PHP实用代码片段(三)

2018-02-27 09:00:08来源:cnblogs.com作者:dreams7433人点击

分享

1. 目录清单

使用下面的 PHP 代码片段可以在一个目录中列出所有文件和文件夹。

function list_files($dir){    if(is_dir($dir))    {        if($handle = opendir($dir))        {            while(($file = readdir($handle)) !== false)            {                if($file != "." &amp;&amp; $file != ".." &amp;&amp; $file != "Thumbs.db"/*pesky windows, images..*/)                {                    echo '<a target="_blank" href="'.$dir.$file.'">'.$file.'</a><br>'."/n";                }            }            closedir($handle);        }    }}

语法:

<?php    list_files("images/"); //This will list all files of images folder?>

2. 检测用户语言

使用下面的 PHP 代码片段可以检测用户浏览器所使用的语言。

function get_client_language($availableLanguages, $default='en'){    if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {        $langs=explode(',',$_SERVER['HTTP_ACCEPT_LANGUAGE']);        foreach ($langs as $value){            $choice=substr($value,0,2);            if(in_array($choice, $availableLanguages)){                return $choice;            }        }    }     return $default;}

3. 查看 CSV 文件

function readCSV($csvFile){    $file_handle = fopen($csvFile, 'r');    while (!feof($file_handle) ) {        $line_of_text[] = fgetcsv($file_handle, 1024);    }    fclose($file_handle);    return $line_of_text;}

语法:

<?php$csvFile = "test.csv";$csv = readCSV($csvFile);$a = csv[0][0]; // This will get value of Column 1 & Row 1?>

4. 从 PHP 数据创建 CSV 文件

function generateCsv($data, $delimiter = ',', $enclosure = '"') {   $handle = fopen('php://temp', 'r+');   foreach ($data as $line) {           fputcsv($handle, $line, $delimiter, $enclosure);   }   rewind($handle);   while (!feof($handle)) {           $contents .= fread($handle, 8192);   }   fclose($handle);   return $contents;}

语法:

<?php$data[0] = "apple";$data[1] = "oranges";generateCsv($data, $delimiter = ',', $enclosure = '"');?>

5. 解析 XML 数据

$xml_string="<?xml version='1.0'?><moleculedb>    <molecule name='Benzine'>        <symbol>ben</symbol>        <code>A</code>    </molecule>    <molecule name='Water'>        <symbol>h2o</symbol>        <code>K</code>    </molecule></moleculedb>"; //load the xml string using simplexml function$xml = simplexml_load_string($xml_string); //loop through the each node of moleculeforeach ($xml->molecule as $record){   //attribute are accessted by   echo $record['name'], '  ';   //node are accessted by -> operator   echo $record->symbol, '  ';   echo $record->code, '<br />';}

6. 解析 JSON 数据

$json_string='{"id":1,"name":"rolf","country":"russia","office":["google","oracle"]} ';$obj=json_decode($json_string);//print the parsed dataecho $obj->name; //displays rolfecho $obj->office[0]; //displays google

7. 获取当前页面 URL

这个 PHP 片段可以帮助你让用户登录后直接跳转到之前浏览的页面。

function current_url(){$url = "http://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];$validURL = str_replace("&", "&amp;", $url);return validURL;}

语法:

<?phpecho "Currently you are on: ".current_url();?>

8. 从任意的 Twitter 账号获取最新的 Tweet

function my_twitter($username) {     $no_of_tweets = 1;     $feed = "http://search.twitter.com/search.atom?q=from:" . $username . "&rpp=" . $no_of_tweets;     $xml = simplexml_load_file($feed);    foreach($xml->children() as $child) {        foreach ($child as $value) {            if($value->getName() == "link") $link = $value['href'];            if($value->getName() == "content") {                $content = $value . "";        echo '<p class="twit">'.$content.' <a class="twt" href="'.$link.'" title="">&nbsp; </a></p>';            }            }    }    }

语法:

<?php$handle = "koonktech";my_twitter($handle);?>

9. 转发数量

使用这个 PHP 片段可以检测你的页面 URL 有多少转发数量。

function tweetCount($url) {    $content = file_get_contents("http://api.tweetmeme.com/url_info?url=".$url);    $element = new SimpleXmlElement($content);    $retweets = $element->story->url_count;    if($retweets){        return $retweets;    } else {        return 0;    }}

语法:

