php随笔

if (!function_exists('apache_ request _ headers ')) { 
        function apache_request_headers() { 
            foreach($_SERVER as $key=>$value) { 
                if (substr($key,0,5)=="HTTP_") { 
                    $key=str_replace(" ","-",ucwords(strtolower(str_replace("_"," ",substr($key,5))))); 
                    $out[$key]=$value; 
                }else{
                    $out[$key]=$value; 
        }
            } 
            return $out; 
        } 
}

time to string

function nummixed($mixedStr, $rawStr, $type=0){
        $book = function ($mixedStr, $type=0){
            $arr = str_split($mixedStr);
            $arr = array_values(array_unique($arr));
            if(($num = 10-count($arr))>0){
                $salt = ['f','2','d','j','c','7','z','t','k','g'];
                $salt = array_slice(array_diff($salt, $arr), 0, $num);
                $arr = array_merge($arr, $salt);
            }
            return $type==0 ? $arr : array_flip($arr);
        };
        $map = function(array $book, $rawStr){
            $arr = str_split(strval($rawStr));
            array_walk($arr, function(&$val, $key, $book){
                $val = $book[$val];
            }, $book);
            return implode('', $arr);
        };
        return $map($book($mixedStr, $type), $rawStr);
    }

function magtime($inputs,$to = '2str'){
    if($to=='2str'&&!(is_numeric($inputs))&&!($to=='2num'&&preg_match("/^[a-z]{2,10}$/",$inputs))) return false;
    $skeys = $akeys = array('f','a','d','e','c','y','z','t','k','g');
    sort($skeys);
    $inputs = str_split($inputs);
    if($to=='2str'){
        $ft_key = array_rand($akeys);
        $keys = $ft_key%2==0 ? $skeys : $akeys;
        $rs = '';
        foreach($inputs as $input){
            $rs .= $keys[$input];
        }
        $rs .= $akeys[$ft_key];
    }elseif($to=='2num'){
        $footer = array_pop($inputs);
        $ft_key = array_search($footer,$akeys);
        if($ft_key===false) return false;
        $keys = $ft_key%2==0 ? $skeys : $akeys;
        $keys = array_flip($keys);
        $rs = '';
        foreach($inputs as $input){
            $rs .= $keys[$input];
        }
    }
    return $rs;
}

$time = '1416896158';
echo $time;
echo "<br>";
$str = magtime($time);
echo $str;
echo "<br>";
$num = magtime($str,'2num');
echo $num;
echo "<br>";

/**
 * 多条更新
 * @param string $table_name
 * @param array $val_cases
 * @param array $fields
 * @param string $pri_key
 * @return UPDATE
 */
function update_more($table_name,array $val_cases,array $fields,$pri_key = 'id'){
    $arr = update_lots_combine($val_cases,$fields,$pri_key);
    return update_lots($table_name,$arr['values'],$arr['cases'],$pri_key);
}
/**
 * 多条更新
 * @param string $table_name
 * @param array $values array('name'=>array('kate','jim'++),'age'=>array('16','18'++))
 * @param array $cases array(array('id'=>'1','rank'=>'2'),array('id'=>'4','rank'=>'3')++);
 * @param $pri_key
 * @return UPDATE user SET `name`= CASE WHEN id='1' AND rank='2' THEN 'kate' WHEN id='4' AND rank='3' 
 *THEN 'jim' ELSE `name` END, `age`= CASE  WHEN id='1' AND rank='2' THEN '16' WHEN id='4' AND rank='3'
 *THEN '18' ELSE `age` END  WHERE `id` IN (1,4,5)
 */
function update_lots($table_name,$values,$cases,$pri_key = 'id'){
    if(!is_array($values) || !is_array($cases) || !count($values)) return false;
    foreach($cases as $case_key => $case_fields){
        foreach($case_fields as $case_field => $case_value){
            !isset($pri_key) && $pri_key = $case_field;//for where ids
            !isset($ids[$case_key]) && $ids[$case_key] = $case_value;//for where ids
            $case_sql_piece[]=$case_field."='".$case_value."'";
        }
        $case_sql[] = implode(' AND ',$case_sql_piece);
        unset($case_sql_piece);
    }
    !empty($ids)&&$where = " WHERE `$pri_key` IN (".implode(',',$ids).") ";
    
    $sql = "UPDATE ".$table_name.' SET ';
    $csql = '';
    foreach($values as $field=>$fieldvalues){
        $csql .= "`".$field."`"."= CASE ";
        foreach($values[$field] as $key=>$fieldvalue){
            !isset($case_sql[$key]) && $case_sql[$key] = $case_sql[0];
            $csql .= " WHEN {$case_sql[$key]} THEN '{$fieldvalue}'"; 
        }
        $csql .= " ELSE `{$field}`  END,";
    }
    $sql .= rtrim($csql,',');
    isset($where) && $sql .= $where;
    return $sql;
}
/**
 * 多条更新参数设置
 * @param array $val_cases array(array('value'=>array('kate',16),'where'=>array($pri_key=>'1','rank'=>'2')), 
 *     array('value'=>array('jim',18),'where'=>array($pri_key=>'4','rank'=>'3')))
 * @param array $fields array('name','age')
 * @param string $pri_key id
 * @return boolean|unknown[]
 */
function update_lots_combine(array $val_cases,array $fields,$pri_key = 'id'){
    if(!is_array($val_cases) || !is_array($fields)) return false;
    foreach($val_cases as $row){
        foreach($fields as $k=>$field){
            if(!isset($row['value'][$k])){exit('批量更新参数不匹配！');}
            $values[$field][] = $row['value'][$k];
        }
        $cases[] = $row['where'];
    }
    return array('values'=>$values,'cases'=>$cases);
}