收藏的PHP常用函数推荐收藏保存

时间：2018-12-30分类：PHP作者：编程之家用户

内容：
<div class="codetitle"><a style="CURSOR: pointer" data="13735" class="copybut" id="copybut13735" onclick="doCopy('code13735')"> 代码如下:

<div class="codetitle"><a style="CURSOR: pointer" data="5449" class="copybut" id="copybut5449" onclick="doCopy('code5449')"> 代码如下:

<div class="codetitle"><a style="CURSOR: pointer" data="83423" class="copybut" id="copybut83423" onclick="doCopy('code83423')"> 代码如下:

<div class="codebody" id="code83423">
<?
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($dateArr[2])) {
return checkdate($dateArr[1],$dateArr[0]);
}
return false;
}
function check_time($time) { //检查时间是否合法时间
$timeArr = explode(":",$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))
return true;
else
return false;
}
return false;
}

<div class="codetitle"><a style="CURSOR: pointer" data="22944" class="copybut" id="copybut22944" onclick="doCopy('code22944')"> 代码如下:

<div class="codebody" id="code22944">
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;
}
?>

PHP重定向
<div class="codetitle"><a style="CURSOR: pointer" data="4381" class="copybut" id="copybut4381" onclick="doCopy('code4381')"> 代码如下:<div class="codebody" id="code4381">
<?
方法一：header("Location: index.php");
方法二：echo "<scrīpt>window.location ="$PHP_SELF";</scrīpt>";
方法三：echo "<META HTTP-EQUIV="Refresh" CONTENT="0; URL=index.php">";
?>

获取访问者浏览器
<div class="codetitle"><a style="CURSOR: pointer" data="86627" class="copybut" id="copybut86627" onclick="doCopy('code86627')"> 代码如下:<div class="codebody" id="code86627">
<?
function browse_infor()
{
$browser="";$browserver="";
$Browsers =array("Lynx","MOSAIC","AOL","Opera","JAVA","MacWeb","WebExplorer","OmniWeb");
$Agent = $GLOBALS["HTTP_USER_AGENT"];
for ($i=0; $i<=7; $i++)
{
if (strpos($Agent,$Browsers[$i]))
{
$browser = $Browsers[$i];
$browserver ="";
}
}
if (ereg("Mozilla",$Agent) && !ereg("MSIE",$Agent))
{
$temp =explode("(",$Agent); $Part=$temp[0];
$temp =explode("/",$Part); $browserver=$temp[1];
$temp =explode(" ",$browserver); $browserver=$temp[0];
$browserver =preg_replace("/([d.]+)/","1",$browserver);
$browserver = " $browserver";
$browser = "Netscape Navigator";
}
if (ereg("Mozilla",$Agent) && ereg("Opera",$Agent); $Part=$temp[1];
$temp =explode(")",$browserver);$browserver=$temp[2];
$browserver =preg_replace("/([d.]+)/",$browserver);
$browserver = " $browserver";
$browser = "Opera";
}
if (ereg("Mozilla",$Agent) && ereg("MSIE",$Agent))
{
$temp = explode("(",$Agent); $Part=$temp[1];
$temp = explode(";",$Part); $Part=$temp[1];
$temp = explode(" ",$Part);$browserver=$temp[2];
$browserver =preg_replace("/([d.]+)/",$browserver);
$browserver = " $browserver";
$browser = "Internet Explorer";
}
if ($browser!="")
{
$browseinfo = "$browser$browserver";
}
else
{
$browseinfo = "Unknown";
}
return $browseinfo;
}
//调用方法$browser=browseinfo() ;直接返回结果
?>

