这里的日期操作函数有时间的增加，计算出给出的日期是星期几 ，检查日期是否合法日期 时间比较函数，返回两个日期相差几秒、几分钟、几小时或几天
<?php
function dateadd($date, $int, $unit = "d") {//时间的增加（还可以改进成时分秒都可以增加，有时间再补上）
$datearr = explode("-", $date);
$value[$unit] = $int;//
return date("y-m-d", mktime(0,0,0, $datearr[1] + $value['m'], $datearr[2] + $value['d'], $datearr[0] + $value['y']));
//一聚教程网
}
function getweekday($date) { //计算出给出的日期是星期几
$datearr = explode("-", $date);
return date("w", mktime(0,0,0,$datearr[1],$datearr[2],$datearr[0]));//
}
?>
<?
function check_date($date) { //检查日期是否合法日期
$datearr = explode("-", $date);
if (is_numeric($datearr[0]) && is_numeric($datearr[1]) && is_numeric($datearr[2])) { //一聚教程网
return checkdate($datearr[1],$datearr[2],$datearr[0]);
}
return false;
}
function check_time($time) { //检查时间是否合法时间//一聚教程网
$timearr = explode(":", $time);
if (is_numeric($timearr[0]) && is_numeric($timearr[1]) && is_numeric($timearr[2])) {//
if (($timearr[0] >= 0 && $timearr[0] <= 23) && ($timearr[1] >= 0 && $timearr[1] <= 59) && ($timearr[2] >= 0 && $timearr[2] <= 59))
//php
return true;
else
return false;
}
return false;
}
function datediff($date1, $date2, $unit = "") {//时间比较函数，返回两个日期相差几秒、几分钟、几小时或几天
//
switch ($unit) {
case 's':
$dividend = 1;
break;
case 'i':
$dividend = 60;break;
case 'h':
$dividend = 3600;
break;
case 'd':
$dividend = 86400;
break; //
default:
$dividend = 86400;
}
$time1 = strtotime($date1);
$time2 = strtotime($date2);
if ($time1 && $time2) //
return (float)($time1 - $time2) / $dividend;
return false;
}
?>
取得客户端ip地址
<?//开源代码
function getip(){
if (getenv("http_client_ip") && strcasecmp(getenv("http_client_ip"), "unknown"))
$ip = getenv("http_client_ip"); //开源
else if (getenv("http_x_forwarded_for") && strcasecmp(getenv("http_x_forwarded_for"), "unknown"))
$ip = getenv("http_x_forwarded_for"); //
else if (getenv("remote_addr") && strcasecmp(getenv("remote_addr"), "unknown"))
$ip = getenv("remote_addr");
else if (isset($_server[@#remote_addr@#]) && $_server[@#remote_addr@#] && strcasecmp($_server[@#remote_addr@#], "unknown"))//
$ip = $_server[@#remote_addr@#];
else
$ip = "unknown";
return($ip);
}
?>判断邮箱地址
<?
function checkemail($inaddress)
{
return (ereg("^([a-za-z0-9_-])+@([a-za-z0-9_-])+(.[a-za-z0-9_-])+",$inaddress));
}
?><?
function getip() { //获取ip
if ($_server["http_x_forwarded_for"])
$ip = $_server["http_x_forwarded_for"]; //
else if ($_server["http_client_ip"])
$ip = $_server["http_client_ip"];
else if ($_server["remote_addr"])
$ip = $_server["remote_addr"]; //
else if (getenv("http_x_forwarded_for"))
$ip = getenv("http_x_forwarded_for");
else if (getenv("http_client_ip"))
$ip = getenv("http_client_ip"); //
else if (getenv("remote_addr"))
$ip = getenv("remote_addr");
else
$ip = "unknown";
return $ip;
}
?>
//html表格的每行转为csv格式数组
<?
function get_tr_array($table) {//php教程开源代码
$table = preg_replace("'<td[^>]*?>'si",'"',$table);
$table = str_replace("</td>",'",',$table);
$table = str_replace("</tr>","{tr}",$table); //开源代码osphp.com.cn
//去掉 html 标记
$table = preg_replace("'<[/!]*?[^<>]*?>'si","",$table);
//去掉空白字符
$table = preg_replace("'([rn])[s]+'","",$table);
$table = str_replace(" ","",$table);
$table = str_replace(" ","",$table);
$table = explode(",{tr}",$table);array_pop($table);
return $table;
}
?>
//将html表格的每行每列转为数组，采集表格数据
<?
