10 个救命的 PHP 代码片段-php手册-php.cn

关键词高亮

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

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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); 
 }

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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; 
 }

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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();

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获取短网址

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

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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 $month_diff $year_diff–; 
  
  return $year_diff; 
 }

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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';

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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; 
  } 
  } 
 }

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阻止CSS样式被缓存

 "/stylesheet.css?" rel="stylesheet" type="text/css" /&glt;

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为数字增加 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; 
 }