php常用函数

(1)php判断检测一个数组里有没有重复的值
if (count($array) != count(array_unique($array))) {    
        echo ‘该数组有重复值‘;   
}  
(2)处理从前端传来的json数据
public function dealJson($param){
        return json_decode(htmlspecialchars_decode($param), true);
}
(3)字符串转条件
public static function str2where($condition) {
        if (self::check_condition($condition)) {
            $condition = preg_replace(‘/^(and|or)/i‘, ‘‘, $condition);
            $condition = str_replace(array(‘--‘, ‘__‘), array(‘ ‘, "‘ "), $condition);
            $old_char = array(‘ ne ‘, ‘ eq ‘, ‘ lt ‘, ‘ gt ‘, ‘ le ‘, ‘ ge ‘, ‘ ct ‘, ‘ nct ‘);
            $new_char = array(" != ‘", " = ‘", " < ‘", " > ‘", " <= ‘", " >= ‘", " like ‘%", " not like ‘%");
            $condition = str_replace($old_char, $new_char, $condition);
            $condition = preg_replace("/\s+(like\s+‘[^‘]+)(‘|$)/i", " $1%$2", $condition);
            if ($condition != ‘‘)
                $condition .= "‘";
            return $condition;
        }
        return null;
}
(4)获取汉字首字母
public function getFirstCharter($str){
        if (empty($str)) {
            return ‘‘;
        }
        $fchar = ord($str{0});
        if ($fchar >= ord(‘A‘) && $fchar <= ord(‘z‘)) return strtoupper($str{0});
        $s1 = iconv(‘UTF-8‘, ‘gb2312‘, $str);
        $s2 = iconv(‘gb2312‘, ‘UTF-8‘, $s1);
        $s = $s2 == $str ? $s1 : $str;
        $asc = ord($s{0}) * 256 + ord($s{1}) - 65536;
        if ($asc >= -20319 && $asc <= -20284) return ‘A‘;
        if ($asc >= -20283 && $asc <= -19776) return ‘B‘;
        if ($asc >= -19775 && $asc <= -19219) return ‘C‘;
        if ($asc >= -19218 && $asc <= -18711) return ‘D‘;
        if ($asc >= -18710 && $asc <= -18527) return ‘E‘;
        if ($asc >= -18526 && $asc <= -18240) return ‘F‘;
        if ($asc >= -18239 && $asc <= -17923) return ‘G‘;
        if ($asc >= -17922 && $asc <= -17418) return ‘H‘;
        if ($asc >= -17417 && $asc <= -16475) return ‘J‘;
        if ($asc >= -16474 && $asc <= -16213) return ‘K‘;
        if ($asc >= -16212 && $asc <= -15641) return ‘L‘;
        if ($asc >= -15640 && $asc <= -15166) return ‘M‘;
        if ($asc >= -15165 && $asc <= -14923) return ‘N‘;
        if ($asc >= -14922 && $asc <= -14915) return ‘O‘;
        if ($asc >= -14914 && $asc <= -14631) return ‘P‘;
        if ($asc >= -14630 && $asc <= -14150) return ‘Q‘;
        if ($asc >= -14149 && $asc <= -14091) return ‘R‘;
        if ($asc >= -14090 && $asc <= -13319) return ‘S‘;
        if ($asc >= -13318 && $asc <= -12839) return ‘T‘;
        if ($asc >= -12838 && $asc <= -12557) return ‘W‘;
        if ($asc >= -12556 && $asc <= -11848) return ‘X‘;
        if ($asc >= -11847 && $asc <= -11056) return ‘Y‘;
        if ($asc >= -11055 && $asc <= -10247) return ‘Z‘;