function get_td_array($table) {
$table = preg_replace("'<table[^>]*?>'si","",$table);//osphp.com.cn
$table = preg_replace("'<tr[^>]*?>'si","",$table);
$table = preg_replace("'<td[^>]*?>'si","",$table);
$table = str_replace("</tr>","{tr}",$table); //开源代码osphp.com.cn
$table = str_replace("</td>","{td}",$table);
//去掉 html 标记
$table = preg_replace("'<[/!]*?[^<>]*?>'si","",$table); //osphp.com.cn开源
//去掉空白字符
$table = preg_replace("'([rn])[s]+'","",$table);
$table = str_replace(" ","",$table);
$table = str_replace(" ","",$table);
$table = explode('{tr}', $table);
array_pop($table); //php开源代码
foreach ($table as $key=>$tr) {
$td = explode('{td}', $tr);
array_pop($td);
$td_array[] = $td; // }
return $td_array;
}
?>
//返回字符串中的所有单词 $distinct=true 去除重复
<?
function split_en_str($str,$distinct=true) {
preg_match_all('/([a-za-z]+)/',$str,$match);
if ($distinct == true) {
$match[1] = array_unique($match[1]);
}
sort($match[1]); //osphp.com.cn
return $match[1];
}
?>
//取得所有链接
<?
function get_all_url($code){
preg_match_all('/<as+href=["|']?([^>"' ]+)["|']?s*[^>]*>([^>]+)</a>/i',$code,$arr); //osphp.com.cn
return array('name'=>$arr[2],'url'=>$arr[1]);
}
?>
这个类适用于配合数据库教程查询分页，和数组分页。下面有使用方法。
[php教程]
<?php
/*
* 名称: 分页类
* 介绍: 适用于数组分页和配合sql查询的分页
* 作者: idlion || moonfly (id_lion@hotmail.com)
* 创建时间: 2006-02-18
* 最后修改: 2007-05-24
*/
class pagebreak {
private $mtotalrowsnum = 0; // 总信息行数
private $mcurpagenumber = 1; // 当前所在页
private $mtotalpagesnum = 1; // 总页数
private $mquerystring; // 页面传递的数据(url?后的字符串)
private $mpagerowsnum = 20; // 每页显示行数
private $mindexbarlength = 5; // 索引条的页数
private $mindexbar = ''; // 页码索引条
private $mpageinfo = ''; // 分页信息
// 页码索引条样式
private $mnextbutton = "<font style="font-family:webdings">8</font>";
private $mprebutton = "<font style="font-family:webdings">7</font>";
private $mfirstbutton = "<font style="font-family:webdings">9</font>";
private $mlastbutton = "<font style="font-family:webdings">:</font>";
private $mcss教程indexbarcurpage = "font-weight:bold;color:#ff0000";
private $mcssindexbarpage = '';
// 分页信息样式
private $mcsspageinfonumfont = 'color:#ff0000';
private $mcsspageinfofont = '';// 构造方法
public function __construct(&$rsqlquery, $userpagerowsnum='') {
if( !is_array($rsqlquery) ) {
$this->setdbpagebreak($rsqlquery, $userpagerowsnum);
}
else {
$this->setarraypagebreak($rsqlquery, $userpagerowsnum);
}
}// 设置数据库型分页
private function setdbpagebreak(&$rsqlquery, $userpagerowsnum='') {
$this->setdbtotalrowsnum($rsqlquery);
$this->settotalpagesnum($userpagerowsnum);
if( $this->mtotalpagesnum > 1 ) {
$this->setcurpagenumber();
$this->setsqlquery($rsqlquery);
$this->setquerystring();
$this->setindexbar();
$this->setpageinfo();
}
}// 设置数组型分页
private function setarraypagebreak(&$rarray, $userpagerowsnum='', $usertotalrowsnum='') {
$this->setarraytotalrowsnum($rarray, $usertotalrowsnum);
$this->settotalpagesnum($userpagerowsnum);
if( $this->mtotalpagesnum > 1 ) {
$this->setcurpagenumber();
$this->setarray($rarray);
$this->setquerystring();
$this->setindexbar();
$this->setpageinfo();
}
}// 数据库型计算总行数
private function setdbtotalrowsnum($rsqlquery) {
$this->mtotalrowsnum = mysql教程_num_rows( mysql_query($rsqlquery) );
}// 数组型计算总行数
private function setarraytotalrowsnum($array) {
$this->mtotalrowsnum = count($array);
}// 计算总页数
private function settotalpagesnum($userpagerowsnum='') {
if( $userpagerowsnum ) {
$this->mpagerowsnum = $userpagerowsnum;
}
$this->mtotalpagesnum = (int)( floor( ($this->mtotalrowsnum-1)/$this->mpagerowsnum )+1 );
