php一些基本函数
Posted 行走江湖的码农
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<?php
// 函数加密解密
function encryptDecrypt($key, $string, $decrypt)
if($decrypt)
$decrypted = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode($string), MCRYPT_MODE_CBC, md5(md5($key))), "12");
return $decrypted;
else
$encrypted = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $string, MCRYPT_MODE_CBC, md5(md5($key))));
return $encrypted;
//以下是将字符串“Helloweba欢迎您”分别加密和解密
//加密：
echo encryptDecrypt('password', 'Helloweba欢迎您',0);
//解密：
echo "<br/>";
echo encryptDecrypt('password', 'z0JAx4qMwcF+db5TNbp/xwdUM84snRsXvvpXuaCa4Bk=',1);
echo "<br/>";
// 指定长度随机数
function generateRandomString($length = 10)
$characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
$randomString = '';
for ($i = 0; $i < $length; $i++)
$randomString .= $characters[rand(0, strlen($characters) - 1)];
return $randomString;
echo generateRandomString(5);
echo "<br/>";
// 获取文件扩展名
function getExtension($filename)
$myext = substr($filename, strrpos($filename, '.'));
return str_replace('.','',$myext);
$filename = '我的文档.doc';
echo getExtension($filename);
echo "<br/>";
// 获取文件大小
function formatSize($size)
$sizes = array(" Bytes", " KB", " MB", " GB", " TB", " PB", " EB", " ZB", " YB");
if ($size == 0)
return('n/a');
else
return (round($size/pow(1024, ($i = floor(log($size, 1024)))), 2) . $sizes[$i]);
echo formatSize(12350006);
echo "<br/>";
// 替换标签
function stringParser($string,$replacer)
$result = str_replace(array_keys($replacer), array_values($replacer),$string);
return $result;
$string = 'The banchor text/b is the bactual word/b or words used brto describe the link britself';
$replace_array = array('b' => '<b>','/b' => '</b>','br' => '<br />');
echo "替换后：".stringParser($string,$replace_array);
echo "<br/>";
// 目录下文件
function listDirFiles($DirPath)
if($dir = opendir($DirPath))
while(($file = readdir($dir))!== false)
if(!is_dir($DirPath.$file))
echo "filename: $file<br />";
listDirFiles('D:/');
echo "<br/>";
// PHP获取当前页面URL
function curPageURL()
$pageURL = 'http';
if (!empty($_SERVER['HTTPS'])) $pageURL .= "s";
$pageURL .= "://";
if ($_SERVER["SERVER_PORT"] != "80")
$pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
else
$pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
return $pageURL;
echo curPageURL();
// 强制下载
function download($filename)
if ((isset($filename))&&(file_exists($filename)))
header("Content-length: ".filesize($filename));
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="' . $filename . '"');
readfile("$filename");
else
echo "Looks like file does not exist!";
// download("D:/key.txt");
//获取用户真实IP
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);
echo "<br/>";
echo getIp();
echo "<br/>";
function message($msgTitle,$message,$jumpUrl)
$str = '<!DOCTYPE html>';
$str .= '<html>';
$str .= '<head>';
$str .= '<meta charset="utf-8">';
$str .= '<title>页面提示</title>';
$str .= '<style type="text/css">';
$str .= '*margin:0; padding:0acolor:#369; text-decoration:none;a:hovertext-decoration:underlinebodyheight:100%; font:12px/18px Tahoma, Arial, sans-serif; color:#424242; background:#fff.messagewidth:450px; height:120px; margin:16% auto; border:1px solid #99b1c4; background:#ecf7fb.message h3height:28px; line-height:28px; background:#2c91c6; text-align:center; color:#fff; font-size:14px.msg_txtpadding:10px; margin-top:8px.msg_txt h4line-height:26px; font-size:14px.msg_txt h4.redcolor:#f30.msg_txt pline-height:22px';
$str .= '</style>';
$str .= '</head>';
$str .= '<body>';
$str .= '<div class="message">';
$str .= '<h3>'.$msgTitle.'</h3>';
$str .= '<div class="msg_txt">';
$str .= '<h4 class="red">'.$message.'</h4>';
