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141 lines
4.4 KiB
PHP
141 lines
4.4 KiB
PHP
<?php
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/**
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* class that provides methods to convert human readable time / interval length
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* expressions into other formats
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*
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* @author markus
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* $Id: HumanReadableTime.php 92 2010-03-10 11:43:15Z markus $
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*/
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require_once(LIBRARY_PATH . '/date/exception.HumanReadableTimeException.php');
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class HumanReadableTime {
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/**
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* normalize an HRT string, convert from HRT to seconds and then convert back to
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* HRT
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* @param string $hrt
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* @param string $maxunit
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* @return string
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*/
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public static function NormalizeHRT($hrt, $maxunit = 'w') {
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return self::Seconds2HR(self::HR2Seconds($hrt), $maxunit);
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}
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/**
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* convert string / interger which contains an interval length to
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* human readable format (1w2d7h)
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*
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* if $maxunit is set, it defines the biggest unit in output (i.e. $maxunit = 'h' will
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* allow only hms)
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*
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* @param string|integer $seconds
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* @param string $maxunit
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* @return string
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*/
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public static function Seconds2HR($seconds, $maxunit = 'w') {
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$maxunit = trim(strtolower($maxunit));
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$allowed = array('w' => 0, 'd' => 0, 'h' => 0, 'm' => 0, 's' => 0);
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if (!in_array($maxunit, array_keys($allowed), true))
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throw new HumanReadableTimeException('illegal value for maxunit: "' . $maxunit . '"');
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foreach ($allowed as $key => $value) {
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if ($maxunit == $key)
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break;
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unset($allowed[$key]);
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}
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$seconds = intval($seconds);
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$hrt = '';
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foreach ($allowed as $key => $value) {
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switch ($key) {
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case 'w':
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$tmp = intval($seconds / (7*86400));
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if ($tmp > 0)
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$seconds %= (7*86400);
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$allowed[$key] += $tmp;
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break;
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case 'd':
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$tmp = intval($seconds / (86400));
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if ($tmp > 0)
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$seconds %= (86400);
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$allowed[$key] += $tmp;
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break;
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case 'h':
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$tmp = intval($seconds / (3600));
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if ($tmp > 0)
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$seconds %= (3600);
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$allowed[$key] += $tmp;
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break;
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case 'm':
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$tmp = intval($seconds / (60));
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if ($tmp > 0)
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$seconds %= (60);
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$allowed[$key] += $tmp;
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break;
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case 's':
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$allowed[$key] += $seconds;
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break;
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}
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}
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$hrt = '';
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foreach ($allowed as $key => $value) {
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if ($value > 0)
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$hrt .= sprintf('%d%s', $value, $key);
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}
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return $hrt;
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}
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/**
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* parse a string of 3h2m7s and return the number of seconds as integer
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* add "s" to the end of the number if $addsecond is set to true
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* @param string $hr
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* @param boolean $addsecond
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* @return integer|string
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*/
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public static function HR2Seconds($hr, $addsecond = false) {
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$hr = trim($hr);
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if ($hr == '') {
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if ($addsecond === true)
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return '0s';
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else
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return 0;
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}
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$hr = strtolower($hr);
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$matches = array();
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if (preg_match_all('/([0-9]*)([wdhms])/', $hr, $matches, PREG_SET_ORDER) > 0) {
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$interval = 0;
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for ($i = 0; $i < count($matches); $i++) {
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switch ($matches[$i][2]) {
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case 'w':
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$interval += $matches[$i][1] * 7 * 86400;
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break;
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case 'd':
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$interval += $matches[$i][1] * 86400;
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break;
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case 'h':
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$interval += $matches[$i][1] * 3600;
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break;
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case 'm':
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$interval += $matches[$i][1] * 60;
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break;
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case 's':
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$interval += $matches[$i][1];
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break;
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}
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}
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if ($addsecond === true)
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return sprintf('%ds', $interval);
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else
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return $interval;
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}
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if ($addsecond === true)
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return '0s';
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else
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return 0;
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}
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}
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