12345
	+58 295416 7216
	*/
	
	$phoneNumbersAll = array('validPhone', 'validPhone1', 'validPhone2', 'validPhone3', 'validPhone4', 'validPhone5', 'validPhone6');
	
	foreach($phoneNumbersAll as $validPhoneVal) {
		if($name == $validPhoneVal) {
			$validPhone = $_POST[$validPhoneVal];
			
			if($validPhone != '') {
				if(preg_match('/^(?:1(?:[. -])?)?(?:\((?=\d{3}\)))?([2-9]\d{2})(?:(?<=\(\d{3})\))? ?(?:(?<=\d{3})[.-])?([2-9]\d{2})[. -]?(\d{4})(?: (?i:ext)\.? ?(\d{1,5}))?$/', $validPhone) 
				
				|| preg_match('/^([\+][0-9]{1,3}[\ \.\-])?([\(]{1}[0-9]{2,6}[\)])?([0-9\ \.\-\/]{3,20})((x|ext|extension)[\ ]?[0-9]{1,4})?$/', $validPhone) 
				
				&& strlen($validPhone) > 9 
				
				&& strlen($validPhone) < 30 
				
				&& (int)($validPhone)) {
					//$result['valid'] = true;
				} else {
					$result['valid'] = false;
					$result['reason'][$name] = 'Entered Phone Number is Invalid';
				}
			}
		}
	}

//__________________________________________________________________________________________________
	return $result;
}

//add filter for text field validation
add_filter('wpcf7_validate_text','cf7_custom_form_validation', 10, 2); // text field
add_filter('wpcf7_validate_text*', 'cf7_custom_form_validation', 10, 2); // Req. text field


/*
TEXTAREA VALIDATIONS
*/

function cf7_custom_textarea_validation($result, $tag) {
	$type = $tag['type'];
	$name = $tag['name'];
	
	//if empty give required field error
	if($type == 'textarea*' && $_POST[$name] == ''){
			$result['valid'] = false;
			$result['reason'][$name] = wpcf7_get_message( 'invalid_required' );
	}
	
	//validations begins
//__________________________________________________________________________________________________
// Address text area validation	

	if($name == 'addressTa'){
		$addressTa = $_POST['addressTa'];
		
		if($addressTa != '') {
			if(strlen($addressTa) > 300) {
				$result['valid'] = false;
				$result['reason'][$name] = 'You should not exceed 300 characters length';
			}
		}
	}
	
	return $result;
	
}

//add fiter for text area validation
add_filter( 'wpcf7_validate_textarea', 'cf7_custom_textarea_validation', 10, 2 );
add_filter( 'wpcf7_validate_textarea*', 'cf7_custom_textarea_validation', 10, 2 );

?>