$str .= '<p>系统将在 <span style="color:blue;font-weight:bold">3</span> 秒后自动跳转,如果不想等待,直接点击 <a href="$jumpUrl">这里</a> 跳转</p>';
$str .= "<script>setTimeout('location.replace('".$jumpUrl."')',2000)</script>";
$str .= '</div>';
$str .= '</div>';
$str .= '</body>';
$str .= '</html>';
echo $str;
// message('操作提示','操作成功！','http://www.baidu.com');
function getClientIp()
$ip = NULL;
if (isset($_SERVER['HTTP_X_FORWARDED_FOR']))
$arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
$pos = array_search('unknown',$arr);
if(false !== $pos) unset($arr[$pos]);
$ip = trim($arr[0]);
elseif (isset($_SERVER['HTTP_CLIENT_IP']))
$ip = $_SERVER['HTTP_CLIENT_IP'];
elseif (isset($_SERVER['REMOTE_ADDR']))
$ip = $_SERVER['REMOTE_ADDR'];
// IP地址合法验证
$ip = (false !== ip2long($ip)) ? $ip : '0.0.0.0';
return $ip;
/** * 获取在线IP * @return String */
function getOnlineIp($format=0)
global $S_GLOBAL;
if(empty($S_GLOBAL['onlineip']))
if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown'))
$onlineip = getenv('HTTP_CLIENT_IP');
elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown'))
$onlineip = getenv('HTTP_X_FORWARDED_FOR');
elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown'))
$onlineip = getenv('REMOTE_ADDR');
elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown'))
$onlineip = $_SERVER['REMOTE_ADDR'];
preg_match("/[\\d\\.]7,15/", $onlineip, $onlineipmatches);
$S_GLOBAL['onlineip'] = $onlineipmatches[0] ? $onlineipmatches[0] : 'unknown';
if($format)
$ips = explode('.', $S_GLOBAL['onlineip']);
for($i=0;$i<3;$i++)
$ips[$i] = intval($ips[$i]);
return sprintf('%03d%03d%03d', $ips[0], $ips[1], $ips[2]);
else
return $S_GLOBAL['onlineip'];
/** * 获取url * @return [type] [description] */
function getUrl()
$pageURL = 'http';
if (isset($_SERVER["HTTPS"]) && $_SERVER["HTTPS"] == "on")
$pageURL .= "s";
$pageURL .= "://";
if ($_SERVER["SERVER_PORT"] != "80")
$pageURL .= $_SERVER["HTTP_HOST"] . ":" . $_SERVER["SERVER_PORT"] . $_SERVER["REQUEST_URI"];
else
$pageURL .= $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"];
return $pageURL;
/** * 获取当前站点的访问路径根目录 * @return [type] [description] */
function getSiteUrl()
$uri = $_SERVER['REQUEST_URI']?$_SERVER['REQUEST_URI']:($_SERVER['PHP_SELF']?$_SERVER['PHP_SELF']:$_SERVER['SCRIPT_NAME']);
return 'http://'.$_SERVER['HTTP_HOST'].substr($uri, 0, strrpos($uri, '/')+1);
/** * 字符串截取，支持中文和其他编码 * @param [string] $str [字符串] * @param integer $start [起始位置] * @param integer $length [截取长度] * @param string $charset [字符串编码] * @param boolean $suffix [是否有省略号] * @return [type] [description] */
function msubstr($str, $start=0, $length=15, $charset="utf-8", $suffix=true)
if(function_exists("mb_substr"))
return mb_substr($str, $start, $length, $charset);
elseif(function_exists('iconv_substr'))
return iconv_substr($str,$start,$length,$charset);
$re['utf-8'] = "/[\\x01-\\x7f]|[\\xc2-\\xdf][\\x80-\\xbf]|[\\xe0-\\xef][\\x80-\\xbf]2|[\\xf0-\\xff][\\x80-\\xbf]3/";
$re['gb2312'] = "/[\\x01-\\x7f]|[\\xb0-\\xf7][\\xa0-\\xfe]/";
$re['gbk'] = "/[\\x01-\\x7f]|[\\x81-\\xfe][\\x40-\\xfe]/";
$re['big5'] = "/[\\x01-\\x7f]|[\\x81-\\xfe]([\\x40-\\x7e]|\\xa1-\\xfe])/";
preg_match_all($re[$charset], $str, $match);
$slice = join("",array_slice($match[0], $start, $length));
if($suffix)
return $slice."…";
return $slice;
/** * php 实现js escape 函数 * @param [type] $string [description] * @param string $encoding [description] * @return [type] [description] */
function escape($string, $encoding = 'UTF-8')
$return = null;
for ($x = 0; $x < mb_strlen($string, $encoding);$x ++)
$str = mb_substr($string, $x, 1, $encoding);
if (strlen($str) > 1) // 多字节字符
$return .= "%u" . strtoupper(bin2hex(mb_convert_encoding($str, 'UCS-2', $encoding)));
else
$return .= "%" . strtoupper(bin2hex($str));
return $return;
