常用方法

  1 1.
  2 /**
  3  * 友好时间
  4  */
  5 function fdate($time) {
  6     if (! $time)
  7         return false;
  8     $fdate = ‘‘ ;
  9     $d = time() - intval($time);
 10     $ld = $time - mktime(0 , 0, 0, 0 , 0, date(‘Y‘ )); //年
 11     $md = $time - mktime( 0, 0 , 0, date(‘m‘ ), 0, date(‘Y‘ )); //月
 12     $byd = $time - mktime( 0, 0 , 0, date(‘m‘ ), date( ‘d‘) - 2, date(‘Y‘ )); //前天
 13     $yd = $time - mktime( 0, 0 , 0, date(‘m‘ ), date( ‘d‘) - 1, date(‘Y‘ )); //昨天
 14     $dd = $time - mktime( 0, 0 , 0, date(‘m‘ ), date( ‘d‘), date(‘Y‘ )); //今天
 15     $td = $time - mktime( 0, 0 , 0, date(‘m‘ ), date( ‘d‘) + 1, date(‘Y‘ )); //明天
 16     $atd = $time - mktime( 0, 0 , 0, date(‘m‘ ), date( ‘d‘) + 2, date(‘Y‘ )); //后天
 17     if ($d == 0) {
 18         $fdate = ‘刚刚‘ ;
 19     } else {
 20         switch ($d) {
 21             case $d < $atd:
 22                 $fdate = date( ‘Y年m月d日‘ , $time);
 23                 break;
 24             case $d < $td:
 25                 $fdate = ‘后天‘ . date (‘H:i‘, $time);
 26                 break;
 27             case $d < 0:
 28                 $fdate = ‘明天‘ . date (‘H:i‘, $time);
 29                 break;
 30             case $d < 60:
 31                 $fdate = $d . ‘秒前‘;
 32                 break;
 33             case $d < 3600:
 34                 $fdate = floor($d / 60) . ‘分钟前‘;
 35                 break;
 36             case $d < $dd:
 37                 $fdate = floor($d / 3600) . ‘小时前‘;
 38                 break;
 39             case $d < $yd:
 40                 $fdate = ‘昨天‘ . date (‘H:i‘, $time);
 41                 break;
 42             case $d < $byd:
 43                 $fdate = ‘前天‘ . date (‘H:i‘, $time);
 44                 break;
 45             case $d < $md:
 46                 $fdate = date( ‘m月d H:i‘, $time);
 47                 break;
 48             case $d < $ld:
 49                 $fdate = date( ‘m月d‘, $time);
 50                 break;
 51             default:
 52                 $fdate = date( ‘Y年m月d日‘ , $time);
 53                 break;
 54         }
 55     }
 56     return $fdate;
 57 }
 58 
 59 /**
 60  * 靓号分隔
 61  * Enter description here ...
 62  * @param unknown_type $num
 63  */
 64 function phone_number_format($num){
 65       $number1 = substr($num , 0,3 );
 66       $number2 = substr($num , 3,4 );
 67       $number3 = substr($num , 7,4 );
 68       $number  = $number1.‘ ‘ .$number2.‘ ‘.$number3;
 69       return $number;
 70 }
 71 
 72 2.
 73 function format_price($price)
 74 {
 75       return ‘￥‘ .‘‘. round($price,2 );
 76 }
 77 
 78 3.
 79 //utf8 字符串截取
 80 function msubstr($str, $start =0, $length =15, $charset ="utf-8", $suffix=false)
 81 {
 82       if(function_exists ("mb_substr"))
 83     {
 84         $slice =  mb_substr($str, $start, $length, $charset);
 85         if($suffix& $slice!=$str) return $slice."…" ;
 86       return $slice;
 87     }
 88     elseif(function_exists (‘iconv_substr‘)) {
 89         return iconv_substr($str,$start,$length,$charset);
 90     }
 91     $re [‘utf-8‘]   = "/[\x01- \x7f]|[\xc2 -\xdf][ \x80-\xbf ]|[\xe0- \xef][\x80 -\xbf]{2}|[ \xf0-\xff ][\x80- \xbf]{3}/";
 92     $re [‘gb2312‘] = "/[\x01 -\x7f]|[ \xb0-\xf7 ][\xa0- \xfe]/";
 93     $re [‘gbk‘]    = "/[\x01 -\x7f]|[ \x81-\xfe ][\x40- \xfe]/";
 94     $re [‘big5‘]   = "/[\x01- \x7f]|[\x81 -\xfe]([ \x40-\x7e ]|\xa1- \xfe])/";
 95     preg_match_all($re[ $charset], $str, $match);
 96     $slice = join( "",array_slice ($match[0 ], $start, $length));
 97     if($suffix&& $slice!=$str) return $slice."…" ;
 98     return $slice;
 99 }
100 
101 4.