        return null;
}
(5)验证手机号
public  function IsMobile($string){
        $rule  = "/^((13[0-9])|170|147|(15[0-35-9])|(18[0-9]))[0-9]{8}$/";
        if(!preg_match($rule,$string)){
              return false;
        }else{
              return true;
        }
 }
(6)座机号码验证
public  function IsPhone($string){
        $rule  = "/^(0[0-9]{2,3}\-)?([2-9][0-9]{6,7})+(\-[0-9]{1,4})?$/";
        if(!preg_match($rule,$string)){
              return false;
        }else{
              return true;
        }
}
(7)邮编号码验证
public  function IsPostCode($string){
        $rule  = "/^[0-9]{6}$/";
        if(!preg_match($rule,$string)){
              return false;
        }else{
              return true;
        }
}
(8)邮箱验证
public  function IsEmail($string){
        $rule = "/^[_.0-9a-z-]+@([0-9a-z][0-9a-z-]+.)+[a-z]{2,3}$/";
        if(!preg_match($rule,$string)){
              return false;
        }else{
              return true;
        }
 }
(9)验证是否为数字
public  function IsNumber($string){
        $rule  = "/^[1-9]\d*$/";
        if(!preg_match($rule,$string)){
              return false;
        }else{
              return true;
        }
}
(10)验证小数点
public  function CheckPoints($str){
        if(ceil($str)==$str && floor($str)==$str){
              return true;
        }else{
            if (!ereg("^[0-5][.][0-9]{1,}", $str)) {
                  return false;
            }else{
                  return true;
            }
        }
 }
(11)验证金额是否正确
public  function MoneyIsCorrect($string){
        $rule  = "/^(([1-9]\d{0,9})|0)(\.\d{1,2})?$/";
        if(!preg_match($rule,$string)){
              return false;
        }else{
              return true;
        }
}
(12) 校验日期格式是否正确
public function IsDate($date, $format = ‘Y-m-d H:i:s‘) {
        $unixTime = strtotime($date);
        if (!$unixTime) { //strtotime转换不对，日期格式显然不对。
            return false;
        }
        //校验日期的有效性，只要满足其中一个格式就OK
        if (date($format, $unixTime) == $date) {
            return true;
        }
        return false;
}

(13)验证URL地址是否合法
public  function check_url($url){
      $pattern_3=‘/^http[s]?:\/\/‘.  ‘(([0-9]{1,3}\.){3}[0-9]{1,3}‘. ‘|‘. ‘([0-9a-z_!~*\‘()-]+\.)*‘. ‘([0-9a-z][0-9a-z-]{0,61})?[0-9a-z]\.‘. ‘[a-z]{2,6})‘.  ‘(:[0-9]{1,4})?‘.  ‘((\/\?)|‘.  ‘(\/[0-9a-zA-Z_!~\*\‘\(\)\.;\?:@&=\+\$,%#-\/]*)?)$/‘;
      if(preg_match($pattern_3, $url)){
            return ture;
      } else{
            return false;
      }
}
(14)格式化保留两位小数
function normal_number_format($v) {
        if(empty($v)) {
            return ‘0.00‘;
        }
        if(!is_numeric($v)) {
            return ‘NaN‘;
        }
        return number_format($v,2,‘.‘,‘,‘);
    }
(15)从html中获取图片地址
public function get_img_html($str){
        $pattern="/<img.*?src=[\‘|\"](.*?(?:[\.gif|\.jpg]))[\‘|\"].*?[\/]?>/";//取src
        preg_match_all($pattern,$str,$match);
        if(isset($match[1])&&!empty($match[1])){
              return $match[1];
        }
        return ‘‘;
}
(16)从字符串中获取http开头的地址
public  function get_http_url($str){
        $pattern=‘/https?:[^"]+/‘;
        preg_match_all($pattern,$str,$match);
        if(isset($match[0])){
              return $match[0];
        }
        return ‘‘;
}
(17)验证是否为微信浏览器
public function IsWechat() {
       $agent = isset($_SERVER[‘HTTP_USER_AGENT‘]) ? strtolower($_SERVER[‘HTTP_USER_AGENT‘]) : null;
       return (strpos($agent, ‘micromessenger‘) !== false);
}

