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继续收藏一些PHP常用函数第1/2页

2019年05月10日  | 移动技术网IT编程  | 我要评论

//页面快速转向
复制代码 代码如下:

<?
function turntopage($url="index.php",$info = "页面转向中...",$second=2){
print "<html>n<head>n<title>页面转向中....</title>n";
print "<meta http-equiv="refresh" content="$second;url=$url">n";
print "<style type="text/css">n<!--n";
print "td { font-family: "verdana", "arial";font-size: 12px}n";
print "a {color: #000000; text-decoration: none}n";
print "-->n</style>n";
print "</head>n<body>n";
print "<table width="100%" border="0" align="center">n";
print " <tr>n";
print " <td height="200"> </td>n";
print " </tr>n";
print " <tr>n";
print " <td align="center">n";
print " <table width="60%" border="0" cellpadding="8" bgcolor="#aa9fff">n";
print " <tr>n";
print " <td height="30" align="center">页面转向提示信息</td>n";
print " </tr>n";
print " <tr>n";
print " <td align="center">$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</a></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 "</body>n</html>";
exit;
?>

产生随机字符串函数
复制代码 代码如下:

<?
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）
复制代码 代码如下:

<?
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
复制代码 代码如下:

<?
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[@#remote_addr@#];
else
$ip = "unknown";
return($ip);
}
?>

判断邮箱地址
复制代码 代码如下:

<?
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）
复制代码 代码如下:

<?
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@#><b>".$totalpage."</b></font>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</a> ";
if($start>1)
$out.="<a href=@#?page=".$prestart."@# title=上一页>..<<</a> ";
for($t=$start;$t<=$end;$t++)
{
$out .= ($page==$t) ? "<font [".$t."]color=@#red@#><b>[".$t."]</b></font> " : "<a $thref=@#?page=$t&&".$string."@#>$t</a> ";
}
if($end<$totalpage)
$out.="<a href=@#?page=".$nextend."&&".$string."@# title=下一页>>>..</a>";
if($page<>$totalpage)
$out .= " <a href=@#?page=".$totalpage."&&".$string."@# title=最后页>最后页</a>";
return $out;
}
?>

获取新插入数据的id
复制代码 代码如下:

<?
mysql_insert_id();
?>

//获得当前的脚本网址
复制代码 代码如下:

<?
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;
}
?>

//把全角数字转为半角数字
复制代码 代码如下:

<?
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;
}
?>

//去除html标记
复制代码 代码如下:

<?
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;
}
?>

//相对路径转化成绝对路径
复制代码 代码如下:

<?
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;
}
?>

//取得所有链接
复制代码 代码如下:

<?
function get_all_url($code){
preg_match_all('/<as+href=["|']?([^>"' ]+)["|']?s*[^>]*>([^>]+)</a>/i',$code,$arr);
return array('name'=>$arr[2],'url'=>$arr[1]);
}
?>

//html表格的每行转为csv格式数组
复制代码 代码如下:

<?
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);
$table = str_replace(" ","",$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
复制代码 代码如下:

<?
function get_td_array($table) {
$table = preg_replace("'<table[^>]*?>'si","",$table);
$table = preg_replace("'<tr[^>]*?>'si","",$table);
$table = preg_replace("'<td[^>]*?>'si","",$table);
$table = str_replace("</tr>","{tr}",$table);
$table = str_replace("</td>","{td}",$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);
$table = str_replace(" ","",$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;
}
?>

//返回字符串中的所有单词 $distinct=true 去除重复
复制代码 代码如下:

<?
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];
}
?>

//打印出为本php项目做出贡献的人员的清单
复制代码 代码如下:

<?
string phpcredits(void)
?>

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