php开发中经常用到的实例

1.PHP解析url并得到url中的参数

$url = 'http://www.baidu.com/index.php?m=content&c=index&a=lists&catid=6&area=0&author=0&h=0&region=0&s=1&page=1';$arr = parse_url($url);var_dump($arr);$arr_query = convertUrlQuery($arr['query']);var_dump($arr_query);var_dump(getUrlQuery($arr_query));/** * 将字符串参数变为数组 * @param $query * @return array array (size=10)     'm' => string 'content' (length=7)     'c' => string 'index' (length=5)     'a' => string 'lists' (length=5)     'catid' => string '6' (length=1)     'area' => string '0' (length=1)     'author' => string '0' (length=1)     'h' => string '0' (length=1)     'region' => string '0' (length=1)     's' => string '1' (length=1)     'page' => string '1' (length=1) */function convertUrlQuery($query){    $queryParts = explode('&', $query);    $params = array();    foreach ($queryParts as $param) {        $item = explode('=', $param);        $params[$item[0]] = $item[1];    }    return $params;}/** * 将参数变为字符串 * @param $array_query * @return string string 'm=content&c=index&a=lists&catid=6&area=0&author=0&h=0&region=0&s=1&page=1' (length=73) */function getUrlQuery($array_query){    $tmp = array();    foreach($array_query as $k=>$param)    {        $tmp[] = $k.'='.$param;    }    $params = implode('&',$tmp);    return $params;}

2,利用正则表达式实现手机号码中间4位用星号（*）替换显示

//Method 1：function hidtel($phone){    $IsWhat = preg_match('/(0[0-9]{2,3}[\-]?[2-9][0-9]{6,7}[\-]?[0-9]?)/i',$phone); //固定电话    if($IsWhat == 1){        return preg_replace('/(0[0-9]{2,3}[\-]?[2-9])[0-9]{3,4}([0-9]{3}[\-]?[0-9]?)/i','$1****$2',$phone);    }else{        return  preg_replace('/(1[358]{1}[0-9])[0-9]{4}([0-9]{4})/i','$1****$2',$phone);    }}//Method 2：$num = "13966778888"$str = substr_replace($num,'****',3,4);//实例：$phonenum = "13966778888";echo hidtel($phonenum);//最后输出：139****8888

3.php根据出生年月日计算生日 精确到xxxx年xx月xx天

function diffDate($date1,$date2){ $datestart= date('Y-m-d',strtotime($date1));    if(strtotime($datestart)>strtotime($date2)){         $tmp=$date2;         $date2=$datestart;         $datestart=$tmp;     }     list($Y1,$m1,$d1)=explode('-',$datestart);     list($Y2,$m2,$d2)=explode('-',$date2);     $Y=$Y2-$Y1; // 1    $m=$m2-$m1; // 0    $d=$d2-$d1; // -11    if($d<0){         $d+=(int)date('t',strtotime("-1 month $date2"));         $m=$m--;     }     if($m<0){         $m+=12;         $y=$y--;     }     if($Y == 0 && $m == 0 && $d != 0){return $d.'天';    }elseif($Y == 0 && $m != 0 && $d != 0){     return $m.'个月'.$d.'天';    }elseif($Y != 0 && $m == 0 && $d != 0){     return $Y.'年'.$d.'天';    }else{     return $Y.'年'.$m.'个月'.$d.'天';    }} 

4.php判断手机浏览还是web浏览

function isMobile(){      $useragent=isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : '';      $useragent_commentsblock=preg_match('|\(.*?\)|',$useragent,$matches)>0?$matches[0]:'';            function CheckSubstrs($substrs,$text){          foreach($substrs as $substr)              if(false!==strpos($text,$substr)){                  return true;              }              return false;      }    $mobile_os_list=array('Google Wireless Transcoder','Windows CE','WindowsCE','Symbian','Android','armv6l','armv5','Mobile','CentOS','mowser','AvantGo','Opera Mobi','J2ME/MIDP','Smartphone','Go.Web','Palm','iPAQ');    $mobile_token_list=array('Profile/MIDP','Configuration/CLDC-','160×160','176×220','240×240','240×320','320×240','UP.Browser','UP.Link','SymbianOS','PalmOS','PocketPC','SonyEricsson','Nokia','BlackBerry','Vodafone','BenQ','Novarra-Vision','Iris','NetFront','HTC_','Xda_','SAMSUNG-SGH','Wapaka','DoCoMo','iPhone','iPod');      $found_mobile=CheckSubstrs($mobile_os_list,$useragent_commentsblock) ||                CheckSubstrs($mobile_token_list,$useragent);      if ($found_mobile){          return true;      }else{          return false;      }  }if (isMobile()){    header('location: ./app/index.php');//如果为手机端，执行跳转}else{    header('location: ./web/index.php');//如果非手机端，执行跳转}

5.时间戳转时间格式,时间格式转xx小时前

/** * 将时间转换为 xx小时前 * @param {Object} pTime */function jsDateDiff(pTime) {    var d_minutes, d_hours, d_days, d;    var timeNow = parseInt(new Date().getTime() / 1000);    pTime_new = new Date(pTime).getTime() / 1000;    d = timeNow - pTime_new;    d_days = parseInt(d / 86400);    d_hours = parseInt(d / 3600);    d_minutes = parseInt(d / 60);    if (d_days > 0 && d_days < 4) {        return d_days + "天前";    } else if (d_days <= 0 && d_hours > 0) {        return d_hours + "小时前";    } else if (d_hours <= 0 && d_minutes > 0) {        return d_minutes + "分钟前";    } else {        return pTime;    }}