/** * php 实现 js unescape函数 * @param [type] $str [description] * @return [type] [description] */
function unescape($str)
$str = rawurldecode($str);
preg_match_all("/(?:%u.4)|.4;|&#\\d+;|.+/U",$str,$r);
$ar = $r[0];
foreach($ar as $k=>$v)
if(substr($v,0,2) == "%u")
$ar[$k] = iconv("UCS-2","utf-8//IGNORE",pack("H4",substr($v,-4)));
elseif(substr($v,0,3) == "")
$ar[$k] = iconv("UCS-2","utf-8",pack("H4",substr($v,3,-1)));
elseif(substr($v,0,2) == "&#")
echo substr($v,2,-1)."";
$ar[$k] = iconv("UCS-2","utf-8",pack("n",substr($v,2,-1)));
return join("",$ar);
/** * 数字转人名币 * @param [type] $num [description] * @return [type] [description] */
function num2rmb ($num)
$c1 = "零壹贰叁肆伍陆柒捌玖";
$c2 = "分角元拾佰仟万拾佰仟亿";
$num = round($num, 2);
$num = $num * 100;
if (strlen($num) > 10)
return "oh,sorry,the number is too long!";
$i = 0;
$c = "";
while (1)
if ($i == 0)
$n = substr($num, strlen($num)-1, 1);
else
$n = $num % 10;
$p1 = substr($c1, 3 * $n, 3);
$p2 = substr($c2, 3 * $i, 3);
if ($n != '0' || ($n == '0' && ($p2 == '亿' || $p2 == '万' || $p2 == '元')))
$c = $p1 . $p2 . $c;
else
$c = $p1 . $c;
$i = $i + 1;
$num = $num / 10;
$num = (int)$num;
if ($num == 0)
break;
$j = 0;
$slen = strlen($c);
while ($j < $slen)
$m = substr($c, $j, 6);
if ($m == '零元' || $m == '零万' || $m == '零亿' || $m == '零零')
$left = substr($c, 0, $j);
$right = substr($c, $j + 3);
$c = $left . $right;
$j = $j-3;
$slen = $slen-3;
$j = $j + 3;
if (substr($c, strlen($c)-3, 3) == '零')
$c = substr($c, 0, strlen($c)-3);
// if there is a '0' on the end , chop it out
return $c . "整";
/** * 特殊的字符 * @param [type] $str [description] * @return [type] [description] */
function makeSemiangle($str)
$arr = array( '０' => '0', '１' => '1', '２' => '2', '３' => '3', '４' => '4', '５' => '5', '６' => '6', '７' => '7', '８' => '8', '９' => '9', 'Ａ' => 'A', 'Ｂ' => 'B', 'Ｃ' => 'C', 'Ｄ' => 'D', 'Ｅ' => 'E', 'Ｆ' => 'F', 'Ｇ' => 'G', 'Ｈ' => 'H', 'Ｉ' => 'I', 'Ｊ' => 'J', 'Ｋ' => 'K', 'Ｌ' => 'L', 'Ｍ' => 'M', 'Ｎ' => 'N', 'Ｏ' => 'O', 'Ｐ' => 'P', 'Ｑ' => 'Q', 'Ｒ' => 'R', 'Ｓ' => 'S', 'Ｔ' => 'T', 'Ｕ' => 'U', 'Ｖ' => 'V', 'Ｗ' => 'W', 'Ｘ' => 'X', 'Ｙ' => 'Y', 'Ｚ' => 'Z', 'ａ' => 'a', 'ｂ' => 'b', 'ｃ' => 'c', 'ｄ' => 'd', 'ｅ' => 'e', 'ｆ' => 'f', 'ｇ' => 'g', 'ｈ' => 'h', 'ｉ' => 'i', 'ｊ' => 'j', 'ｋ' => 'k', 'ｌ' => 'l', 'ｍ' => 'm', 'ｎ' => 'n', 'ｏ' => 'o', 'ｐ' => 'p', 'ｑ' => 'q', 'ｒ' => 'r', 'ｓ' => 's', 'ｔ' => 't', 'ｕ' => 'u', 'ｖ' => 'v', 'ｗ' => 'w', 'ｘ' => 'x', 'ｙ' => 'y', 'ｚ' => 'z', '（' => '(', '）' => ')', '〔' => '[', '〕' => ']', '【' => '[', '】' => ']', '〖' => '[', '〗' => ']', '｛' => '', '｝' => '', '《' => '<', '》' => '>', '％' => '%', '＋' => '+', '—' => '-', '－' => '-', '～' => '-', '：' => ':', '。' => '.', '、' => ',', '，' => '.', '、' => '.', '；' => ';', '？' => '?', '！' => '!', '…' => '-', '‖' => '|', '”' => '"', '“' => '"', '' => '`', '‘' => '`', '｜' => '|', '〃' => '"', ' ' => ' ','．' => '.');
return strtr($str, $arr);
/** * 下载 * @param [type] $filename [description] * @param string $dir [description] * @return [type] [description] */
function downloads($filename,$dir='./')
$filepath = $dir.$filename;
if (!file_exists($filepath))
header("Content-type: text/html; charset=utf-8");
echo "File not found!";
exit;
else
$file = fopen($filepath,"r");
Header("Content-type: application/octet-stream");
Header("Accept-Ranges: bytes");
Header("Accept-Length: ".filesize($filepath));
Header("Content-Disposition: attachment; filename=".$filename);
echo fread($file, filesize($filepath));
fclose($file);
/** * 创建一个目录树 * @param [type] $dir [description] * @param integer $mode [description] * @return [type] [description] */
function mkdirs($dir, $mode = 0777)
if (!is_dir($dir))
mkdirs(dirname($dir), $mode);
return mkdir($dir, $mode);
return true;
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