PHP 常用到的函數

jopen 12年前發布 | 49K 次閱讀 PHP PHP開發 

<?php


//獲得當前的腳本網址
function GetCurUrl()
{
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;
}


//將URL中的某參數設為某值


function url_set_value($url,$key,$value)
{
$a=explode('?',$url);
$url_f=$a[0];
$query=$a[1];
parse_str($query,$arr);
$arr[$key]=$value;
return $url_f.'?'.http_build_query($arr);
}


//獲取IP
function GetIP() {
    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;
}


//時間的增加（還可以改進成時分秒都可以增加，有時間再補上）
function DateAdd($date, $int, $unit = "d") {
    $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'])); //oSPHP.COM.CN
}


//計算出給出的日期是星期幾
function GetWeekDay($date) {
    $dateArr = explode("-", $date);
    return date("w", mktime(0,0,0,$dateArr[1],$dateArr[2],$dateArr[0]));
}


//檢查日期是否合法日期
function check_date($date) {
    $dateArr = explode("-", $date);
    if (is_numeric($dateArr[0]) && is_numeric($dateArr[1]) && is_numeric($dateArr[2])) {
        return checkdate($dateArr[1],$dateArr[2],$dateArr[0]);
    }
    return false;
}


//檢查時間是否合法時間
function check_time($time) {
    $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 && $timeArr[2] <= 59))
            return true;
        else
            return false;
    }
    return false;
}
//時間比較函數，返回兩個日期相差幾秒、幾分鐘、幾小時或幾天
function DateDiff($date1, $date2, $unit = "") {
    switch ($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 && $time2) //OSPHP.com.CN
        return (float)($time1 - $time2) / $dividend;
    return false;
}
//獲取訪問者瀏覽器
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))
{
$temp =explode("(", $Agent); $Part=$temp[1];
$temp =explode(")", $Part); $browserver=$temp[1];
$temp =explode(" ",$browserver);$browserver=$temp[2];
$browserver =preg_replace("/([d.]+)/","1",$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];
$browserver =preg_replace("/([d.]+)/","1",$browserver);
$browserver = " $browserver";
$browser = "Internet Explorer";
}
if ($browser!="")
{
$browseinfo = "$browser$browserver";
}
else{
$browseinfo = "Unknown";
}
return $browseinfo;
}
//調用方法$browser=browseinfo() ;直接返回結果


//獲取訪問者操作系統
function osinfo() {
$os="";
$Agent = $GLOBALS["HTTP_USER_AGENT"];
if (eregi('win',$Agent) && strpos($Agent, '95')) {
$os="Windows 95";
}
elseif (eregi('win 9x',$Agent) && strpos($Agent, '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) && eregi('os',$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 $os;
}
//調用方法$os=os_infor() ;


//頁面快速轉向
function turntopage($url="index.php",$info = "頁面轉向中...",$second=2){
print "<html>n<head>n<title>頁面轉向中....</title>n";
print "<meta http-equiv="refresh" content="$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,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;
}


/**


    

  • 返回經addslashes處理過的字符串或數組
    • 

  • @param $string 需要處理的字符串或數組
    • 

  • @return mixed
*/
function new_addslashes($string){
if(!is_array($string)) return addslashes($string);
foreach($string as $key => $val) $string[$key] = new_addslashes($val);
return $string;
}
    • 



/**


    

  • 返回經stripslashes處理過的字符串或數組
    • 

  • @param $string 需要處理的字符串或數組
    • 

  • @return mixed
*/
function new_stripslashes($string) {
if(!is_array($string)) return stripslashes($string);
foreach($string as $key => $val) $string[$key] = new_stripslashes($val);
return $string;
}
    • 



/**


    

  • 返回經addslashe處理過的字符串或數組
    • 

  • @param $obj 需要處理的字符串或數組
    • 

  • @return mixed
*/
function new_html_special_chars($string) {
if(!is_array($string)) return htmlspecialchars($string);
foreach($string as $key => $val) $string[$key] = new_html_special_chars($val);
return $string;
}
/**
    • 

  • 安全過濾函數
*
    • 

  • @param $string
    • 

  • @return string
/
function safe_replace($string) {
$string = str_replace('%20','',$string);
$string = str_replace('%27','',$string);
$string = str_replace('%2527','',$string);
$string = str_replace('','',$string);
$string = str_replace('"','&quot;',$string);
$string = str_replace("'",'',$string);
$string = str_replace('"','',$string);
$string = str_replace(';','',$string);
$string = str_replace('<','&lt;',$string);
$string = str_replace('>','&gt;',$string);
$string = str_replace("{",'',$string);
$string = str_replace('}','',$string);
return $string;
}
    • 



