繼續(xù)收藏一些PHP常用函數(shù)

更新時間：2008年08月17日 12:17:26 作者：

方便以后制作php程序，直接拿來就可以用了，其實一些好的函數(shù)都在一些較成熟的cms系統(tǒng)中都有，例如dedecms，帝國cms,phpcms等，不論是gb2312的還是utf8格式的都有。

//頁面快速轉(zhuǎn)向

 
<? 
function turntopage($url="index.php",$info = "頁面轉(zhuǎn)向中...",$second=2){ 
print "<html>n<head>n<title>頁面轉(zhuǎn)向中....</title>n"; 
print "<meta http-equiv="refresh" content="$second;url=$url">n"; 
print "<style type="text/css">n<!--n"; 
print "td { font-family: "Verdana", "Arial";font-size: 12px}n"; 
print "A {COLOR: #000000; TEXT-DECORATION: none}n"; 
print "-->n</style>n"; 
print "</head>n<body>n"; 
print "<table width="100%" border="0" align="center">n"; 
print " <tr>n"; 
print " <td height="200"> </td>n"; 
print " </tr>n"; 
print " <tr>n"; 
print " <td align="center">n"; 
print " <table width="60%" border="0" cellpadding="8" bgcolor="#AA9FFF">n"; 
print " <tr>n"; 
print " <td height="30" align="center">頁面轉(zhuǎn)向提示信息</td>n"; 
print " </tr>n"; 
print " <tr>n"; 
print " <td align="center">$info</td>n"; 
print " </tr>n"; 
print " <tr>n"; 
print " <td align="center">n"; 
print " <a href="$url">如果你的瀏覽器不支持自動跳轉(zhuǎn),請按這里</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; 
?> 

產(chǎn)生隨機字符串函數(shù)

復(fù)制代碼代碼如下:

 
<? 
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; 
} 
?> 

截取一定長度的字符串（該函數(shù)對GB2312使用有效）

復(fù)制代碼代碼如下:

 
<? 
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; 
} 
?> 

取得客戶端IP地址

復(fù)制代碼代碼如下:

 
<? 
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); 
} 
?> 

判斷郵箱地址

復(fù)制代碼代碼如下:

 
<? 
function checkEmail($inAddress) 
{ 
return (ereg("^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(.[a-zA-Z0-9_-])+",$inAddress)); 
} 
?> 

分頁（兩個函數(shù)配合使用）

復(fù)制代碼代碼如下:

 
<? 
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>頁 "; 
$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=第一頁>第一頁</a> "; 
if($start>1) 
$out.="<a href=@#?page=".$prestart."@# title=上一頁>..<<</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."&&".$string."@# title=下一頁>>>..</a>"; 
if($page<>$totalpage) 
$out .= " <a href=@#?page=".$totalpage."&&".$string."@# title=最后頁>最后頁</a>"; 
return $out; 
} 
?> 

獲取新插入數(shù)據(jù)的ID

復(fù)制代碼代碼如下:

 
<? 
mysql_insert_id(); 
?> 

//獲得當(dāng)前的腳本網(wǎng)址

復(fù)制代碼代碼如下:

 
<? 
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; 
} 
?> 

//把全角數(shù)字轉(zhuǎn)為半角數(shù)字

復(fù)制代碼代碼如下:

 
<? 
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標(biāo)記

復(fù)制代碼代碼如下:

 
<? 
function Text2Html($txt){ 
$txt = str_replace(" ","　",$txt); 
$txt = str_replace("<","&lt;",$txt); 
$txt = str_replace(">","&gt;",$txt); 
$txt = preg_replace("/[rn]{1,}/isU"," 
rn",$txt); 
return $txt; 
} 
?> 

//相對路徑轉(zhuǎn)化成絕對路徑

復(fù)制代碼代碼如下:

 
<? 
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("http://.*/", "", $server_url); 
if ($server_url == '') { 
return $content; 
} 
if (isset($protocol[0])) { 
$new_content = preg_replace('/href="http://', 'href="'.$protocol[0].$server_url.'/', $content); 
$new_content = preg_replace('/src="http://', 'src="'.$protocol[0].$server_url.'/', $new_content); 
} else { 
$new_content = $content; 
} 
return $new_content; 
} 
?> 

//取得所有鏈接

復(fù)制代碼代碼如下:

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

//HTML表格的每行轉(zhuǎn)為CSV格式數(shù)組

復(fù)制代碼代碼如下:

 
<? 
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 標(biāo)記 
$table = preg_replace("'<[/!]*?[^<>]*?>'si","",$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; 
} 
?> 

//將HTML表格的每行每列轉(zhuǎn)為數(shù)組，采集表格數(shù)據(jù)

復(fù)制代碼代碼如下:

 
<? 
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 標(biāo)記 
$table = preg_replace("'<[/!]*?[^<>]*?>'si","",$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單詞 $distinct=true 去除重復(fù)

復(fù)制代碼代碼如下:

 
<? 
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]; 
} 
?> 

//打印出為本PHP項目做出貢獻的人員的清單

復(fù)制代碼代碼如下: