自己项目中PHP常用工具类大全分享 - 第八号当铺-php手册-php.cn

Php代码

/**
* 助手类
* @author www.shouce.ren
*
*/
class Helper
{
/**
* 判断当前服务器系统
* @return string
*/
public static function getOS(){
if(PATH_SEPARATOR == ':'){
return 'Linux';
}else{
return 'Windows';
}
}
/**
* 当前微妙数
* @return number
*/
public static function microtime_float() {
list ( $usec, $sec ) = explode ( " ", microtime () );
return (( float ) $usec + ( float ) $sec);
}
/**
* 切割utf-8格式的字符串(一个汉字或者字符占一个字节)
*
* @author zhao jinhan
* @version v1.0.0
*
*/
public static function truncate_utf8_string($string, $length, $etc = '...') {
$result = '';
$string = html_entity_decode ( trim ( strip_tags ( $string ) ), ENT_QUOTES, 'UTF-8' );
$strlen = strlen ( $string );
for($i = 0; (($i $strlen) && ($length > 0)); $i ++) {
if ($number = strpos ( str_pad ( decbin ( ord ( substr ( $string, $i, 1 ) ) ), 8, '0', STR_PAD_LEFT ), '0' )) {
if ($length
break;
}
$result .= substr ( $string, $i, $number );
$length -= 1.0;
$i += $number - 1;
} else {
$result .= substr ( $string, $i, 1 );
$length -= 0.5;
}
}
$result = htmlspecialchars ( $result, ENT_QUOTES, 'UTF-8' );
if ($i $strlen) {
$result .= $etc;
}
return $result;
}
/**
* 遍历文件夹
* @param string $dir
* @param boolean $all true表示递归遍历
* @return array
*/
public static function scanfDir($dir='', $all = false, &$ret = array()){
if ( false !== ($handle = opendir ( $dir ))) {
while ( false !== ($file = readdir ( $handle )) ) {
if (!in_array($file, array('.', '..', '.git', '.gitignore', '.svn', '.htaccess', '.buildpath','.project'))) {
$cur_path = $dir . '/' . $file;
if (is_dir ( $cur_path )) {
$ret['dirs'][] =$cur_path;
$all && self::scanfDir( $cur_path, $all, $ret);
} else {
$ret ['files'] [] = $cur_path;
}
}
}
closedir ( $handle );
}
return $ret;
}
/**
* 邮件发送
* @param string $toemail
* @param string $subject
* @param string $message
* @return boolean
*/
public static function sendMail($toemail = '', $subject = '', $message = '') {
$mailer = Yii::createComponent ( 'application.extensions.mailer.EMailer' );
//邮件配置
$mailer->SetLanguage('zh_cn');
$mailer->Host = Yii::app()->params['emailHost']; //发送邮件服务器
$mailer->Port = Yii::app()->params['emailPort']; //邮件端口
$mailer->Timeout = Yii::app()->params['emailTimeout'];//邮件发送超时时间
$mailer->ContentType = 'text/html';//设置html格式
$mailer->SMTPAuth = true;
$mailer->Username = Yii::app()->params['emailUserName'];
$mailer->Password = Yii::app()->params['emailPassword'];
$mailer->IsSMTP ();
$mailer->From = $mailer->Username; // 发件人邮箱
$mailer->FromName = Yii::app()->params['emailFormName']; // 发件人姓名
$mailer->AddReplyTo ( $mailer->Username );
$mailer->CharSet = 'UTF-8';
// 添加邮件日志
$modelMail = new MailLog ();
$modelMail->accept = $toemail;
$modelMail->subject = $subject;
$modelMail->message = $message;
$modelMail->send_status = 'waiting';
$modelMail->save ();
// 发送邮件
$mailer->AddAddress ( $toemail );
$mailer->Subject = $subject;
$mailer->Body = $message;
if ($mailer->Send () === true) {
$modelMail->times = $modelMail->times + 1;
$modelMail->send_status = 'success';
$modelMail->save ();
return true;
} else {
$error = $mailer->ErrorInfo;
$modelMail->times = $modelMail->times + 1;
