V podstate všetky slúžia na validáciu parametra $value podľa zadaného reg. výrazu okrem funkcie debugArray(), ktoré vypisuje obsah poľa.

	function email( $value ) {
		return( ereg( "^[^@ ]+@([a-zA-Z0-9-]+\.)+([a-zA-Z0-9-]{2,4})$", $value ) ) 
	}

	function zip( $value ) {
		return( ereg( "^[0-9]{5}$", str_replace( ' ', '', $value ) ) ) 
	}

	function ico( $value ) {
		return( ereg( "^[0-9]{8}$", str_replace( ' ', '', $value ) ) ) 
	}

	function icdph( $value ) {
		return( ereg( "^[A-Z]{2}[0-9]{10}$", str_replace( ' ', '', $value ) ) ) 
	}

	function password( $value ) {
		return( ereg( "^[a-z0-9]{5,20}$", $value ) ) 
	}

	function debugArray( $name = '', &$array ) {
		return ( '<pre><strong>'.$name.'</strong><br />'.print_r( $array, true ).'</pre>' );
	}

	/**
	 * Eval date, input format: dd.mm.yyyy
	 *
	 * @param	string 		$value: dd.mm.yyyy
	 * @return	bool 		return: evaluation result
	 */
	function evaldate( $value ) {
		$value = trim( $value );
		if( $value == '' ) return false;
		$date = explode( '.', $value );
		if( isset( $date[0] ) && isset( $date[1] ) && isset( $date[2] ) && $date[0] > 0 && $date[1] > 0 && $date[2] > 0 ) {
			if( checkdate( $date[1], $date[0], $date[2] ) )
				return true;
		}
		return false;
	}

/**
 * Check Czech/Slovak format of date DD. MM. RRRR don't required zeros and spacesbetween DD and MM
 *
 * @author	Vebloud
 * @url		www.manualy.net/article.php
 *
 * @param	string		$to_validate: date string
 * @return	bool		return: result true/false
 */ 
function isDate( $to_validate ) {

	$RegExp = "/^(\d{1,2})\. ?(\d{1,2})\. ?(\d{4})$/";
	return preg_match( $RegExp, $to_validate, $match ) && checkdate( $match[2], $match[1], $match[3] );
}

Výsledky kontroly dátumu

Input date: 30.9.2008
Result validation: OK

Input date: 28. 2. 2007
Result validation: OK

Input date: 30-9-2008
Result validation: Error

Input date: 30.2.2007
Result validation: Error

Zdroj: Jiří Kosek, PHP - Tvorba interaktivních internetových aplikací

$date = '2008-08-22'; // output format: 22.08.2008

if( ereg( "^([0-9]{4})-([0-9]{1,2})-([0-9]{1,2})$", $date, $arr ) )
    echo 'Prevod datumu z '.$date.' na '.$arr[3].'.'.$arr[2].'.'.$arr[1];
else
    echo 'Nesprávny formát dátumu: '.$date;

Nahradzuje vo vstupnom texte URL adresy živými odkazmi (tagmi anchor).

	/**
	 * Convert text with email and URL addres to text with anchors.
	 *
	 * 1. convert support@pogoda.in into <a href="mailto:support@pogoda.in">support@pogoda.in</a>
	 * 2. convert www.pogoda.in/new_york/eng/ into <a href="http://pogoda.in/new_york/eng/">pogoda.in/new_york/eng/</a>
	 * 3. convert www.pogoda.in/new_york/eng/ into <a href="http://www.pogoda.in/new_york/eng/">www.pogoda.in/new_york/eng/</a>
	 *
	 * @author	Vladimir Luchaninov, Robert Gonda
	 * @url		www.php.net/function.eregi-replace
	 *
	 * @param	string		$text: source string
	 * @return	string		return: parsed string
	 */ 
	function replaceLinks( $text ) {
	
		$text = ereg_replace('[-a-z0-9.!#$%&\'*+/=?^_`{|}~]+@([.]?[a-zA-Z0-9_/-])*', '<a href="mailto:\\0">\\0</a>',$text);
		$text = ereg_replace('[a-zA-Z]+://(([.]?[a-zA-Z0-9_/-?&])*)', '<a href="\\0">\\1</a>',$text);
		$text = ereg_replace('(^| )(www([-]*[.]?[a-zA-Z0-9_/-?&%])*)', ' <a href="http://\\2">\\2</a>',$text);
		return $text;
	}

Text mailu sa generuje zo šablóny.

class functions {

	// Site emails
	var $adminEmail = 'email@email.sk';
	var $fromEmail = 'email@email.sk';
	var $fromName = 'Sender name';
	var $toEmail = '';
	var $path = 'typo3conf/ext/rtgproject/cron/';
	var $mailTemplateNames;
	var $mailTemplates;
	
	// FE users page
	var $pidUsers = 96;
	var $pidUsersNonConfirmed = 231;
	var $confirmLink = 'http://www.sitename.sk/.../###UID###/index.html';
	
	function sendMail( $temp = '', $email = '', &$user = false, $type = 'user' ) {

		// Mail headers
		$subject = 'Upozornenie';
		$headers = array();
		$headers[] = "MIME-Version: 1.0";
		$headers[] = "Content-type: text/plain; charset=utf-8";
		$headers[] = "Content-Transfer-Encoding: quoted-printable";
		$headers[] = "FROM: ".$this->fromName." <".$this->fromEmail.">";

		// Create mail form template
		if( $temp != '' ) {

			$template = $this->mailTemplates[$temp];
			$patterns = array(
				0 => '/###FE_USERS_UID###/',
				'/###FE_USERS_TITLE###/',
				'/###FE_USERS_NAME###/',
				'/###FE_USERS_TX_RTGPROJECT_SURNAME###/',
				'/###FE_USERS_TX_RTGPROJECT_TITLE_POST###/',
				'/###FE_USERS_USERNAME###/',
				'/###FE_USERS_EMAIL###/',
				'/###FE_USERS_CRDATE###/',
				'/###CONFIRM_LINK###/',
			);

			$replacements = array(
				0 => $user['uid'],
				$user['title'],
				$user['name'],
				$user['tx_rtgproject_surname'],
				$user['tx_rtgproject_title_post'],
				$user['username'],
				$user['email'],
				$user['crdate'],
				str_replace ( '###UID###', $user['uid'], $this->confirmLink ),
			);
			$text = preg_replace( $patterns, $replacements, $template );
			
			return mail( $email, $subject, $text, implode( $headers, chr( 10 ) ) );
		}

		return false;
	}
}