269 function enano_date($string, $timestamp = false) |
269 function enano_date($string, $timestamp = false) |
270 { |
270 { |
271 if ( !is_int($timestamp) && !is_double($timestamp) && strval(intval($timestamp)) !== $timestamp ) |
271 if ( !is_int($timestamp) && !is_double($timestamp) && strval(intval($timestamp)) !== $timestamp ) |
272 $timestamp = time(); |
272 $timestamp = time(); |
273 |
273 |
274 /* |
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275 // List of valid characters for date() |
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276 $date_chars = 'dDjlNSwzWFmMntLoYyaABgGhHisueIOPTZFcrU'; |
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277 // Split them into an array |
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278 $date_chars = enano_str_split($date_chars); |
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279 // Emulate date() formatting by replacing date characters with their |
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280 // percentage-signed counterparts, but not escaped characters which |
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281 // shouldn't be parsed. |
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282 foreach ( $date_chars as $char ) |
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283 { |
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284 $string = str_replace($char, "%$char", $string); |
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285 $string = str_replace("\\%$char", $char, $string); |
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286 } |
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287 */ |
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288 |
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289 // perform timestamp offset |
274 // perform timestamp offset |
290 global $timezone; |
275 global $timezone; |
291 // it's gonna be in minutes, so multiply by 60 to offset the unix timestamp |
276 // it's gonna be in minutes, so multiply by 60 to offset the unix timestamp |
292 $timestamp = $timestamp + ( $timezone * 60 ); |
277 $timestamp = $timestamp + ( $timezone * 60 ); |
293 |
278 |
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279 // are we in DST? |
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280 global $dst_params; |
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281 if ( check_timestamp_dst($timestamp, $dst_params[0], $dst_params[1], $dst_params[2], $dst_params[3]) ) |
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282 { |
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283 // offset for DST |
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284 $timestamp += ( $dst_params[4] * 60 ); |
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285 } |
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286 |
294 // Let PHP do the work for us =) |
287 // Let PHP do the work for us =) |
295 return gmdate($string, $timestamp); |
288 return gmdate($string, $timestamp); |
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289 } |
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290 |
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291 /** |
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292 * Determine if a timestamp is within DST. |
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293 * @param int Timestamp |
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294 * @param int Start month (1-12) of DST |
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295 * @param int Which Sunday DST starts on (*_SUNDAY constants) |
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296 * @param int End month of DST |
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297 * @param int Which Sunday DST ends on |
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298 * @return bool |
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299 */ |
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300 |
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301 function check_timestamp_dst($time, $start_month, $start_sunday, $end_month, $end_sunday) |
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302 { |
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303 static $sundays = array(FIRST_SUNDAY, SECOND_SUNDAY, THIRD_SUNDAY, LAST_SUNDAY); |
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304 |
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305 // perform timestamp offset |
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306 global $timezone; |
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307 // it's gonna be in minutes, so multiply by 60 to offset the unix timestamp |
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308 $time = $time + ( $timezone * 60 ); |
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309 $year = intval(gmdate('Y', $time)); |
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310 |
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311 // one-pass validation |
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312 if ( !in_array($start_sunday, $sundays) || !in_array($end_sunday, $sundays) || |
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313 $start_month < 1 || $start_month > 12 || $end_month < 1 || $end_month > 12 ) |
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314 return false; |
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315 |
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316 // get timestamp of the selected sunday (start) |
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317 $dst_start = get_sunday_timestamp($start_month, $start_sunday, $year); |
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318 $dst_end = get_sunday_timestamp($end_month, $end_sunday, $year); |
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319 |
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320 if ( $dst_start > $dst_end ) |
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321 { |
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322 // start time is past the end time, this means we're in the southern hemisphere |
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323 // as a result, if we're within the range, DST is NOT in progress. |
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324 return !( $time >= $dst_start && $time <= $dst_end ); |
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325 } |
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326 |
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327 return $time >= $dst_start && $time <= $dst_end; |
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328 } |
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329 |
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330 /** |
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331 * Returns a timestamp for the given *_SUNDAY index. |
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332 * @param int Month |
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333 * @param int Which Sunday (FIRST, SECOND, THIRD, or LAST) |
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334 * @param int Year that we're doing our calculations in |
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335 * @return int |
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336 */ |
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337 |
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338 function get_sunday_timestamp($month, $sunday, $year) |
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339 { |
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340 $days_in_month = array( |
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341 1 => 31, |
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342 2 => $year % 4 == 0 && ( $year % 100 != 0 || ( $year % 100 == 0 && $year % 400 == 0 ) ) ? 29 : 28, |
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343 3 => 31, |
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344 4 => 30, |
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345 5 => 31, |
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346 6 => 30, |
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347 7 => 31, |
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348 8 => 31, |
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349 9 => 30, |
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350 10 => 31, |
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351 11 => 30, |
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352 12 => 31 |
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353 ); |
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354 |
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355 $result = mktime(0, 0, 0, $month, 1, $year); |
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356 |
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357 // hack. allows a specific day of the month to be set instead of a sunday. not a good place to do this. |
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358 if ( is_string($sunday) && substr($sunday, -1) === 'd' ) |
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359 { |
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360 $result += 86400 * ( intval($sunday) - 1); |
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361 return $result; |
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362 } |
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363 |
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364 $tick = 0; |
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365 $days_remaining = $days_in_month[$month]; |
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366 while ( true ) |
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367 { |
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368 if ( date('D', $result) == 'Sun' ) |
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369 { |
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370 $tick++; |
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371 if ( ( $tick == 1 && $sunday == FIRST_SUNDAY ) || |
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372 ( $tick == 2 && $sunday == SECOND_SUNDAY ) || |
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373 ( $tick == 3 && $sunday == THIRD_SUNDAY ) || |
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374 ( $sunday == LAST_SUNDAY && $days_remaining < 7 ) ) |
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375 break; |
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376 } |
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377 $days_remaining--; |
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378 $result += 86400; |
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379 } |
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380 |
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381 return $result; |
296 } |
382 } |
297 |
383 |
298 /** |
384 /** |
299 * Tells you the title for the given page ID string |
385 * Tells you the title for the given page ID string |
300 * @param string Page ID string (ex: Special:Administration) |
386 * @param string Page ID string (ex: Special:Administration) |