获取访问者操作系统
<div class="codetitle"><a style="CURSOR: pointer" data="13331" class="copybut" id="copybut13331" onclick="doCopy('code13331')"> 代码如下:<div class="codebody" id="code13331">
<?
function osinfo() {
$os="";
$Agent = $GLOBALS["HTTP_USER_AGENT"];
if (eregi('win',$Agent) && strpos($Agent,'95')) {
$os="Windows 95";
}
elseif (eregi('win 9x','4.90')) {
$os="Windows ME";
}
elseif (eregi('win',$Agent) && ereg('98',$Agent)) {
$os="Windows 98";
}
elseif (eregi('win',$Agent) && eregi('nt 5.0',$Agent)) {
$os="Windows 2000";
}
elseif (eregi('win',$Agent) && eregi('nt',$Agent)) {
$os="Windows NT";
}
elseif (eregi('win',$Agent) && eregi('nt 5.1',$Agent)) {
$os="Windows XP";
}
elseif (eregi('win',$Agent) && ereg('32',$Agent)) {
$os="Windows 32";
}
elseif (eregi('linux',$Agent)) {
$os="Linux";
}
elseif (eregi('unix',$Agent)) {
$os="Unix";
}
elseif (eregi('sun',$Agent) && eregi('os',$Agent)) {
$os="SunOS";
}
elseif (eregi('ibm',$Agent)) {
$os="IBM OS/2";
}
elseif (eregi('Mac',$Agent) && eregi('PC',$Agent)) {
$os="Macintosh";
}
elseif (eregi('PowerPC',$Agent)) {
$os="PowerPC";
}
elseif (eregi('AIX',$Agent)) {
$os="AIX";
}
elseif (eregi('HPUX',$Agent)) {
$os="HPUX";
}
elseif (eregi('NetBSD',$Agent)) {
$os="NetBSD";
}
elseif (eregi('BSD',$Agent)) {
$os="BSD";
}
elseif (ereg('OSF1',$Agent)) {
$os="OSF1";
}
elseif (ereg('IRIX',$Agent)) {
$os="IRIX";
}
elseif (eregi('FreeBSD',$Agent)) {
$os="FreeBSD";
}
if ($os=='') $os = "Unknown";
return $os;
}
//调用方法$os=os_infor() ;
?>

文件格式类
<div class="codetitle"><a style="CURSOR: pointer" data="33221" class="copybut" id="copybut33221" onclick="doCopy('code33221')"> 代码如下:<div class="codebody" id="code33221">
<?
$mime_types = array(
'gif' => 'image/gif',
'jpg' => 'image/jpeg',
'jpeg' => 'image/jpeg',
'jpe' => 'image/jpeg',
'bmp' => 'image/bmp',
'png' => 'image/png',
'tif' => 'image/tiff',
'tiff' => 'image/tiff',
'pict' => 'image/x-pict',
'pic' => 'image/x-pict',
'pct' => 'image/x-pict',
'psd' => 'image/x-photoshop',
'swf' => 'application/x-shockwave-flash',
'js' => 'application/x-javascrīpt',
'pdf' => 'application/pdf',
'ps' => 'application/postscrīpt',
'eps' => 'application/postscrīpt',
'ai' => 'application/postscrīpt',
'wmf' => 'application/x-msmetafile',
'css' => 'text/css',
'htm' => 'text/html',
'html' => 'text/html',
'txt' => 'text/plain',
'xml' => 'text/xml',
'wml' => 'text/wml',
'wbmp' => 'image/vnd.wap.wbmp',
'mid' => 'audio/midi',
'wav' => 'audio/wav',
'mp3' => 'audio/mpeg',
'mp2' => 'audio/mpeg',
'avi' => 'video/x-msvideo',
'mpeg' => 'video/mpeg',
'mpg' => 'video/mpeg',
'qt' => 'video/quicktime',
'mov' => 'video/quicktime',
'lha' => 'application/x-lha',
'lzh' => 'application/x-lha',
'z' => 'application/x-compress',
'gtar' => 'application/x-gtar',
'gz' => 'application/x-gzip',
'gzip' => 'application/x-gzip',
'tgz' => 'application/x-gzip',
'tar' => 'application/x-tar',
'bz2' => 'application/bzip2',
'zip' => 'application/zip',
'arj' => 'application/x-arj',
'rar' => 'application/x-rar-compressed',
'hqx' => 'application/mac-binhex40',
'sit' => 'application/x-stuffit',
'bin' => 'application/x-macbinary',
'uu' => 'text/x-uuencode',
'uue' => 'text/x-uuencode',
'latex'=> 'application/x-latex',
'ltx' => 'application/x-latex',
'tcl' => 'application/x-tcl',
'pgp' => 'application/pgp',
'asc' => 'application/pgp',
'exe' => 'application/x-msdownload',
'doc' => 'application/msword',
'rtf' => 'application/rtf',
'xls' => 'application/vnd.ms-excel',
'ppt' => 'application/vnd.ms-powerpoint',
'mdb' => 'application/x-msaccess',
'wri' => 'application/x-mswrite',
);
?>

php生成excel文档
<div class="codetitle"><a style="CURSOR: pointer" data="108" class="copybut" id="copybut108" onclick="doCopy('code108')"> 代码如下:<div class="codebody" id="code108">
<?
header("Content-type:application/vnd.ms-excel");
header("Content-Disposition:filename=test.xls");
echo "test1t";
echo "test2tn";
echo "test1t";
echo "test2tn";
echo "test1t";
echo "test2tn";
echo "test1t";
echo "test2tn";
echo "test1t";
echo "test2tn";
echo "test1t";
echo "test2tn";
//改动相应文件头就可以输出.doc .xls等文件格式了
?>

