Home Backend Development PHP Tutorial 直接可以拿来用的PHP惯用功能代码片段(21~25)

直接可以拿来用的PHP惯用功能代码片段(21~25)

Jun 13, 2016 pm 12:34 PM
date function php server

直接可以拿来用的PHP常用功能代码片段(21~25)

文章来源:jquery教程?-?http://www.jq-school.com/Show.aspx?id=330

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刚开始以为收集PHP技巧会有困难的,现在不知不觉又收集了25个了,其实PHP原始为Personal Home Page的缩写,已经正式更名为 "PHP: Hypertext Preprocessor",注意不是“Hypertext Preprocessor”的缩写,这种将名称放到定义中的写法被称作递归缩写。

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PHP于1994年由Rasmus Lerdorf创建,刚刚开始是Rasmus Lerdorf 为了要维护个人网页而制作的一个简单的用Perl语言编写的程序。这些工具程序用来显示 Rasmus Lerdorf 的个人履历,以及统计网页流量。

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后来又用C语言重新编写,包括可以访问数据库,他将这些程序和一些表单直译器整合起来,称为 PHP/FI,PHP/FI 可以和数据库连接,产生简单的动态网页程序,前端的网友如果学习后台开发的话可以选择PHP哇。

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看一下前面已经分享的代码片段

1、PHP常用功能代码片段(1~5)

2、PHP常用功能代码片段(6~10)

3、PHP常用功能代码片段(11~15)

4、PHP常用功能代码片段(16~20)

今天是第5篇,主要有获取当前页面完整url地址、二维数组排序、获得一段时间内所在的所有周的时间、把字符内容转换为二进制、把二进制转换为字符内容等功能,也就是第21到25这5个实用代码片段,希望可以帮到jquery学堂群里面的成员和广大对PHP开发的网友们提高开发效率。


21、PHP实现获取当前页面完整url地址的函数

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function get_url(){

    $url = (isset($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] == '443') ? 'https://' : 'http://';

    $url .= $_SERVER['HTTP_HOST'];

    $url .= isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : urlencode($_SERVER['PHP_SELF']) . '?' . urlencode($_SERVER['QUERY_STRING']);

    return $url;

}

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22、PHP实现二维数组排序的通用方法

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function array_sort($arr,$keys,$type='asc'){

    $keysvalue = $new_array = array();

    foreach ($arr as $k=>$v){

        $keysvalue[$k] = $v[$keys];

    }

    if($type == 'asc'){

        asort($keysvalue);

    }else{

        arsort($keysvalue);

    }

    reset($keysvalue);

    foreach ($keysvalue as $k=>$v){

        $new_array[$k] = $arr[$k];

    }

    return $new_array;

}

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23、PHP实现获得一段时间内所在的所有周的时间

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function getWeek($startdate,$enddate)

{

    //参数不能为空

    if(!empty($startdate) && !empty($enddate)){

     

        //先把两个日期转为时间戳

        $startdate=strtotime($startdate);

        $enddate=strtotime($enddate);

        //开始日期不能大于结束日期

        if($startdate<=$enddate){

            $end_date=strtotime("next monday",$enddate);

            if(date("w",$startdate)==1){

                $start_date=$startdate;

            }else{

                $start_date=strtotime("last monday",$startdate);

            }

            //计算时间差多少周

            $countweek=($end_date-$start_date)/(7*24*3600);

            for($i=0;$i<$countweek;$i++){

                $sd=date("Y-m-d",$start_date);

                $ed=strtotime("+ 6 days",$start_date);

                $eed=date("Y-m-d",$ed);

                $arr[]=array($sd,$eed);

                $start_date=strtotime("+ 1 day",$ed);

            }

            return $arr;   

        }

    }

}

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24、PHP实现把字符内容转换为二进制
function StrToBin($str){

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function StrToBin($str){

    //1.列出每个字符

    $arr = preg_split('/(?<!^)(?!$)/u', $str);

    //2.unpack字符

    foreach($arr as &$v){

        $temp = unpack('H*', $v);

        $v = base_convert($temp[1], 16, 2);

        unset($temp);

    }

    return join(' ',$arr);

}

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25、PHP实现把二进制转换为字符内容
function BinToStr($str){

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function BinToStr($str){

    $arr = explode(' ', $str);

    foreach($arr as &$v){

        $v = pack("H".strlen(base_convert($v, 2, 16)), base_convert($v, 2, 16));

    }

    return join('', $arr);

}

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