344 lines
10 KiB
PHP
344 lines
10 KiB
PHP
<?php
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/**
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* @package SQLite Integration
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* @version 1.0
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* @author Kojima Toshiyasu, Justin Adie
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*
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*/
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/**
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* This class defines user defined functions(UDFs) for PDO
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* This replaces the functions used in the SQL statement with the PHP functions.
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* If you want another, add the name in the array and define the function with
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* PHP script.
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*/
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class PDOSQLiteUDFS {
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public function __construct(&$pdo){
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foreach ($this->functions as $f=>$t) {
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$pdo->sqliteCreateFunction($f, array($this, $t));
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}
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}
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private $functions = array(
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'month' => 'month',
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'year' => 'year',
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'day' => 'day',
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'unix_timestamp' => 'unix_timestamp',
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'now' => 'now',
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'char_length' => 'char_length',
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'md5' => 'md5',
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'curdate' => 'curdate',
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'rand' => 'rand',
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'substring' => 'substring',
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'dayofmonth' => 'day',
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'second' => 'second',
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'minute' => 'minute',
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'hour' => 'hour',
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'date_format' => 'dateformat',
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'from_unixtime' => 'from_unixtime',
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'date_add' => 'date_add',
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'date_sub' => 'date_sub',
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'adddate' => 'date_add',
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'subdate' => 'date_sub',
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'localtime' => 'now',
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'localtimestamp' => 'now',
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//'date'=>'date',
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'isnull' => 'isnull',
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'if' => '_if',
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'regexpp' => 'regexp',
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'concat' => 'concat',
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'field' => 'field',
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'log' => 'log',
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'least' => 'least',
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'replace' => 'replace',
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'get_lock' => 'get_lock',
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'release_lock' => 'release_lock',
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'ucase' => 'ucase',
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'lcase' => 'lcase',
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'inet_ntoa' => 'inet_ntoa',
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'inet_aton' => 'inet_aton',
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'datediff' => 'datediff'
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);
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public function month($field){
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$t = strtotime($field);
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return date('n', $t);
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}
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public function year($field){
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$t = strtotime($field);
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return date('Y', $t);
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}
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public function day($field){
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$t = strtotime($field);
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return date('j', $t);
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}
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public function unix_timestamp($field = null){
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return is_null($field) ? time() : strtotime($field);
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}
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public function second($field){
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$t = strtotime($field);
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return intval( date("s", $t) );
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}
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public function minute($field){
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$t = strtotime($field);
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return intval(date("i", $t));
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}
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public function hour($time){
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list($hours, $minutes, $seconds) = explode(":", $time);
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return intval($hours);
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}
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public function from_unixtime($field, $format=null){
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// $field is a timestamp
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//convert to ISO time
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$date = date("Y-m-d H:i:s", $field);
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//now submit to dateformat
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return is_null($format) ? $date : $self->dateformat($date, $format);
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}
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public function now(){
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return date("Y-m-d H:i:s");
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}
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public function curdate() {
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return date("Y-m-d");
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}
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public function char_length($field){
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return strlen($field);
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}
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public function md5($field){
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return md5($field);
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}
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public function rand(){
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return rand(0,1);
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}
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public function substring($text, $pos, $len=null){
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if (is_null($len)) return substr($text, $pos-1);
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else return substr($text, $pos-1, $len);
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}
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public function dateformat($date, $format){
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$mysql_php_dateformats = array ( '%a' => 'D', '%b' => 'M', '%c' => 'n', '%D' => 'jS', '%d' => 'd', '%e' => 'j', '%H' => 'H', '%h' => 'h', '%I' => 'h', '%i' => 'i', '%j' => 'z', '%k' => 'G', '%l' => 'g', '%M' => 'F', '%m' => 'm', '%p' => 'A', '%r' => 'h:i:s A', '%S' => 's', '%s' => 's', '%T' => 'H:i:s', '%U' => 'W', '%u' => 'W', '%V' => 'W', '%v' => 'W', '%W' => 'l', '%w' => 'w', '%X' => 'Y', '%x' => 'o', '%Y' => 'Y', '%y' => 'y', );
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$t = strtotime($date);
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$format = strtr($format, $mysql_php_dateformats);
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$output = date($format, $t);
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return $output;
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}
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public function date_add($date, $interval) {
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$interval = $this->deriveInterval($interval);
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switch (strtolower($date)) {
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case "curdate()":
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$objDate = new Datetime($this->curdate());
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$objDate->add(new DateInterval($interval));
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$returnval = $objDate->format("Y-m-d");
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break;
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case "now()":
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$objDate = new Datetime($this->now());
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$objDate->add(new DateInterval($interval));
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$returnval = $objDate->format("Y-m-d H:i:s");
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break;
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default:
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$objDate = new Datetime($date);
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$objDate->add(new DateInterval($interval));
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$returnval = $objDate->format("Y-m-d H:i:s");
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}
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return $returnval;
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}
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public function date_sub($date, $interval) {
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$interval = $this->deriveInterval($interval);
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switch (strtolower($date)) {
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case "curdate()":
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$objDate = new Datetime($this->curdate());
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$objDate->sub(new DateInterval($interval));
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$returnval = $objDate->format("Y-m-d");
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break;
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case "now()":
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$objDate = new Datetime($this->now());
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$objDate->sub(new DateInterval($interval));
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$returnval = $objDate->format("Y-m-d H:i:s");
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break;
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default:
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$objDate = new Datetime($date);
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$objDate->sub(new DateInterval($interval));
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$returnval = $objDate->format("Y-m-d H:i:s");
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}
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return $returnval;
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}
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private function deriveInterval($interval) {
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$interval = trim(substr(trim($interval), 8));
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$parts = explode(' ', $interval);
