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HomeBackend DevelopmentPHP 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

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;
}


22、PHP实现二维数组排序的通用方法

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; 
} 


23、PHP实现获得一段时间内所在的所有周的时间

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;	
		}
	}
}


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

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);
}



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

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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