(18)验证是否为IOS
public function IsIOS() {
      $agent = isset($_SERVER[‘HTTP_USER_AGENT‘]) ? strtolower($_SERVER[‘HTTP_USER_AGENT‘]) : null;
      return (strpos($agent, ‘iphone‘) !== false);
}
/* (19)作用:取得随机字符串
 * 参数:
 * 1、(int)$length = 32 #随机字符长度
 * 2、(int)$mode = 0    #随机字符类型，0为大小写英文和数字,1为数字,2为小写字母,3为大写字母,  4为大小写字母,5为大写字母和数字,6为小写字母和数字
 * 返回:取得的字符串
 */
public function get_code($length = 32, $mode = 0) {//获取随机验证码函数
    switch ($mode) {
        case ‘1‘:
              $str = ‘0123456789‘;
              break;
        case ‘2‘:
              $str = ‘abcdefghijklmnopqrstuvwxyz‘;
              break;
        case ‘3‘:
              $str = ‘ABCDEFGHIJKLMNOPQRSTUVWXYZ‘;
              break;
        case ‘4‘:
              $str = ‘ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz‘;
              break;
        case ‘5‘:
              $str = ‘ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890‘;
              break;
        case ‘6‘:
              $str = ‘abcdefghijklmnopqrstuvwxyz1234567890‘;
              break;
        default:
              $str = ‘ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890‘;
              break;
    }
    $checkstr = ‘‘;
    $len = strlen($str) - 1;
    for ($i = 0; $i < $length; $i++) {
            $num = mt_rand(0, $len); //产生一个0到$len之间的随机数
            $checkstr.=$str[$num];
    }
    return $checkstr;
}
(20)生成订单编号
public static function createOrderNo() {
        return date(‘YmdHis‘) . substr(implode(NULL, array_map(‘ord‘, str_split(substr(uniqid(), 7, 13), 1))), 0, 6);
}
/**
  * (21)获取唯一编号号
  * @param mixed $sql_model
  * $c:前缀，$table：表名，$prefiel：字段
  * @return string
  */
public function GetNum($c,$table,$prefiel){
        $cdh=date(‘YmdHis‘,strtotime($this->GetDateTimeMk(time())));
        $lscdh=substr(implode(NULL, array_map(‘ord‘, str_split(substr(uniqid(), 7, 13), 1))), 0, 8);
        $rdh=$c.substr($cdh,0,12).$lscdh;
        //判断编号号是否被占用
        $table_m=M($table);
        $rowcount=$table_m->where(‘"{$prefiel}"="‘.$rdh.‘"‘)->count();
        if($rowcount>0){
              $rdh=$this->GetNum();
        }
        return $rdh;
}
(22)创建短链接
public function shortUrl($url){
        $base32 = array (
              ‘a‘, ‘b‘, ‘c‘, ‘d‘, ‘e‘, ‘f‘, ‘g‘, ‘h‘,
              ‘i‘, ‘j‘, ‘k‘, ‘l‘, ‘m‘, ‘n‘, ‘o‘, ‘p‘,
              ‘q‘, ‘r‘, ‘s‘, ‘t‘, ‘u‘, ‘v‘, ‘w‘, ‘x‘,
              ‘y‘, ‘z‘, ‘0‘, ‘1‘, ‘2‘, ‘3‘, ‘4‘, ‘5‘
        );

        $hex = md5($url);
        $hexLength = strlen($hex);
        $subHexLen = $hexLength / 8;

        $output = array();
        for ($i = 0; $i < $subHexLen; $i++) {
            //每循环一次取到8位
            $subHex = substr ($hex, $i * 8, 8);
            $int = 0x3FFFFFFF & (1 * (‘0x‘.$subHex));
            $out = ‘‘;

            for ($j = 0; $j < 6; $j++) {
                $val = 0x0000001F & $int;
                $out .= $base32[$val];
                $int = $int >> 5;
            }
            $output[] = $out;
        }
        $re=$this->chechkShortUrl($output[‘0‘]);
        if($re){
            $this->shortUrl($url);
        }
        return $output[0];
}
// 验证短链接是否唯一
public function chechkShortUrl($url){
        $count=M(‘promotion_real_url‘)->where(‘short_url="‘.$url.‘"‘)->count();
        if($count==0){
            return false;//如果短链接不存在，则返回上面
        }
        return true;//如果存在，则返回短链接
}
(23)敏感词过滤
public function removeBadWords($badWord){
        $badword = C(‘bad_words‘);
        $badword1 = array_combine($badword,array_fill(0,count($badword),‘***‘));
        $str = strtr($badWord, $badword1);
        return $str;
}