47 lines
1.3 KiB
PHP
47 lines
1.3 KiB
PHP
<?php
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/**
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* \file
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* \brief Utilities for the OAI Data Provider
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*
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* A collection of functions used.
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*/
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/** Validates an identifier. The pattern is: '/^[-a-z\.0-9]+$/i' which means
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* it accepts -, letters and numbers.
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* Used only by function <B>oai_error</B> code idDoesNotExist.
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* \param $url Type: string
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*/
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function is_valid_uri($url) {
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return((bool)preg_match('/^[-a-z\.0-9]+$/i', $url));
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}
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/** Validates attributes come with the query.
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* It accepts letters, numbers, ':', '_', '.' and -.
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* Here there are few more match patterns than is_valid_uri(): ':_'.
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* \param $attrb Type: string
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*/
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function is_valid_attrb($attrb) {
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return preg_match("/^[_a-zA-Z0-9\-\:\.]+$/",$attrb);
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}
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/** All datestamps used in this system are GMT even
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* return value from database has no TZ information
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*/
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function formatDatestamp($datestamp) {
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return date("Y-m-d\TH:i:s\Z",strtotime($datestamp));
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}
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/** The database uses datastamp without time-zone information.
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* It needs to clean all time-zone informaion from time string and reformat it
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*/
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function checkDateFormat($date) {
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$date = str_replace(array("T","Z")," ",$date);
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$time_val = strtotime($date);
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if(!$time_val) return false;
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if(strstr($date,":")) {
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return date("Y-m-d H:i:s",$time_val);
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} else {
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return date("Y-m-d",$time_val);
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}
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}
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