<?php$url = "http://blog.koonk.com";$count = tweetCount($url);return $count;?>

10. 计算两个日期的差

<?php$date1 = date( 'Y-m-d' );$date2 = "2015-12-04";$diff = abs(strtotime($date2) - strtotime($date1));$years = floor($diff / (365*60*60*24));$months = floor(($diff - $years * 365*60*60*24) / (30*60*60*24));$days = floor(($diff - $years * 365*60*60*24 - $months*30*60*60*24)/ (60*60*24));printf("%d years, %d months, %d days/n", $years, $months, $days);-------------------------------------------------------- OR$date1 = new DateTime("2007-03-24");$date2 = new DateTime("2009-06-26");$interval = $date1->diff($date2);echo "difference " . $interval->y . " years, " . $interval->m." months, ".$interval->d." days "; // shows the total amount of days (not divided into years, months and days like above)echo "difference " . $interval->days . " days ";-------------------------------------------------------- OR        /** * Calculate differences between two dates with precise semantics. Based on PHPs DateTime::diff() * implementation by Derick Rethans. Ported to PHP by Emil H, 2011-05-02. No rights reserved. *  * See here for original code: * http://svn.php.net/viewvc/php/php-src/trunk/ext/date/lib/tm2unixtime.c?revision=302890&view=markup * http://svn.php.net/viewvc/php/php-src/trunk/ext/date/lib/interval.c?revision=298973&view=markup */function _date_range_limit($start, $end, $adj, $a, $b, $result){    if ($result[$a] < $start) {        $result[$b] -= intval(($start - $result[$a] - 1) / $adj) + 1;        $result[$a] += $adj * intval(($start - $result[$a] - 1) / $adj + 1);    }    if ($result[$a] >= $end) {        $result[$b] += intval($result[$a] / $adj);        $result[$a] -= $adj * intval($result[$a] / $adj);    }    return $result;}function _date_range_limit_days($base, $result){    $days_in_month_leap = array(31, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);    $days_in_month = array(31, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);    _date_range_limit(1, 13, 12, "m", "y", &$base);    $year = $base["y"];    $month = $base["m"];    if (!$result["invert"]) {        while ($result["d"] < 0) {            $month--;            if ($month < 1) {                $month += 12;                $year--;            }            $leapyear = $year % 400 == 0 || ($year % 100 != 0 && $year % 4 == 0);            $days = $leapyear ? $days_in_month_leap[$month] : $days_in_month[$month];            $result["d"] += $days;            $result["m"]--;        }    } else {        while ($result["d"] < 0) {            $leapyear = $year % 400 == 0 || ($year % 100 != 0 && $year % 4 == 0);            $days = $leapyear ? $days_in_month_leap[$month] : $days_in_month[$month];            $result["d"] += $days;            $result["m"]--;            $month++;            if ($month > 12) {                $month -= 12;                $year++;            }        }    }    return $result;}function _date_normalize($base, $result){    $result = _date_range_limit(0, 60, 60, "s", "i", $result);    $result = _date_range_limit(0, 60, 60, "i", "h", $result);    $result = _date_range_limit(0, 24, 24, "h", "d", $result);    $result = _date_range_limit(0, 12, 12, "m", "y", $result);    $result = _date_range_limit_days(&$base, &$result);    $result = _date_range_limit(0, 12, 12, "m", "y", $result);    return $result;}/** * Accepts two unix timestamps. */function _date_diff($one, $two){    $invert = false;    if ($one > $two) {        list($one, $two) = array($two, $one);        $invert = true;    }    $key = array("y", "m", "d", "h", "i", "s");    $a = array_combine($key, array_map("intval", explode(" ", date("Y m d H i s", $one))));    $b = array_combine($key, array_map("intval", explode(" ", date("Y m d H i s", $two))));    $result = array();    $result["y"] = $b["y"] - $a["y"];    $result["m"] = $b["m"] - $a["m"];    $result["d"] = $b["d"] - $a["d"];    $result["h"] = $b["h"] - $a["h"];    $result["i"] = $b["i"] - $a["i"];    $result["s"] = $b["s"] - $a["s"];    $result["invert"] = $invert ? 1 : 0;    $result["days"] = intval(abs(($one - $two)/86400));    if ($invert) {        _date_normalize(&$a, &$result);    } else {        _date_normalize(&$b, &$result);    }    return $result;}$date = "2014-12-04 19:37:22";echo '<pre>';print_r( _date_diff( strtotime($date), time() ) );echo '</pre>'; ?>

最新文章

123

最新摄影

微信扫一扫

第七城市微信公众平台