137 lines
3.2 KiB
PHP
137 lines
3.2 KiB
PHP
<?php
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/**
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* Leitet den Browser an die übergebene URL weiter und hält das Script an.
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*/
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function redirect($to) {
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header("Location: " . $to, true, 302);
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raw_output("");
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}
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/**
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* Echoes given output and dies.
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*
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* @param String $output
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*/
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function raw_output($output) {
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echo $output;
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die();
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}
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/**
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* Checks if given request item (name) can be parsed to a date.
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* If not parsable, given error message is put into msg() and null is returned.
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*
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* @param string $input
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* String to be parsed into a date.
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* @param string $error_message
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* the error message displayed if $input is not parsable
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* @param boolean $null_allowed
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* is a null value allowed?
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* @return ValidationResult containing the parsed date
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*/
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function check_request_date($name, $error_message = null, $null_allowed = false) {
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if (! isset($_REQUEST[$name])) {
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return new ValidationResult($null_allowed, null);
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}
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return check_date($_REQUEST[$name], $error_message, $null_allowed);
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}
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/**
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* Checks if given string can be parsed to a date.
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* If not parsable, given error message is put into msg() and null is returned.
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*
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* @param string $input
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* String to be parsed into a date.
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* @param string $error_message
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* the error message displayed if $input is not parsable
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* @param boolean $null_allowed
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* is a null value allowed?
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* @return ValidationResult containing the parsed date
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*/
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function check_date($input, $error_message = null, $null_allowed = false) {
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if (DateTime::createFromFormat("Y-m-d", trim($input))) {
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return new ValidationResult(true, DateTime::createFromFormat("Y-m-d", trim($input))->getTimestamp());
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}
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if ($null_allowed) {
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return new ValidationResult(true, null);
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}
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error($error_message);
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return new ValidationResult(false, null);
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}
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/**
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* Gibt den gefilterten REQUEST Wert ohne Zeilenumbrüche zurück
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*/
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function strip_request_item($name) {
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return strip_item($_REQUEST[$name]);
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}
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/**
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* Testet, ob der angegebene REQUEST Wert ein Integer ist, bzw.
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* eine ID sein könnte.
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*/
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function test_request_int($name) {
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if (isset($_REQUEST[$name])) {
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return preg_match("/^[0-9]*$/", $_REQUEST[$name]);
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}
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return false;
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}
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/**
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* Gibt den gefilterten REQUEST Wert mit Zeilenumbrüchen zurück
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*/
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function strip_request_item_nl($name) {
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return preg_replace("/([^\p{L}\p{S}\p{P}\p{Z}\p{N}+\n]{1,})/ui", '', strip_tags($_REQUEST[$name]));
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}
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/**
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* Entfernt unerwünschte Zeichen
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*/
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function strip_item($item) {
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return preg_replace("/([^\p{L}\p{S}\p{P}\p{Z}\p{N}+]{1,})/ui", '', strip_tags($item));
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}
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/**
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* Überprüft eine E-Mail-Adresse.
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*/
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function check_email($email) {
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return (bool) filter_var($email, FILTER_VALIDATE_EMAIL);
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}
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class ValidationResult {
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private $valid;
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private $value;
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/**
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* Constructor.
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*
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* @param boolean $valid
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* Is the value valid?
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* @param * $value
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* The validated value
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*/
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public function ValidationResult($valid, $value) {
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$this->ok = $valid;
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$this->value = $value;
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}
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/**
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* Is the value valid?
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*/
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public function isValid() {
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return $this->valid;
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}
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/**
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* The parsed/validated value.
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*/
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public function getValue() {
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return $this->value;
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}
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}
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?>
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