102 /**
103   * 生成随机字串
104   * @param number $length 长度，默认为16，最长为32字节
105   * @return string
106   */
107 public function generateNonceStr($length =16){
108             // 密码字符集，可任意添加你需要的字符
109             $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789" ;
110            $str = "" ;
111             for($i = 0; $i < $length; $i++)
112            {
113                 $str .= $chars [mt_rand( 0, strlen ($chars) - 1 )];
114            }
115             return $str;
116 }
117 
118 /**
119   * 获取毫秒级别的时间戳
120   */
121 private static function getMillisecond()
122 {
123         //获取毫秒的时间戳
124         $time = explode ( " ", microtime () );
125         $time = $time[1] . ($time[0] * 1000);
126         $time2 = explode( ".", $time );
127         $time = $time2[0];
128         return $time;
129 }  
130 
131 5.
132 /**
133  * 获取数组中的某一列
134  * @param type $arr 数组
135  * @param type $key_name  列名
136  * @return type  返回那一列的数组
137  */
138 function get_arr_column($arr, $key_name)
139 {
140     $arr2 = array();
141     foreach($arr as $key => $val){
142         $arr2[] = $val[$key_name];        
143     }
144     return $arr2;
145 }  
146 
147 6.
148 /**
149  * 将二维数组以元素的某个值作为键 并归类数组
150  * array( array(‘name‘=>‘aa‘,‘type‘=>‘pay‘), array(‘name‘=>‘cc‘,‘type‘=>‘pay‘) )
151  * array(‘pay‘=>array( array(‘name‘=>‘aa‘,‘type‘=>‘pay‘) , array(‘name‘=>‘cc‘,‘type‘=>‘pay‘) ))
152  * @param $arr 数组
153  * @param $key 分组值的key
154  * @return array
155  */
156 function group_same_key($arr,$key){
157     $new_arr = array();
158     foreach($arr as $k=>$v ){
159         $new_arr[$v[$key]][] = $v;
160     }
161     return $new_arr;
162 }  
163 
164 7.
165 /**
166  * 过滤数组元素前后空格 (支持多维数组)
167  * @param $array 要过滤的数组
168  * @return array|string
169  */
170 function trim_array_element($array){
171     if(!is_array($array))
172         return trim($array);
173     return array_map(‘trim_array_element‘,$array);
174 }  
175 
176 
177 8.
