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/**
* Helper class
* @author www.shouce.ren
*
*/
class Helper
{
/**
* Determine the current server system
* @return string
*/
public static function getOS(){
if(PATH_SEPARATOR == ':'){
return 'Linux';
}else{
return 'Windows';
}
}
/**
* Current microsecond number
* @return number
*/
public static function microtime_float() {
list ( $usec, $sec ) = explode ( " ", microtime () );
return (( float ) $usec ( float ) $sec);
}
/**
* Cut a string in utf-8 format (one Chinese character or character occupies one byte)
*
* @author zhao jinhan
* @version v1.0.0
*
*/
public static function truncate_utf8_string($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;
}
/**
* Traverse folders
* @param string $dir
* @param boolean $all true means recursive traversal
* @return array
*/
public static function scanfDir($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' );
//Email configuration
$mailer->SetLanguage('zh_cn');
$mailer->Host = Yii::app()->params['emailHost']; //Sending mail server
$mailer->Port = Yii::app()->params['emailPort']; //Mail port
$mailer->Timeout = Yii::app()->params['emailTimeout'];//Email sending timeout
$mailer->ContentType = 'text/html';//Set html format
$mailer->SMTPAuth = true;
$mailer->Username = Yii::app()->params['emailUserName'];
$mailer->Password = Yii::app()->params['emailPassword'];
$mailer->IsSMTP ();
$mailer->From = $mailer->Username; // Sender’s email address
$mailer->FromName = Yii::app()->params['emailFormName']; // Sender’s name
$mailer->AddReplyTo ( $mailer->Username );
$mailer->CharSet = 'UTF-8';
//Add email log
$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;
}
}
/**
* Determine whether the string is utf-8 or 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;
$preg = array(
conditions), this range actually includes Traditional Chinese characters
); if ($default == 'gb2312') {
} else { }
if (!preg_match($preg[$default], $str)) {
return $option;
}
$str = @iconv($default, $option, $str);
//Cannot be converted to $option, indicating that the original one is not $default
empty
$str)) { return $option;
}
return $default; }
/**
* UTF-8 and gb2312 automatic conversion
* @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) {
$char =
$i};
}
if (strtoupper ( $encoding) ==
$outEncoding))
return
else
return @iconv ($encoding, $outEncoding, $string);
/**
* Returns all values of a key name in the two-dimensional array
* @param input $array * @param string $key * @return array
*/
public static function array_key_values(
array(), $key='')
$ret =
foreach((array)$array as $k=>$v){
$ret[$k] = $v[$key];
} return $ret; }
/**
* Determine whether the file/directory is writable (replacing the system's own is_writeable function)
* @param string $file file/directory
* @return boolean
*/
public static function is_writeable($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;
}
/**
* Formatting unit
*/
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];
}
/**
* Drop-down box, radio button automatic selection
*
* @param $string Input characters
* @param $param Conditions
* @param $type Type
* 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;
}
/**
* Download remote images
* @param string $url The absolute url of the image
* @param string $filepath The full path of the file (such as /www/images/test). This function will automatically determine the suffix name of the image based on the image URL and http header information
* @param string $filename The name of the file to be saved (excluding extension)
* @return mixed Returns an array describing the image information if the download is successful, false if the download fails
*/
static public function downloadImage($url, $filepath, $filename) {
//Header information returned by the server
$responseHeaders = array();
//Original picture name
$originalfilename = '';
//The suffix name of the picture
$ext = '';
$ch = curl_init($url);
//Set the value returned by curl_exec to include the HTTP header
curl_setopt($ch, CURLOPT_HEADER, 1);
//Set the value returned by curl_exec to include Http content
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
//Set the page after crawling jump (http 301, 302)
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
//Set the maximum number of HTTP redirects
curl_setopt($ch, CURLOPT_MAXREDIRS, 3);
//Data returned by the server (including http header information and content)
$html = curl_exec($ch);
//Get relevant information about this crawl
$httpinfo = curl_getinfo($ch);
curl_close($ch);
if ($html !== false) {
// Separate the header and body of the response. Since the server may use 302 jumps, the string needs to be separated into 2 substrings with the number of jumps
//The penultimate paragraph is the http header of the server’s last response
$header = $httpArr[count($httpArr) - 2];
//The penultimate paragraph is the content of the server’s last response
$body = $httpArr[count($httpArr) - 1];
$header.="rn";
//Get the header information of the last response
preg_match_all('/([a-z0-9-_] ):s*([^rn] )rn/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]; >
if (0 '{(?:[^/\\] ).(jpg|jpeg|gif|png|bmp)$}i',
$url ,
$originalfilename = $matches[0]; $ext =
} else {
if (array_key_exists('Content-Type',
i', $responseHeaders['Content-Type'], $extmatches)) {
empty
$ext)) {
//If the directory does not exist, you must create the directory first if(!is_dir(
mkdir($filepath, 0777, true);
$filepath .= '/'.$filename.".$ext";
$local_file = fopen($filepath, 'w');
fclose($local_file); ,
$sizeinfo[1], 'orginalfilename' => >$filepath, PATHINFO_BASENAME));
} return false; }
/**
* Find if the IP is in a certain rank
* @param string $ip The IP to be queried
* @param $arrIP Banned ip
* @return boolean
*/
public static function ipAccess($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 Original text or cipher text
* @param string $operation operation (ENCODE | DECODE), the default is DECODE
* @param string $key key
* @param int $expiry Ciphertext validity period, valid when encrypted, unit seconds, 0 means permanent validity
* @return string The processed original text or the cipher text processed by base64_encode
*
* @example
*
* $a = authcode('abc', 'ENCODE', 'key');
* $b = authcode($a, 'DECODE', 'key'); // $b(abc)
*
* $a = authcode('abc', 'ENCODE', 'key', 3600);

Share a complete list of commonly used PHP tools in your own projects, share a complete list of PHP tools_PHP Tutorial

Share a complete list of commonly used PHP tools in your own projects, share a complete list of PHP tools