必须收藏的php实用代码片段

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在编写代码的时候有个神奇的工具总是好的!下面这里收集了 40+ PHP 代码片段,可以帮助你开发PHP 项目。 之前已经为大家分享了《必须收藏的23个PHP实用代码片段》。 这些PHP 片段对于PHP 初学者也非常有帮助,非常容易学习,让我们开始学习吧~

24. 从 PHP 数据创建 CSV 文件

PHP;"> 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;">

25. 解析 XML 数据

PHP;"> $xml_string=" ben A h2o K ";

//load the xml string using simplexml function
$xml = simplexml_load_string($xml_string);

//loop through the each node of molecule
foreach ($xml->molecule as $record)
{
//attribute are accessted by
echo $record['name'],' ';
//node are accessted by -> operator
echo $record->symbol,' ';
echo $record->code,'';
}

26. 解析 JSON 数据

name; //displays rolf echo $obj->office[0]; //displays google

27. 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

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

语法:

PHP;">

28. 从任意的 Twitter 账号获取最新的 Tweet

getName() == "content") { $content = $value . ""; echo '

'; } } } }

语法:

29. 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

story->url_count; if($retweets){ return $retweets; } else { return 0; } }

语法:

30. 计算两个日期的差

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(31,31,29,30,31);
    $days_in_month = array(31,28,31);
    _date_range_limit(1,13,12,"m","y",&$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)
    {
    $result = _date_range_limit(0,60,"s","i",$result);
    $result = _date_range_limit(0,"h",24,"d",$result);
    $result = _date_range_limit_days(&$base,&$result);
    $result = _date_range_limit(0,$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","s");
    $a = array_combine($key,array_map("intval",explode(" ",date("Y m d H i s",$one))));
    $b = array_combine($key,$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;
    }
    $date = "2014-12-04 19:37:22";
    echo '
    ';
    print_r( _date_diff( strtotime($date),time() ) );
    echo '
    ';
    ?>

31. 删除文件夹内容

语法:

32. 搜索和高亮字符串中的关键字

$1",$text ); } return $text; }

语法:

33. 写入文件

34. 根据 URL 下载图片

语法:

35. 检测 URL 是否有效

语法:

36. 生成二维码

"http://","TEL" => "TEL:","TXT"=>"","EMAIL" => "MAILTO:"); if(!in_array($type,array("URL","TEL","TXT","EMAIL"))) { $type = "TXT"; } if (!preg_match('/^'.$types[$type].'/',$data)) { $data = str_replace("\\","",$types[$type]).$data; } $ch = curl_init(); $data = urlencode($data); curl_setopt($ch,CURLOPT_URL,'http://chart.apis.google.com/chart'); curl_setopt($ch,CURLOPT_POST,true); curl_setopt($ch,CURLOPT_POSTFIELDS,'chs='.$size.'x'.$size.'&cht=qr&chld='.$ec.'|'.$margin.'&chl='.$data); curl_setopt($ch,false); curl_setopt($ch,CURLOPT_TIMEOUT,30); $response = curl_exec($ch); curl_close($ch); return $response; }

语法:

37. 计算两个地图坐标之间的距离

语法:

40.770623,'long' => -73.964367); $point2 = array('lat' => 40.758224,'long' => -73.917404); $distance = getDistanceBetweenPointsNew($point1['lat'],$point1['long'],$point2['lat'],$point2['long']); foreach ($distance as $unit => $value) { echo $unit.': '.number_format($value,4).''; } ?>

38. 获取一个特定话题标签的所有 Tweets

Connecting to

$url

...

"; $ch = curl_init($url); curl_setopt ($ch,TRUE); $xml = curl_exec ($ch); curl_close ($ch); //If you want to see the response from Twitter,uncomment this next part out: //echo "

Response:

"; //echo "
".htmlspecialchars($xml)."
"; $affected = 0; $twelement = new SimpleXMLElement($xml); foreach ($twelement->entry as $entry) { $text = trim($entry->title); $author = trim($entry->author->name); $time = strtotime($entry->published); $id = $entry->id; echo "

Tweet from ".$author.":

".$text."

Posted ".date('n/j/y g:i a',$time)."

"; } return true ; }

39. 添加 th,st,nd 或者 rd 作为数字的后缀

4) ? 'th' : (($test_c < 4) ? ($test_c < 3) ? ($test_c < 2) ? ($test_c < 1) ? 'th' : 'st' : 'nd' : 'rd' : 'th')); return $cdnl.$ext; }

语法:

40. 限制文件下载的速度

// set the download rate limit (=> 20,5 kb/s)
$download_rate = 20.5;
if(file_exists($local_file) && is_file($local_file)) {
// send headers
header('Cache-control: private');
header('Content-Type: application/octet-stream');
header('Content-Length: '.filesize($local_file));
header('Content-Disposition: filename='.$download_file);

// flush content
flush();
// open file stream
$file = fopen($local_file,"r");
while(!feof($file)) {

// send the current file part to the browser
print fread($file,round($download_rate * 1024));  

// flush the content to the browser
flush();

// sleep one second
sleep(1);  

}

// close file stream
fclose($file);}
else {
die('Error: The file '.$local_file.' does not exist!');
}
?>

41. 把文本转换成图片

42. 获取远程文件的大小

语法

43. 使用 imagebrick 进行 pdf 到图像的转换

44. 使用 tinyurl 生成短网址

46. Facebook 样式的时间戳

$periods = array("second","minute","hour","day","week","month","year","decade");
$lengths = array("60","60","24","7","4.35","12","10");

$now = time();
$unix_date = strtotime($date);

// check validity of date

if(empty($unix_date)) {
return "Bad date";
}
// is it future date or past date
if($now > $unix_date) {
$difference = $now - $unix_date;
$tense = "ago";

} else {
$difference = $unix_date - $now;
$tense = "from now";
}

for($j = 0; $difference >= $lengths[$j] && $j < count($lengths)-1; $j++) {
$difference /= $lengths[$j];
}

$difference = round($difference);

if($difference != 1) {
$periods[$j].= "s";
}

return "$difference $periods[$j] {$tense}";
}

语法:

PHP;">

以上就是本文的全部内容,希望对大家的学习有所帮助。

原文链接:https://www.f2er.com/php/20422.html

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