81 lines
2.4 KiB
PHP
81 lines
2.4 KiB
PHP
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<?php
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/*
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* This file is part of Simple Validator.
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*
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* (c) Frédéric Guillot <contact@fredericguillot.com>
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*
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* This source file is subject to the MIT license that is bundled
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* with this source code in the file LICENSE.
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*/
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namespace SimpleValidator\Validators;
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use SimpleValidator\Base;
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/**
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* @author Frédéric Guillot <contact@fredericguillot.com>
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*/
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class Email extends Base
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{
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public function execute(array $data)
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{
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if (isset($data[$this->field]) && $data[$this->field] !== '') {
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// I use the same validation method as Firefox
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// http://hg.mozilla.org/mozilla-central/file/cf5da681d577/content/html/content/src/nsHTMLInputElement.cpp#l3967
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$value = $data[$this->field];
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$length = strlen($value);
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// If the email address begins with a '@' or ends with a '.',
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// we know it's invalid.
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if ($value[0] === '@' || $value[$length - 1] === '.') {
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return false;
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}
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// Check the username
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for ($i = 0; $i < $length && $value[$i] !== '@'; ++$i) {
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$c = $value[$i];
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if (! (ctype_alnum($c) || $c === '.' || $c === '!' || $c === '#' || $c === '$' ||
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$c === '%' || $c === '&' || $c === '\'' || $c === '*' || $c === '+' ||
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$c === '-' || $c === '/' || $c === '=' || $c === '?' || $c === '^' ||
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$c === '_' || $c === '`' || $c === '{' || $c === '|' || $c === '}' ||
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$c === '~')) {
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return false;
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}
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}
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// There is no domain name (or it's one-character long),
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// that's not a valid email address.
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if (++$i >= $length) return false;
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if (($i + 1) === $length) return false;
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// The domain name can't begin with a dot.
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if ($value[$i] === '.') return false;
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// Parsing the domain name.
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for (; $i < $length; ++$i) {
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$c = $value[$i];
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if ($c === '.') {
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// A dot can't follow a dot.
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if ($value[$i - 1] === '.') return false;
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}
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elseif (! (ctype_alnum($c) || $c === '-')) {
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// The domain characters have to be in this list to be valid.
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return false;
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}
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}
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}
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return true;
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}
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}
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