Validate Dutch Phone Number

validate-dutch-phone-number-function.php

<?php
/**
 * Validate Dutch Phone number
 *
 * Can be a local or mobile phone number.
 */
function validate_dutch_phone_number( $phone_number ){
    if ( preg_match( "/^(\+|00|0)(31\s?)?(6[\s-]?[1-9][0-9]{7}|[1-9][0-9][\s-]?[1-9][0-9]{6}|[1-9][0-9]{2}[\s-]?[1-9][0-9]{5})$/", $phone_number ) ) {
        return true;
    } else {
        return false;
    }
}

// Example of valid number
if( validate_dutch_phone_number( '0612345678' ) ) {
    echo 'Your number is <strong>valid</strong>.';
} else {
    echo 'Your number is <strong>invalid</strong>.';
}

// Example of invalid number
if( validate_dutch_phone_number( '0001' ) ) {
    echo 'Your number is <strong>valid</strong>.';
} else {
    echo 'Your number is <strong>invalid</strong>.';
}