时间比较问题
举一个简单例子说明:比如一个论坛对当天发表的贴子用new图片标记一下。
方法一：
<div class="codetitle"><a style="CURSOR: pointer" data="99445" class="copybut" id="copybut99445" onclick="doCopy('code99445')"> 代码如下:<div class="codebody" id="code99445">
<?
//$db->rows[$i][date]中为数据库中datetime字段值.
$today=time();
$theDay=date("Y-m-d H:i:s",$today-243600);
$newTag=$db->rows[$i][date]>=$theDay?"":"";
//方法二：
$newTag=$db->rows[$i][date]>=date("Y-m-d 00:00:00")?"":"";
?>

<div class="codetitle"><a style="CURSOR: pointer" data="74878" class="copybut" id="copybut74878" onclick="doCopy('code74878')"> 代码如下:<div class="codebody" id="code74878">
//提取页面和浏览器提交的变量，作用相当于使PHP.INI开了全局变量
<?
@extract($_SERVER,EXTR_SKIP);
@extract($_SESSION,EXTR_SKIP);
@extract($_POST,EXTR_SKIP);
@extract($_FILES,EXTR_SKIP);
@extract($_GET,EXTR_SKIP);
@extract($_ENV,EXTR_SKIP);
?>

<div class="codetitle"><a style="CURSOR: pointer" data="48579" class="copybut" id="copybut48579" onclick="doCopy('code48579')"> 代码如下:<div class="codebody" id="code48579">
//读取文件函数
<?
function readfromfile($file_name) {
if (file_exists($file_name)) {
$filenum=fopen($file_name,"r");
flock($filenum,LOCK_EX);
$file_data=fread($filenum,filesize($file_name));
rewind($filenum);
fclose($filenum);
return $file_data;
}
}
?>

<div class="codetitle"><a style="CURSOR: pointer" data="918" class="copybut" id="copybut918" onclick="doCopy('code918')"> 代码如下:<div class="codebody" id="code918">
//写入文件函数
<?
function writetofile($file_name,$data,$method="w") {
$filenum=fopen($file_name,$method);
flock($filenum,LOCK_EX);
$file_data=fwrite($filenum,$data);
fclose($filenum);
return $file_data;
}
?>

<div class="codetitle"><a style="CURSOR: pointer" data="43902" class="copybut" id="copybut43902" onclick="doCopy('code43902')"> 代码如下:<div class="codebody" id="code43902">
//页面快速转向
<?
function turntopage($url="index.php",$info = "页面转向中...",$second=2){
print "nn页面转向中....n";
print "<meta http-equiv="refresh" content="$second;url=$url">n";
print "<style type="text/css">nnn";
print "nn";
print "<table width="100%" border="0" align="center">n";
print " <tr>n";
print " <td height="200"> </td>n";
print " </tr>n";
print " <tr>n";
print " <td align="center">n";
print " <table width="60%" border="0" cellpadding="8" bgcolor="#AA9FFF">n";
print " <tr>n";
print " <td height="30" align="center">页面转向提示信息</td>n";
print " </tr>n";
print " <tr>n";
print " <td align="center">$info</td>n";
print " </tr>n";
print " <tr>n";
print " <td align="center">n";
print " <a href="$url">如果你的浏览器不支持自动跳转,请按这里</td>n";
print " </tr>n";
print " </tr>n";
print " </table></td>n";
print " </tr>n";
print " <tr>n";
print " <td height="200"> </td>n";
print " </tr>n";
print "</table>n";
print "n";
exit;
?>

产生随机字符串函数
<div class="codetitle"><a style="CURSOR: pointer" data="68064" class="copybut" id="copybut68064" onclick="doCopy('code68064')"> 代码如下:<div class="codebody" id="code68064">
<?
function random($length) {
$hash = @#@#;
$chars = @#ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz@#;
$max = strlen($chars) - 1;
mt_srand((double)microtime() 1000000);
for($i = 0; $i < $length; $i++) {
$hash .= $chars[mt_rand(0,$max)];
}
return $hash;
}
?>