/**


    

  • 過濾ASCII碼從0-28的控制字符
    • 

  • @return String
/
function trim_unsafe_control_chars($str) {
$rule = '/[' . chr ( 1 ) . '-' . chr ( 8 ) . chr ( 11 ) . '-' . chr ( 12 ) . chr ( 14 ) . '-' . chr ( 31 ) . ']/';
return str_replace ( chr ( 0 ), '', preg_replace ( $rule, '', $str ) );
}
    • 



/**


    

  • 格式化文本域內容
*
    • 

  • @param $string 文本域內容
    • 

  • @return string
*/
function trim_textarea($string) {
$string = nl2br ( str_replace ( ' ', '&nbsp;', $string ) );
return $string;
}
    • 



/**


    

  • 將文本格式成適合js輸出的字符串
    • 

  • @param string $string 需要處理的字符串
    • 

  • @param intval $isjs 是否執行字符串格式化，默認為執行
    • 

  • @return string 處理后的字符串
*/
function format_js($string, $isjs = 1){
$string = addslashes(str_replace(array("\r", "\n"), array('', ''), $string));
return $isjs ? 'document.write("'.$string.'");' : $string;
}
    • 



/**


    

  • 轉義 javascript 代碼標記
*
    • 

  • @param $str
    • 

  • @return mixed
/
function trim_script($str) {
$str = preg_replace ( '/\<([\/]?)script([^\>]?)\>/si', '&lt;\1script\2&gt;', $str );
$str = preg_replace ( '/\<([\/]?)iframe([^\>]?)\>/si', '&lt;\1iframe\2&gt;', $str );
$str = preg_replace ( '/\<([\/]?)frame([^\>]?)\>/si', '&lt;\1frame\2&gt;', $str );
$str = preg_replace ( '/]]\>/si', ']] >', $str );
return $str;
}
    • 



/**


    

  • 字符截取 支持UTF8/GBK
    • 

  • @param $string
    • 

  • @param $length
    • 

  • @param $dot
*/
function str_cut($string, $length, $dot = '...') {
$strlen = strlen($string);
if($strlen <= $length) return $string;
$string = str_replace(array(' ','&nbsp;', '&amp;', '&quot;', '&#039;', '&ldquo;', '&rdquo;', '&mdash;', '&lt;', '&gt;', '&middot;', '&hellip;'), array('∵',' ', '&', '"', "'", '“', '”', '—', '<', '>', '·', '…'), $string);
$strcut = '';
if(strtolower(CHARSET) == 'utf-8') {
$length = intval($length-strlen($dot)-$length/3);
$n = $tn = $noc = 0;
while($n < strlen($string)) {
$t = ord($string[$n]);
if($t == 9 || $t == 10 || (32 <= $t && $t <= 126)) {
$tn = 1; $n++; $noc++;
} elseif(194 <= $t && $t <= 223) {
$tn = 2; $n += 2; $noc += 2;
} elseif(224 <= $t && $t <= 239) {
$tn = 3; $n += 3; $noc += 2;
} elseif(240 <= $t && $t <= 247) {
$tn = 4; $n += 4; $noc += 2;
} elseif(248 <= $t && $t <= 251) {
$tn = 5; $n += 5; $noc += 2;
} elseif($t == 252 || $t == 253) {
$tn = 6; $n += 6; $noc += 2;
} else {
$n++;
}
if($noc >= $length) {
break;
}
}
if($noc > $length) {
$n -= $tn;
}
$strcut = substr($string, 0, $n);
$strcut = str_replace(array('∵', '&', '"', "'", '“', '”', '—', '<', '>', '·', '…'), array(' ', '&amp;', '&quot;', '&#039;', '&ldquo;', '&rdquo;', '&mdash;', '&lt;', '&gt;', '&middot;', '&hellip;'), $strcut);
}
else {
$dotlen = strlen($dot);
$maxi = $length - $dotlen - 1;
$current_str = '';
$search_arr = array('&',' ', '"', "'", '“', '”', '—', '<', '>', '·', '…','∵');
$replace_arr = array('&amp;','&nbsp;', '&quot;', '&#039;', '&ldquo;', '&rdquo;', '&mdash;', '&lt;', '&gt;', '&middot;', '&hellip;',' ');
$search_flip = array_flip($search_arr);
for ($i = 0; $i < $maxi; $i++) {
$current_str = ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
if (in_array($current_str, $search_arr)) {
$key = $search_flip[$current_str];
$current_str = str_replace($search_arr[$key], $replace_arr[$key], $current_str);
}
$strcut .= $current_str;
}
}
return $strcut.$dot;
}
    • 



