犀利的php代码碎片

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;
}

高亮关键字：

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', '<strong style="background-color:yellow">$1</strong>', $sString);
}

压缩多个CSS：

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();

获取短地址：

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

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;
}

禁止CSS被缓存：

<link href="/stylesheet.css?<?php echo time(); ?>" rel="stylesheet" type="text/css" />

系统维护模式：

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;
        }
    }
}