PHP filter_var_array() example

filter_var_array.php

<?php

namespace WCM;

# USES PHP 5.3 + Closures

// No white surrounding space
$data = array_map( 'trim', $_POST['foo'] );

$data = filter_var_array( $data, array(
	'alpha_plus_period_plus_dash'      => array(
		'filter'  => FILTER_CALLBACK,
		'options' => function( $title ) {
			return preg_replace( '/[^a-zA-Z.-]/', "", $title );
		},
	),
	'boolean' => FILTER_VALIDATE_BOOLEAN,
	'name_first' => array(
		'filter'  => FILTER_CALLBACK,
		'options' => array(
			$this, 'sanitizeString'
		),
	),
	'name_last'  => array(
		'filter'  => FILTER_CALLBACK,
		'options' => array(
			$this, 'sanitizeString'
		),
	),
	// Phone Number of format: 1st char = digit (digit: 0-9)(dash)(digit: 0-9)
	'phone'      => array(
		'filter'  => FILTER_CALLBACK,
		'options' => function( $nr ) {
			return preg_replace( '/[^\d0-9]-[\d0-9]/i', "", $nr );
		},
	),
	'email'      => FILTER_SANITIZE_EMAIL,
) );
// Don't save empty values
$data = array_filter( $data );

/**
 * Callback to sanitize a string of the format (a-z)(possible dash)(a-z)
 * @param string $string
 * @return string Sanitized string
 */
function sanitizeString( $string )
{
	return preg_replace( '/[^a-z]-[a-z]/i', "", $string );
}