web开发中常用的PHP代码片段

1.关键词高亮

function highlight($sString, $aWords) { if (!is_array ($aWords) || empty ($aWords) || !is_string ($sString)) { return false; } $sWords = implode (‘|’, $aWords); return preg_replace (‘@\b(‘.$sWords.’)\b@si’, ‘$1‘, $sString); }

2.获取你的Feedburner的用户

function get_average_readers($feed_id,$interval = 7){ $today = date(‘Y-m-d’, strtotime(“now”)); $ago = date(‘Y-m-d’, strtotime(“-“.$interval.” days”)); $feed_url=”https://feedburner.google.com/api/awareness/1.0/GetFeedData?uri=".$feed_id."&dates=".$ago.",".$today; $ch = curl_init(); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_URL, $feed_url); $data = curl_exec($ch); curl_close($ch); $xml = new SimpleXMLElement($data); $fb = $xml->feed->entry[‘circulation’]; $nb = 0; foreach($xml->feed->children() as $circ){ $nb += $circ[‘circulation’]; } return round($nb/$interval); }

3.自动生成密码

function generatePassword($length=9, $strength=0) { $vowels = ‘aeuy’; $consonants = ‘bdghjmnpqrstvz’; if ($strength >= 1) { $consonants .= ‘BDGHJLMNPQRSTVWXZ’; } if ($strength >= 2) { $vowels .= “AEUY”; } if ($strength >= 4) { $consonants .= ‘23456789’; } if ($strength >= 8 ) { $vowels .= ‘@#$%’; } $password = ‘’; $alt = time() % 2; for ($i = 0; $i < $length; $i++) { if ($alt == 1) { $password .= $consonants[(rand() % strlen($consonants))]; $alt = 0; } else { $password .= $vowels[(rand() % strlen($vowels))]; $alt = 1; } } return $password; }

4.压缩多个CSS文件

header(‘Content-type: text/css’); ob_start(“compress”); function compress($buffer) { /* remove comments / $buffer = preg_replace(‘!/*[^]*+([^/][^]*+)/!’, ‘’, $buffer); /* remove tabs, spaces, newlines, etc. / $buffer = str_replace(array(“\r\n”, “\r”, “\n”, “\t”, ‘ ‘, ‘ ‘, ‘ ‘), ‘’, $buffer); return $buffer; } / your css files */ include(‘master.css’); include(‘typography.css’); include(‘grid.css’); include(‘print.css’); include(‘handheld.css’); ob_end_flush();

5.获取短网址

function getTinyUrl($url) { return file_get_contents(“http://tinyurl.com/api-create.php?url=".$url); }

6.根据生日计算年龄

function age($date){ $year_diff = ‘’; $time = strtotime($date); if(FALSE === $time){ return ‘’; } $date = date(‘Y-m-d’, $time); list($year,$month,$day) = explode(“-“,$date); $year_diff = date(“Y”) – $year; $month_diff = date(“m”) – $month; $day_diff = date(“d”) – $day; if ($day_diff < 0 || $month_diff < 0) $year_diff–; return $year_diff; }

7.计算执行时间

//Create a variable for start time $time_start = microtime(true); // Place your PHP/HTML/JavaScript/CSS/Etc. Here //Create a variable for end time $time_end = microtime(true); //Subtract the two times to get seconds $time = $time_end - $time_start; echo ‘Script took ‘.$time.’ seconds to execute’;

8.PHP的维护模式

function maintenance($mode = FALSE){ if($mode){ if(basename($_SERVER[‘SCRIPT_FILENAME’]) != ‘maintenance.php’){ header(“Location: http://example.com/maintenance.php"); exit; } }else{ if(basename($_SERVER[‘SCRIPT_FILENAME’]) == ‘maintenance.php’){ header(“Location: http://example.com/"); exit; } } }

9.阻止CSS样式被缓存

10.数字增加 st\nd\rd 等

function make_ranked($rank) { $last = substr( $rank, -1 ); $seclast = substr( $rank, -2, -1 ); if( $last > 3 || $last == 0 ) $ext = ‘th’; else if( $last == 3 ) $ext = ‘rd’; else if( $last == 2 ) $ext = ‘nd’; else $ext = ‘st’; if( $last == 1 && $seclast == 1) $ext = ‘th’; if( $last == 2 && $seclast == 1) $ext = ‘th’; if( $last == 3 && $seclast == 1) $ext = ‘th’; return $rank.$ext; }