178 //php获取中文字符拼音首字母
179 function getFirstCharter($str){
180       if(empty($str))
181       {
182             return ‘‘;          
183       }
184       $fchar=ord($str{0});
185       if($fchar>=ord(‘A‘)&&$fchar<=ord(‘z‘)) return strtoupper($str{0});
186       $s1=iconv(‘UTF-8‘,‘gb2312‘,$str);
187       $s2=iconv(‘gb2312‘,‘UTF-8‘,$s1);
188       $s=$s2==$str?$s1:$str;
189       $asc=ord($s{0})*256+ord($s{1})-65536;
190      if($asc>=-20319&&$asc<=-20284) return ‘A‘;
191      if($asc>=-20283&&$asc<=-19776) return ‘B‘;
192      if($asc>=-19775&&$asc<=-19219) return ‘C‘;
193      if($asc>=-19218&&$asc<=-18711) return ‘D‘;
194      if($asc>=-18710&&$asc<=-18527) return ‘E‘;
195      if($asc>=-18526&&$asc<=-18240) return ‘F‘;
196      if($asc>=-18239&&$asc<=-17923) return ‘G‘;
197      if($asc>=-17922&&$asc<=-17418) return ‘H‘;
198      if($asc>=-17417&&$asc<=-16475) return ‘J‘;
199      if($asc>=-16474&&$asc<=-16213) return ‘K‘;
200      if($asc>=-16212&&$asc<=-15641) return ‘L‘;
201      if($asc>=-15640&&$asc<=-15166) return ‘M‘;
202      if($asc>=-15165&&$asc<=-14923) return ‘N‘;
203      if($asc>=-14922&&$asc<=-14915) return ‘O‘;
204      if($asc>=-14914&&$asc<=-14631) return ‘P‘;
205      if($asc>=-14630&&$asc<=-14150) return ‘Q‘;
206      if($asc>=-14149&&$asc<=-14091) return ‘R‘;
207      if($asc>=-14090&&$asc<=-13319) return ‘S‘;
208      if($asc>=-13318&&$asc<=-12839) return ‘T‘;
209      if($asc>=-12838&&$asc<=-12557) return ‘W‘;
210      if($asc>=-12556&&$asc<=-11848) return ‘X‘;
211      if($asc>=-11847&&$asc<=-11056) return ‘Y‘;
212      if($asc>=-11055&&$asc<=-10247) return ‘Z‘;
213      return null;
214 }
215 
216 9.
217 /**
218  * 判断当前访问的用户是  PC端  还是 手机端  返回true 为手机端  false 为PC 端
219  * @return boolean
220  */
221 /**
222 　　* 是否移动端访问访问
223 　　*
224 　　* @return bool
225 　　*/
226 function isMobile()
227 {
228         // 如果有HTTP_X_WAP_PROFILE则一定是移动设备
229     if (isset ($_SERVER[‘HTTP_X_WAP_PROFILE‘]))
230     return true;
231     // 如果via信息含有wap则一定是移动设备,部分服务商会屏蔽该信息
232     if (isset ($_SERVER[‘HTTP_VIA‘]))
233     {
234     // 找不到为flase,否则为true
235     return stristr($_SERVER[‘HTTP_VIA‘], "wap") ? true : false;
236     }
237     // 脑残法，判断手机发送的客户端标志,兼容性有待提高
238     if (isset ($_SERVER[‘HTTP_USER_AGENT‘]))
239     {
240         $clientkeywords = array (‘nokia‘,‘sony‘,‘ericsson‘,‘mot‘,‘samsung‘,‘htc‘,‘sgh‘,‘lg‘,‘sharp‘,‘sie-‘,‘philips‘,‘panasonic‘,‘alcatel‘,‘lenovo‘,‘iphone‘,‘ipod‘,‘blackberry‘,‘meizu‘,‘android‘,‘netfront‘,‘symbian‘,‘ucweb‘,‘windowsce‘,‘palm‘,‘operamini‘,‘operamobi‘,‘openwave‘,‘nexusone‘,‘cldc‘,‘midp‘,‘wap‘,‘mobile‘);
241         // 从HTTP_USER_AGENT中查找手机浏览器的关键字
242         if (preg_match("/(" . implode(‘|‘, $clientkeywords) . ")/i", strtolower($_SERVER[‘HTTP_USER_AGENT‘])))
243             return true;
244     }
245         // 协议法，因为有可能不准确，放到最后判断
246     if (isset ($_SERVER[‘HTTP_ACCEPT‘]))
247     {
248     // 如果只支持wml并且不支持html那一定是移动设备
249     // 如果支持wml和html但是wml在html之前则是移动设备
250         if ((strpos($_SERVER[‘HTTP_ACCEPT‘], ‘vnd.wap.wml‘) !== false) && (strpos($_SERVER[‘HTTP_ACCEPT‘], ‘text/html‘) === false || (strpos($_SERVER[‘HTTP_ACCEPT‘], ‘vnd.wap.wml‘) < strpos($_SERVER[‘HTTP_ACCEPT‘], ‘text/html‘))))
251         {
252             return true;
253         }
254     }
255             return false;
256  }