$modelMail->send_status = 'failed';
$modelMail->error = $error;
$modelMail->save ();
return false;
}
}
/**
* 判断字符串是utf-8 还是gb2312
* @param unknown $str
* @param string $default
* @return string
*/
public static function utf8_gb2312($str, $default = 'gb2312')
{
$str = preg_replace("/[\x01-\x7F]+/", "", $str);
if (emptyempty($str)) return $default;
$preg = array(
"gb2312" => "/^([\xA1-\xF7][\xA0-\xFE])+$/", //正则判断是否是gb2312
"utf-8" => "/^[\x{4E00}-\x{9FA5}]+$/u", //正则判断是否是汉字(utf8编码的条件了)，这个范围实际上已经包含了繁体中文字了
);
if ($default == 'gb2312') {
$option = 'utf-8';
} else {
$option = 'gb2312';
}
if (!preg_match($preg[$default], $str)) {
return $option;
}
$str = @iconv($default, $option, $str);
//不能转成 $option, 说明原来的不是 $default
if (emptyempty($str)) {
return $option;
}
return $default;
}
/**
* utf-8和gb2312自动转化
* @param unknown $string
* @param string $outEncoding
* @return unknown|string
*/
public static function safeEncoding($string,$outEncoding = 'UTF-8')
{
$encoding = "UTF-8";
for($i = 0; $i strlen ( $string ); $i ++) {
if (ord ( $string {$i} )
continue;
if ((ord ( $string {$i} ) & 224) == 224) {
// 第一个字节判断通过
$char = $string {++ $i};
if ((ord ( $char ) & 128) == 128) {
// 第二个字节判断通过
$char = $string {++ $i};
if ((ord ( $char ) & 128) == 128) {
$encoding = "UTF-8";
break;
}
}
}
if ((ord ( $string {$i} ) & 192) == 192) {
// 第一个字节判断通过
$char = $string {++ $i};
if ((ord ( $char ) & 128) == 128) {
// 第二个字节判断通过
$encoding = "GB2312";
break;
}
}
}
if (strtoupper ( $encoding ) == strtoupper ( $outEncoding ))
return $string;
else
return @iconv ( $encoding, $outEncoding, $string );
}
/**
* 返回二维数组中某个键名的所有值
* @param input $array
* @param string $key
* @return array
*/
public static function array_key_values($array =array(), $key='')
{
$ret = array();
foreach((array)$array as $k=>$v){
$ret[$k] = $v[$key];
}
return $ret;
}
/**
* 判断文件/目录是否可写（取代系统自带的 is_writeable 函数）
* @param string $file 文件/目录
* @return boolean
*/
public static function is_writeable($file) {
if (is_dir($file)){
$dir = $file;
if ($fp = @fopen("$dir/test.txt", 'w')) {
@fclose($fp);
@unlink("$dir/test.txt");
$writeable = 1;
} else {
$writeable = 0;
}
} else {
if ($fp = @fopen($file, 'a+')) {
@fclose($fp);
$writeable = 1;
} else {
$writeable = 0;
}
}
return $writeable;
}
/**
* 格式化单位
*/
static public function byteFormat( $size, $dec = 2 ) {
$a = array ( "B" , "KB" , "MB" , "GB" , "TB" , "PB" );
$pos = 0;
while ( $size >= 1024 ) {
$size /= 1024;
$pos ++;
}
return round( $size, $dec ) . " " . $a[$pos];
}
/**
* 下拉框，单选按钮自动选择
*
* @param $string 输入字符
* @param $param 条件
* @param $type 类型
* selected checked
* @return string
*/
static public function selected( $string, $param = 1, $type = 'select' ) {
$true = false;
if ( is_array( $param ) ) {
$true = in_array( $string, $param );
}elseif ( $string == $param ) {
$true = true;
}
$return='';
if ( $true )
$return = $type == 'select' ? 'selected="selected"' : 'checked="checked"';
echo $return;
}
/**
* 下载远程图片
* @param string $url 图片的绝对url
* @param string $filepath 文件的完整路径（例如/www/images/test），此函数会自动根据图片url和http头信息确定图片的后缀名
* @param string $filename 要保存的文件名(不含扩展名)