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foreach ($parts as $part) {
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if (!empty($part)) {
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$_parts[] = $part;
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}
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}
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$type = strtolower(end($_parts));
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switch ($type) {
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case "second": $unit = 'S'; return 'PT' . $_parts[0] . $unit; break;
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case "minute": $unit = 'M'; return 'PT' . $_parts[0] . $unit; break;
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case "hour": $unit = 'H'; return 'PT' . $_parts[0] . $unit; break;
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case "day": $unit = 'D'; return 'P' . $_parts[0] . $unit; break;
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case "week": $unit = 'W'; return 'P' . $_parts[0] . $unit; break;
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case "month": $unit = 'M'; return 'P' . $_parts[0] . $unit; break;
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case "year": $unit = 'Y'; return 'P' . $_parts[0] . $unit; break;
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case "minute_second":
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list($minutes, $seconds) = explode(':', $_parts[0]);
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return 'PT' . $minutes . 'M' . $seconds . 'S';
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break;
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case "hour_second":
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list($hours, $minutes, $seconds) = explode (':', $_parts[0]);
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return 'PT' . $hours . 'H' . $minutes . 'M' . $seconds . 'S';
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break;
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case "hour_minute":
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list($hours, $minutes) = explode (':', $_parts[0]);
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return 'PT' . $hours . 'H' . $minutes . 'M';
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break;
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case "day_second":
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$days = intval($_parts[0]);
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list($hours, $minutes, $seconds) = explode (':', $_parts[1]);
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return 'P' . $days . 'D' . 'T' . $hours . 'H' . $minutes . 'M' . $seconds . 'S';
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break;
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case "day_minute":
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$days = intval($_parts[0]);
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list($hours, $minutes) = explode(':', $parts[1]);
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return 'P' . $days . 'D' . 'T' . $hours . 'H' . $minutes . 'M';
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break;
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case "day_hour":
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$days = intval($_parts[0]);
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$hours = intval($_parts[1]);
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return 'P' . $days . 'D' . 'T' . $hours . 'H';
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break;
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case "year_month":
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list($years, $months) = explode ('-', $_parts[0]);
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return 'P' . $years . 'Y' . $months . 'M';
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break;
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}
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}
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public function date($date){
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return date("Y-m-d", strtotime($date));
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}
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public function isnull($field){
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return is_null($field);
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}
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public function _if($expression, $true, $false){
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return ($expression == true) ? $true : $false;
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}
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public function regexp($field, $pattern){
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$pattern = str_replace('/', '\/', $pattern);
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$pattern = "/" . $pattern ."/i";
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return preg_match ($pattern, $field);
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}
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public function concat() {
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$returnValue = "";
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$argsNum = func_num_args();
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$argsList = func_get_args();
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for ($i = 0; $i < $argsNum; $i++) {
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if (is_null($argsList[$i])) {
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return null;
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}
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$returnValue .= $argsList[$i];
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}
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return $returnValue;
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}
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public function field() {
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$numArgs = func_num_args();
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if ($numArgs < 2 or is_null(func_get_arg(0))) {
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return null;
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}
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$arr = func_get_args();
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$searchString = strtolower(array_shift($arr));
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for ($i = 0; $i < $numArgs-1; $i++) {
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if ($searchString === strtolower($arr[$i])) return $i + 1;
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}
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return null;
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}
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public function log() {
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$numArgs = func_num_args();
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if ($numArgs == 1) {
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$arg1 = func_get_arg(0);
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return log($arg1);
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} else if ($numArgs == 2) {
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$arg1 = func_get_arg(0);
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$arg2 = func_get_arg(1);
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return log($arg1)/log($arg2);
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} else {
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return false;
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}
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}
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public function least() {
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$arr = func_get_args();
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return min($arr);
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}
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public function replace($haystack, $needle, $replace) {
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return str_replace($needle, $replace, $haystack);
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}
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/**
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* These two functions are meaningless in SQLite
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* So we return meaningless statement and do nothing
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* @param string $name
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* @param integer $timeout
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* @return string
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*/
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public function get_lock($name, $timeout) {
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return '1=1';
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}
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public function release_lock($name) {
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return '1=1';
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}
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/**
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* MySQL aliases for upper and lower functions
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* @param $string
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* @return string
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*/
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public function ucase($string) {
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return "upper($string)";
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}
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public function lcase($string) {
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return "lower($string)";
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}
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/**
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* MySQL aliases for INET_NTOA and INET_ATON functions
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* @param unsigned integer, string respectively
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* @return string, unsigned integer respectively
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*/
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public function inet_ntoa($num) {
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return long2ip($num);
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}
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public function inet_aton($addr) {
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$int_data = ip2long($addr);
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$unsigned_int_data = sprintf('%u', $address);
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return $unsigned_int_data;
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}
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/**
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* MySQL aliase for DATEDIFF function
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* @param string, string
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* @return string
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*/
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public function datediff($start, $end) {
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/* PHP 5.3.2 has a serious bug in DateTime::diff()
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* see https://bugs.php.net/bug.php?id=51184
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*/
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if (version_compare(PHP_VERSION, '5.3.2', '==')) {
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$start_date = strtotime($start);
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$end_date = strtotime($end);
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$interval = floor(($start_date - $end_date)/(3600*24));
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return $interval;
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} else {
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$start_date = new DateTime($start);
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$end_date = new DateTime($end);
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$interval = $end_date->diff($start_date, false);
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return $interval->format('%r%a');
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}
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}
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}
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?>
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