/**


    

  • 獲取請求ip
*
    • 

  • @return ip地址
*/
function ip() {
if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) {
$ip = getenv('HTTP_CLIENT_IP');
} elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) {
$ip = getenv('HTTP_X_FORWARDED_FOR');
} elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) {
$ip = getenv('REMOTE_ADDR');
} elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')) {
$ip = $_SERVER['REMOTE_ADDR'];
}
return preg_match ( '/[\d.]{7,15}/', $ip, $matches ) ? $matches [0] : '';
}
    • 



/**


    

  • 程序執行時間
*
    • 

  • @returnint單位ms
*/
function execute_time() {
$stime = explode ( ' ', SYS_START_TIME );
$etime = explode ( ' ', microtime () );
return number_format ( ($etime [1] + $etime [0] - $stime [1] - $stime [0]), 6 );
}
    • 



/**


    

  • 產生隨機字符串
*
    • 

  • @param    int        $length  輸出長度
    • 

  • @param    string     $chars   可選的 ，默認為 0123456789
    • 

  • @return   string     字符串
*/
function random($length, $chars = '0123456789') {
$hash = '';
$max = strlen($chars) - 1;
for($i = 0; $i < $length; $i++) {
$hash .= $chars[mt_rand(0, $max)];
}
return $hash;
}
    • 



/**


    

  • 將字符串轉換為數組
*
    • 

  • @paramstring$data字符串
    • 

  • @returnarray返回數組格式，如果，data為空，則返回空數組
*/
function string2array($data) {
if($data == '') return array();
eval("\$array = $data;");
return $array;
}
/**
    • 

  • 將數組轉換為字符串
*
    • 

  • @paramarray$data數組
    • 

  • @parambool$isformdata如果為0，則不使用new_stripslashes處理，可選參數，默認為1
    • 

  • @returnstring返回字符串，如果，data為空，則返回空
*/
function array2string($data, $isformdata = 1) {
if($data == '') return '';
if($isformdata) $data = new_stripslashes($data);
return addslashes(var_export($data, TRUE));
}
    • 



/**


    

  • 轉換字節數為其他單位

    • 

  • @paramstring$filesize字節大小
    • 

  • @returnstring返回大小
/
function sizecount($filesize) {
if ($filesize >= 1073741824) {
$filesize = round($filesize / 1073741824  100) / 100 .' GB';
} elseif ($filesize >= 1048576) {
$filesize = round($filesize / 1048576  100) / 100 .' MB';
} elseif($filesize >= 1024) {
$filesize = round($filesize / 1024  100) / 100 . ' KB';
} else {
$filesize = $filesize.' Bytes';
}
return $filesize;
}
    • 



/**


    

  • 查詢字符是否存在于某字符串
*
    • 

  • @param $haystack 字符串
    • 

  • @param $needle 要查找的字符
    • 

  • @return bool
*/
function str_exists($haystack, $needle)
{
return !(strpos($haystack, $needle) === FALSE);
}
    • 



/**


    

  • 取得文件擴展
*
    • 

  • @param $filename 文件名
    • 

  • @return 擴展名
*/
function fileext($filename) {
return strtolower(trim(substr(strrchr($filename, '.'), 1, 10)));
}
    • 



/**


    

  • 生成sql語句，如果傳入$in_cloumn 生成格式為 IN('a', 'b', 'c')
    • 

  • @param $data 條件數組或者字符串
    • 

  • @param $front 連接符
    • 

  • @param $in_column 字段名稱
    • 

  • @return string
*/
function to_sqls($data, $front = ' AND ', $in_column = false) {
if($in_column && is_array($data)) {
$ids = '\''.implode('\',\'', $data).'\'';
$sql = "$in_column IN ($ids)";
return $sql;
}
else{
if ($front == '') {
$front = ' AND ';
}
if(is_array($data) && count($data) > 0) {
$sql = '';
foreach ($data as $key => $val) {
$sql .= $sql ? " $front $key = '$val' " : " $key = '$val' ";
}
return $sql;
}
else{
return $data;
}
}
}
    • 



/**


    

  • 判斷email格式是否正確
    • 

  • @param $email
*/
function is_email($email) {
return strlen($email) > 6 && preg_match("/^[\w-.]+@[\w-.]+(.\w+)+$/", $email);
}
    • 



/**


    