}// 计算当前页数
private function setcurpagenumber() {
if( $_get['cur_page'] ) {
$this->mcurpagenumber = $_get['cur_page'];
}
}// 修正sql截取语句
private function setsqlquery(&$rsqlquery) {
$start_number = ($this->mcurpagenumber-1)*$this->mpagerowsnum;
$rsqlquery .= " limit ".$start_number.",".$this->mpagerowsnum;
}// 修正截取后的array
private function setarray(&$rarray) {
$start_number = ($this->mcurpagenumber-1)*$this->mpagerowsnum;
$rarray = array_slice($rarray, $start_number, $this->mpagerowsnum);
}// 修正 $_get 传递数据
private function setquerystring() {
$query_string = $_server['query_string'];
if ( $query_string == '' ) {
$this->mquerystring = "?cur_page=";
}
else {
$this->mquerystring = preg_replace("/&?cur_page=d+/", '', $query_string);
$this->mquerystring = "?".$this->mquerystring."&cur_page=";
}
}// 设置页码索引条
private function getpageindex() {
if( $this->mtotalpagesnum <= $this->mindexbarlength ) {
$first_number = 1;
$last_number = $this->mtotalpagesnum;
}
else {
$offset = (int)floor($this->mindexbarlength/2);
if( ($this->mcurpagenumber-$offset) <= 1 ) {
$first_number = 1;
}
elseif( ($this->mcurpagenumber+$offset) > $this->mtotalpagesnum ) {
$first_number = $this->mtotalpagesnum-$this->mindexbarlength+1;
}
else {
$first_number = $this->mcurpagenumber-$offset;
}
$last_number = $first_number+$this->mindexbarlength-1;
}
$last_number;
for( $i=$first_number; $i<=$last_number; $i++ ) {
if( $this->mcurpagenumber == $i ) {
$page_index .= "<font style='".$this->mcssindexbarcurpage."'>".$i."</font> ";
}
else {
$page_index .= "<a href='".$this->mquerystring.$i."' style='".$this->mcssindexbarpage."'>".$i."</a> ";
}
}
return $page_index;
}// 设置页码索引条
private function setindexbar() {
$this->mindexbar = $this->getnavfirstbutton();
$this->mindexbar .= $this->getnavprebutton();
$this->mindexbar .= $this->getpageindex();
$this->mindexbar .= $this->getnavnextbutton();
$this->mindexbar .= $this->getnavlastbutton();
}// 得到页码索引条 首页按钮
private function getnavfirstbutton() {
return "<a href='".$this->mquerystring."1'>".$this->mfirstbutton."</a> ";
}// 得到页码索引条 上一页按钮
private function getnavprebutton() {
if( $this->mcurpagenumber>1 ) {
$pre_number = $this->mcurpagenumber-1;
}
else {
$pre_number = 1;
}
return "<a href='".$this->mquerystring.$pre_number."'>".$this->mprebutton."</a> ";
}// 得到页码索引条 下一页按钮
private function getnavnextbutton() {
if( $this->mcurpagenumber<$this->mtotalpagesnum ) {
$next_number = $this->mcurpagenumber+1;
}
else {
$next_number = $this->mtotalpagesnum;
}
return "<a href='".$this->mquerystring.$next_number."'>".$this->mnextbutton."</a> ";
}// 得到页码索引条 末页按钮
private function getnavlastbutton() {
return "<a href='".$this->mquerystring.$this->mtotalpagesnum."'>".$this->mlastbutton."</a> ";
}// 设置分页信息
private function setpageinfo() {
$this->mpageinfo ="<font style='".$this->mcsspageinfofont."'>";
$this->mpageinfo .= "共 <font style='".$this->mcsspageinfonumfont."'>".$this->mtotalrowsnum."</font> 条信息 | ";
$this->mpageinfo .= "<font style='".$this->mcsspageinfonumfont."'>".$this->mpagerowsnum."</font> 条/页 | ";
$this->mpageinfo .= "共 <font style='".$this->mcsspageinfonumfont."'>".$this->mtotalpagesnum."</font> 页 | ";
$this->mpageinfo .= "第 <font style='".$this->mcsspageinfonumfont."'>".$this->mcurpagenumber."</font> 页";
$this->mpageinfo .= "</font>";
}// 取出页码索引条
public function getindexbar() {
return $this->mindexbar;
}// 取出分页信息
public function getpageinfo() {
return $this->mpageinfo;
}}
?>
[/php]