* @return mixed 下载成功返回一个描述图片信息的数组，下载失败则返回false
*/
static public function downloadImage($url, $filepath, $filename) {
//服务器返回的头信息
$responseHeaders = array();
//原始图片名
$originalfilename = '';
//图片的后缀名
$ext = '';
$ch = curl_init($url);
//设置curl_exec返回的值包含Http头
curl_setopt($ch, CURLOPT_HEADER, 1);
//设置curl_exec返回的值包含Http内容
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
//设置抓取跳转（http 301，302）后的页面
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
//设置最多的HTTP重定向的数量
curl_setopt($ch, CURLOPT_MAXREDIRS, 3);
//服务器返回的数据（包括http头信息和内容）
$html = curl_exec($ch);
//获取此次抓取的相关信息
$httpinfo = curl_getinfo($ch);
curl_close($ch);
if ($html !== false) {
//分离response的header和body，由于服务器可能使用了302跳转，所以此处需要将字符串分离为 2+跳转次数个子串
$httpArr = explode("\r\n\r\n", $html, 2 + $httpinfo['redirect_count']);
//倒数第二段是服务器最后一次response的http头
$header = $httpArr[count($httpArr) - 2];
//倒数第一段是服务器最后一次response的内容
$body = $httpArr[count($httpArr) - 1];
$header.="\r\n";
//获取最后一次response的header信息
preg_match_all('/([a-z0-9-_]+):\s*([^\r\n]+)\r\n/i', $header, $matches);
if (!emptyempty($matches) && count($matches) == 3 && !emptyempty($matches[1]) && !emptyempty($matches[1])) {
for ($i = 0; $i count($matches[1]); $i++) {
if (array_key_exists($i, $matches[2])) {
$responseHeaders[$matches[1][$i]] = $matches[2][$i];
}
}
}
//获取图片后缀名
if (0 '{(?:[^\/\\\\]+)\.(jpg|jpeg|gif|png|bmp)$}i', $url, $matches)) {
$originalfilename = $matches[0];
$ext = $matches[1];
} else {
if (array_key_exists('Content-Type', $responseHeaders)) {
if (0 '{image/(\w+)}i', $responseHeaders['Content-Type'], $extmatches)) {
$ext = $extmatches[1];
}
}
}
//保存文件
if (!emptyempty($ext)) {
//如果目录不存在，则先要创建目录
if(!is_dir($filepath)){
mkdir($filepath, 0777, true);
}
$filepath .= '/'.$filename.".$ext";
$local_file = fopen($filepath, 'w');
if (false !== $local_file) {
if (false !== fwrite($local_file, $body)) {
fclose($local_file);
$sizeinfo = getimagesize($filepath);
return array('filepath' => realpath($filepath), 'width' => $sizeinfo[0], 'height' => $sizeinfo[1], 'orginalfilename' => $originalfilename, 'filename' => pathinfo($filepath, PATHINFO_BASENAME));
}
}
}
}
return false;
}
/**
* 查找ip是否在某个段位里面
* @param string $ip 要查询的ip
* @param $arrIP 禁止的ip
* @return boolean
*/
public static function ipAccess($ip='0.0.0.0', $arrIP = array()){
$access = true;
$ip && $arr_cur_ip = explode('.', $ip);
foreach((array)$arrIP as $key=> $value){
if($value == '*.*.*.*'){
$access = false; //禁止所有
break;
}
$tmp_arr = explode('.', $value);
if(($arr_cur_ip[0] == $tmp_arr[0]) && ($arr_cur_ip[1] == $tmp_arr[1])) {
//前两段相同
if(($arr_cur_ip[2] == $tmp_arr[2]) || ($tmp_arr[2] == '*')){
//第三段为* 或者相同
if(($arr_cur_ip[3] == $tmp_arr[3]) || ($tmp_arr[3] == '*')){
//第四段为* 或者相同
$access = false; //在禁止ip列，则禁止访问
break;
}
}
}
}
return $access;
}
/**
* @param string $string 原文或者密文
* @param string $operation 操作(ENCODE | DECODE), 默认为 DECODE
* @param string $key 密钥
* @param int $expiry 密文有效期, 加密时候有效，单位秒，0 为永久有效
* @return string 处理后的原文或者经过 base64_encode 处理后的密文
*
* @example
*
* $a = authcode('abc', 'ENCODE', 'key');
* $b = authcode($a, 'DECODE', 'key'); // $b(abc)
*
* $a = authcode('abc', 'ENCODE', 'key', 3600);