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～
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25. 解析 XML 数据
A
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 $record->code,'';
}
26. 解析 JSON 数据
27. 获取当前页面 URL 这个 PHP 片段可以帮助你让用户登录后直接跳转到之前浏览的页面
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28. 从任意的 Twitter 账号获取最新的 Tweet
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29. 转发数量 使用这个 PHP 片段可以检测你的页面 URL 有多少转发数量
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30. 计算两个日期的差
/**
- Calculate differences between two dates with precise semantics. Based on PHPs DateTime::diff()
- implementation by Derick Rethans. Ported to PHP by Emil H,2011-05-02. No rights reserved.
- See here for original code:
- http://svn.php.net/viewvc/php/php-src/trunk/ext/date/lib/tm2unixtime.c?revision=302890&view=markup
- http://svn.php.net/viewvc/php/php-src/trunk/ext/date/lib/interval.c?revision=298973&view=markup
/
function _date_range_limit($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
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32. 搜索和高亮字符串中的关键字
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33. 写入文件
34. 根据 URL 下载图片
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35. 检测 URL 是否有效
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36. 生成二维码
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37. 计算两个地图坐标之间的距离
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38. 获取一个特定话题标签的所有 Tweets
$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
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40. 限制文件下载的速度
$download_rate = 20.5;
if(file_exists($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
$lengths = array("60","60","24","7","4.35","12","10");
$now = time();
$unix_date = strtotime($date);
// check validity of dateif(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}";
}
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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