<?php
abstract class Filter
{
abstract public static function check($value, array $options = array());
}
final class IntFilter
{
public static function check($value, array $options = array())
{
return $value;
}
}
final class StringFilter
{
public static function check($value, array $options = array())
{
if (false === is_string($value)) {
return false;
}
if (false !== ($options['trim'] ?? true)) {
$value = trim($value);
}
$length = mb_strlen($value, '8bit');
if ((false === ($options['empty'] ?? true)) && (0 === $length)) {
return false;
}
if (isset($options['max'])) {
$maxLength = IntFilter::check($options['max'], ['min' => 1]);
if ($length > $maxLength) {
return false;
}
}
if (isset($options['min'])) {
$minLength = IntFilter::check($options['min'], ['min' => 1]);
if ($length < $minLength) {
return false;
}
}
foreach (['startsWith', 'endsWith'] as $name) {
if (isset($options[$name])) {
$needle = StringFilter::check($options[$name]);
if (false === self::$name($value, $needle)) {
return false;
}
}
}
return $value;
}
private static function startsWith($haystack, $needle)
{
return $haystack[0] === $needle[0] ? strncmp($haystack, $needle, mb_strlen($needle, '8bit')) === 0 : false;
}
private static function endsWith($haystack, $needle)
{
$length = mb_strlen($needle, '8bit');
$haystack = mb_substr($haystack, -$length);
return $haystack[0] === $needle[0] ? strncmp($haystack, $needle, $length) === 0 : false;
}
}
var_dump(StringFilter::check(' r a ', ['startsWith' => 'r']));
var_dump(StringFilter::check(' r a ', ['startsWith' => 'z']));
var_dump(StringFilter::check(' r a ', ['endsWith' => 'a']));
var_dump(StringFilter::check(' r a ', ['endsWith' => 'z']));
var_dump(StringFilter::check(' r a ', ['startsWith' => 'r', 'endsWith' => 'a']));
var_dump(StringFilter::check(' r a ', ['startsWith' => 'r', 'endsWith' => 'z']));
var_dump(StringFilter::check(' r a ', ['startsWith' => 'z', 'endsWith' => 'a']));
var_dump(StringFilter::check(' r a ', ['startsWith' => 'z', 'endsWith' => 'y']));
- Output for git.master, git.master_jit, rfc.property-hooks
- string(4) "r a"
bool(false)
string(4) "r a"
bool(false)
string(4) "r a"
bool(false)
bool(false)
bool(false)
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