  • 文件下載
    • 

  • @param $filepath 文件路徑
    • 

  • @param $filename 文件名稱
*/
    • 



function file_down($filepath, $filename = '') {
if(!$filename) $filename = basename($filepath);
if(is_ie()) $filename = rawurlencode($filename);
$filetype = fileext($filename);
$filesize = sprintf("%u", filesize($filepath));
if(ob_get_length() !== false) @ob_end_clean();
header('Pragma: public');
header('Last-Modified: '.gmdate('D, d M Y H:i:s') . ' GMT');
header('Cache-Control: no-store, no-cache, must-revalidate');
header('Cache-Control: pre-check=0, post-check=0, max-age=0');
header('Content-Transfer-Encoding: binary');
header('Content-Encoding: none');
header('Content-type: '.$filetype);
header('Content-Disposition: attachment; filename="'.$filename.'"');
header('Content-length: '.$filesize);
readfile($filepath);
exit;
}


/**


    

  • 判斷字符串是否為utf8編碼，英文和半角字符返回ture
    • 

  • @param $string
    • 

  • @return bool
/
function is_utf8($string) {
return preg_match('%^(?:
[\x09\x0A\x0D\x20-\x7E] # ASCII
| [\xC2-\xDF][\x80-\xBF] # non-overlong 2-byte
| \xE0[\xA0-\xBF][\x80-\xBF] # excluding overlongs
| [\xE1-\xEC\xEE\xEF][\x80-\xBF]{2} # straight 3-byte
| \xED[\x80-\x9F][\x80-\xBF] # excluding surrogates
| \xF0[\x90-\xBF][\x80-\xBF]{2} # planes 1-3
| [\xF1-\xF3][\x80-\xBF]{3} # planes 4-15
| \xF4[\x80-\x8F][\x80-\xBF]{2} # plane 16
)$%xs', $string);
}
    • 



/**


    

  • 對用戶的密碼進行加密
    • 

  • @param $password
    • 

  • @param $encrypt //傳入加密串，在修改密碼時做認證
    • 

  • @return array/password
*/
function password($password, $encrypt='') {
$pwd = array();
$pwd['encrypt'] =  $encrypt ? $encrypt : create_randomstr();
$pwd['password'] = md5(md5(trim($password)).$pwd['encrypt']);
return $encrypt ? $pwd['password'] : $pwd;
}
    • 



/**


    

  • 生成隨機字符串
    • 

  • @param string $lenth 長度
    • 

  • @return string 字符串
*/
function create_randomstr($lenth = 6) {
return random($lenth, '123456789abcdefghijklmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVWXYZ');
}
    • 



/**


    

  • 檢查密碼長度是否符合規定
*
    • 

  • @param STRING $password
    • 

  • @return TRUE or FALSE
*/
function is_password($password) {
$strlen = strlen($password);
if($strlen >= 6 && $strlen <= 20) return true;
return false;
}
    • 



/**


    

  • 檢測輸入中是否含有錯誤字符
*
    • 

  • @param char $string 要檢查的字符串名稱
    • 

  • @return TRUE or FALSE
/
function is_badword($string) {
$badwords = array("\",'&',' ',"'",'"','/','',',','<','>',"\r","\t","\n","#");
foreach($badwords as $value){
if(strpos($string, $value) !== FALSE) {
return TRUE;
}
}
return FALSE;
}
    • 



/**


    

  • 檢查用戶名是否符合規定
*
    • 

  • @param STRING $username 要檢查的用戶名
    • 

  • @return TRUE or FALSE
*/
function is_username($username) {
$strlen = strlen($username);
if(is_badword($username) || !pregmatch("/^[a-zA-Z0-9\x7f-\xff][a-zA-Z0-9_\x7f-\xff]+$/", $username)){
return false;
} elseif ( 20 <= $strlen || $strlen < 2 ) {
return false;
}
return true;
}
    • 



/**


    

  • 檢查id是否存在于數組中
*
    • 

  • @param $id
    • 

  • @param $ids
    • 

  • @param $s
*/
function check_in($id, $ids = '', $s = ',') {
if(!$ids) return false;
$ids = explode($s, $ids);
return is_array($id) ? array_intersect($id, $ids) : in_array($id, $ids);
}
    • 



/**


    

  • 對數據進行編碼轉換
    • 

  • @param array/string $data       數組
    • 

  • @param string $input     需要轉換的編碼
    • 

  • @param string $output    轉換后的編碼
*/
function array_iconv($data, $input = 'gbk', $output = 'utf-8') {
if (!is_array($data)) {
return iconv($input, $output, $data);
} 
else {
foreach ($data as $key=>$val) {
if(is_array($val)) {
$data[$key] = array_iconv($val, $input, $output);
} else {
$data[$key] = iconv($input, $output, $val);
}
}
return $data;
}
}
    • 



?> </pre>
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