|
|
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);
}
/*驗(yàn)證IP地址函數(shù)*/
function checkIP($ip) {
return preg_match((2[0-4]/d|25[0-5]|[01]?/d/d?)/.){3}(2[0-4]/d|25[0-5]|[01]?/d/d?);
}
/*用戶(hù)輸入內(nèi)容過(guò)濾函數(shù)*/
function getStr($str) {
$tmpstr = trim($str);
$tmpstr = strip_tags($tmpstr);
$tmpstr = htmlspecialchars($tmpstr);
/*加入字符轉(zhuǎn)義*/
$tmpstr = addslashes($tmpstr);
return $tmpstr;
}
/*容量大小計(jì)算函數(shù)*/
function sizecount($filesize) {
if($filesize >= 1073741824) {
$filesize = round($filesize / 1073741824 * 100) / 100 . ' G';
} elseif($filesize >= 1048576) {
$filesize = round($filesize / 1048576 * 100) / 100 . ' M';
} elseif($filesize >= 1024) {
$filesize = round($filesize / 1024 * 100) / 100 . ' K';
} else {
$filesize = $filesize . ' bytes';
}
return $filesize;
}
/*簡(jiǎn)單防SQL注入函數(shù)*/
function getSQL($feild) {
$tmpfeild = mysql_escape_string($feild);
return $tmpfeild;
}
/*$num必須為英文字符或數(shù)字0-9*/
function getNums($num) {
return (ctype_alnum($num));
}
/*$char必須為英文字符*/
function getChar($char) {
return (ctype_alpha($char));
}
/*匹配qq(5-12)位*/
function getQQ($qq) {
return preg_match("/^/b[0-9]{5,12}/b/",$qq);
}
/*匹配電子郵件地址*/
function getEmail($email) {
return strlen($email)>6 && preg_match("/^/w+@(/w+/.)+[com]|[cn]$/" , $email);
// preg_match("/^[/w/-/.]+@[/w/-/.]+(/./w+)+$/",$email);
}
/*生成email連接*/
function emailconv($email,$tolink=1) {
$email=str_replace(array('@','.'),array('@','.'),$email);
return $tolink ? '<a href="mailto: '.$email.'">'.$email.'</a>':$email;
}
/*檢查ip是否被允許訪問(wèn)*/
function ipaccess($ip,$accesslist) {
return preg_match("/^(".str_replace(array("/r/n",' '),array('|',''),preg_quote($accesslist,'/')).")/",$ip);
}
/*若標(biāo)題過(guò)長(zhǎng)，此函數(shù)可顯示前幾個(gè)字符，剩余字符用...代替*/
function cutstr($string, $length) {
if(strlen($string) > $length) {
for($i = 0; $i < $length - 3; $i++) {
/*返回字符的序數(shù)值*/
$strcut .= ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
}
return $strcut.' ...';
} else {
return $string;
}
}
php技術(shù)：php一些公用函數(shù)的集合，轉(zhuǎn)載需保留來(lái)源！
鄭重聲明：本文版權(quán)歸原作者所有，轉(zhuǎn)載文章僅為傳播更多信息之目的，如作者信息標(biāo)記有誤，請(qǐng)第一時(shí)間聯(lián)系我們修改或刪除，多謝。