截取一定长度的字符串（该函数对GB2312使用有效）
<div class="codetitle"><a style="CURSOR: pointer" data="95577" class="copybut" id="copybut95577" onclick="doCopy('code95577')"> 代码如下:<div class="codebody" id="code95577">
<?
function Wordscut($string,$length,$sss=0) {
if(strlen($string) > $length) {
if($sss){
$length=$length - 3;
$addstr=@# ...@#;
}
for($i = 0; $i < $length; $i++) {
if(ord($string[$i]) > 127) {
$wordscut .= $string[$i].$string[$i + 1];
$i++;
} else {
$wordscut .= $string[$i];
}
}
return $wordscut.$addstr;
}
return $string;
}
?>

取得客户端IP地址
<div class="codetitle"><a style="CURSOR: pointer" data="59924" class="copybut" id="copybut59924" onclick="doCopy('code59924')"> 代码如下:<div class="codebody" id="code59924">
<?
function GetIP(){
if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"),"unknown"))
$ip = getenv("HTTP_CLIENT_IP");
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[@#REMOTEADDR@#];
else
$ip = "unknown";
return($ip);
}
?>

判断邮箱地址
<div class="codetitle"><a style="CURSOR: pointer" data="93441" class="copybut" id="copybut93441" onclick="doCopy('code93441')"> 代码如下:<div class="codebody" id="code93441">
<?
function checkEmail($inAddress)
{
return (ereg("^([a-zA-Z0-9-])+@([a-zA-Z0-9-])+(.[a-zA-Z0-9-])+",$inAddress));
}
?>

分页（两个函数配合使用）
<div class="codetitle"><a style="CURSOR: pointer" data="66333" class="copybut" id="copybut66333" onclick="doCopy('code66333')"> 代码如下:<div class="codebody" id="code66333">
<?
function getpage($sql,$page_size=20)
{
global $page,$totalpage,$sums; //out param
$page = $_GET["page"];
//$eachpage = $page_size;
$pagesql = strstr($sql," from ");
$pagesql = "select count() as ids ".$pagesql;
$result = mysql_query($pagesql);
if($rs = mysql_fetch_array($result)) $sums = $rs[0];
$totalpage = ceil($sums/$page_size);
if((!$page)($page<1)) $page=1;
$startpos = ($page-1)$page_size;
$sql .=" limit $startpos,$page_size ";
return $sql;
}
function showbar($string="")
{
global $page,$totalpage;
$out="共<font ".$totalpage."color=@#red@#>".$totalpage."页 ";
$linkNum =4;
$start = ($page-round($linkNum/2))>0 ? ($page-round($linkNum/2)) : "1";
$end = ($page+round($linkNum/2))<$totalpage ? ($page+round($linkNum/2)) : $totalpage;
$prestart=$start-1;
$nextend=$end+1;
if($page<>1)
$out .= "<a href=@#?page=1&&".$string."@#title=第一页>第一页 ";
if($start>1)
$out.="<a href=@#?page=".$prestart."@# title=上一页>..<< ";
for($t=$start;$t<=$end;$t++)
{
$out .= ($page==$t) ? "<font [".$t."]color=@#red@#>[".$t."] " : "<a $thref=@#?page=$t&&".$string."@#>$t ";
}
if($end<$totalpage)
$out.="<a href=@#?page=".$nextend."&&".$string."@# title=下一页>>>..";
if($page<>$totalpage)
$out .= " <a href=@#?page=".$totalpage."&&".$string."@# title=最后页>最后页";
return $out;
}
?>

获取新插入数据的ID
<div class="codetitle"><a style="CURSOR: pointer" data="74214" class="copybut" id="copybut74214" onclick="doCopy('code74214')"> 代码如下:<div class="codebody" id="code74214">
<?
mysql_insert_id();
?>

<div class="codetitle"><a style="CURSOR: pointer" data="24012" class="copybut" id="copybut24012" onclick="doCopy('code24012')"> 代码如下:<div class="codebody" id="code24012">
//获得当前的脚本网址
<?
function get_php_url(){
if(!empty($_server["REQUEST_URI"])){
$scriptName = $_SERVER["REQUEST_URI"];
$nowurl = $scriptName;
}else{
$scriptName = $_SERVER["PHP_SELF"];
if(empty($_SERVER["QUERY_STRING"])) $nowurl = $scriptName;
else $nowurl = $scriptName."?".$_SERVER["QUERY_STRING"];
}
return $nowurl;
}
?>

<div class="codetitle"><a style="CURSOR: pointer" data="1177" class="copybut" id="copybut1177" onclick="doCopy('code1177')"> 代码如下:<div class="codebody" id="code1177">
//把全角数字转为半角数字
<?
function GetAlabNum($fnum){
$nums = array("０","１","２","３","４","５","６","７","８","９");
$fnums = "0123456789";
for($i=0;$i<=9;$i++) $fnum = str_replace($nums[$i],$fnums[$i],$fnum);
$fnum = ereg_replace("[^0-9.]|^0{1,}","",$fnum);
if($fnum=="") $fnum=0;
return $fnum;
}
?>

<div class="codetitle"><a style="CURSOR: pointer" data="96240" class="copybut" id="copybut96240" onclick="doCopy('code96240')"> 代码如下:<div class="codebody" id="code96240">
//去除HTML标记
<?
function Text2Html($txt){
$txt = str_replace(" ","　",$txt);
$txt = str_replace("<","<",$txt);
$txt = str_replace(">",">",$txt);
$txt = preg_replace("/[rn]{1,}/isU","
rn",$txt);
return $txt;
}
?>

<div class="codetitle"><a style="CURSOR: pointer" data="84491" class="copybut" id="copybut84491" onclick="doCopy('code84491')"> 代码如下:<div class="codebody" id="code84491">
//相对路径转化成绝对路径
<?
function relative_to_absolute($content,$feed_url) {
preg_match('/(http|https|ftp):///',$feed_url,$protocol);
$server_url = preg_replace("/(http|https|ftp|news):///",$feed_url);
$server_url = preg_replace("//./",$server_url);
if ($server_url == '') {
return $content;
}
if (isset($protocol[0])) {
$new_content = preg_replace('/href="//','href="'.$protocol[0].$server_url.'/',$content);
$new_content = preg_replace('/src="//','src="'.$protocol[0].$server_url.'/',$new_content);
} else {
$new_content = $content;
}
return $new_content;
}
?>

<div class="codetitle"><a style="CURSOR: pointer" data="19739" class="copybut" id="copybut19739" onclick="doCopy('code19739')"> 代码如下:<div class="codebody" id="code19739">
//取得所有链接
<?
function get_all_url($code){
preg_match_all('/<as+href=["|']?([^>"' ]+)["|']?s[^>]>([^>]+)/i',$code,$arr);
return array('name'=>$arr[2],'url'=>$arr[1]);
}
?>

<div class="codetitle"><a style="CURSOR: pointer" data="13994" class="copybut" id="copybut13994" onclick="doCopy('code13994')"> 代码如下:<div class="codebody" id="code13994">
//HTML表格的每行转为CSV格式数组
<?
function get_tr_array($table) {
$table = preg_replace("'<td[^>]?>'si",'"',$table);
$table = str_replace("</td>",'",',$table);
$table = str_replace("</tr>","{tr}",$table);
//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);
$table = explode(",{tr}",$table);
array_pop($table);
return $table;
}
?>

<div class="codetitle"><a style="CURSOR: pointer" data="57788" class="copybut" id="copybut57788" onclick="doCopy('code57788')"> 代码如下:<div class="codebody" id="code57788">
//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);
$table = preg_replace("'<tr[^>]?>'si",$table);
$table = preg_replace("'<td[^>]*?>'si","{td}",$table);
$table = explode('{tr}',$table);
array_pop($table);
foreach ($table as $key=>$tr) {
$td = explode('{td}',$tr);
array_pop($td);
$td_array[] = $td;
}
return $td_array;
}
?>

<div class="codetitle"><a style="CURSOR: pointer" data="99849" class="copybut" id="copybut99849" onclick="doCopy('code99849')"> 代码如下:<div class="codebody" id="code99849">
//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]);
return $match[1];
}
?>

<div class="codetitle"><a style="CURSOR: pointer" data="47106" class="copybut" id="copybut47106" onclick="doCopy('code47106')"> 代码如下:<div class="codebody" id="code47106">
//打印出为本PHP项目做出贡献的人员的清单
<?
string phpcredits(void)
?>

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