php开发中实用的PHP代码片段

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);
}

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);
}

function generatePassword($length=9, $strength=0) {
 $vowels = 'aeuy';
 $consonants = 'bdghjmnpqrstvz';
 if ($strength >= 1) {
  $consonants .= 'BDGHJLMNPQRSTVWXZ';
 }
 if ($strength >= 2) {
  $vowels .= "AEUY";
 }
 if ($strength >= 4) {
  $consonants .= '23456789';
 } www,111cn.net
 if ($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;
}

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("rn", "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();

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;
}

//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){  www.111cn.net

        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;
        }
    }
}

<link href="/stylesheet.css?<?php echo time(); ?>" rel="stylesheet" type="text/css" /&glt;10.数字增加 stndrd 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;
}

public function index(){
  $ch = curl_init();
  curl_setopt($ch, CURLOPT_URL, $url); //填对于的URL就可以了
  curl_setopt($ch, CURLOPT_HEADER, 0);
  curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)");
  curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file); //主要cookie的路径，本保存页面cookie
  curl_setopt($ch, CURLOPT_RETURNTRANSFER,1); //返回结果自动输出
  $response = curl_exec($ch);
  curl_close($ch);
    }

<img src="xxxx/CheckCode.aspx" />

public function getImg()
    {
        $url = "http://xxxx/CheckCode.aspx";
        $filedir = SITE_PATH."/TMP/Cookies";
        $cookie_file =  $filedir."/cookie.txt";
        $ch = curl_init();  www.111cn.net
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)");
        curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file); //
        curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
        curl_setopt($ch, CURLOPT_TIMEOUT, "10");
        header("Content-type:image/gif"); //这个视不同图片格式不一样，请注意
        echo  curl_exec($ch);
        curl_close($ch);
    }

<?php
/**
 * PHP获取路径或目录实现
 * @link http://www.111cn.net
 */
 
//魔术变量，获取当前文件的绝对路径
echo "__FILE__:  ========>  ".__FILE__; 
echo '<br/>';
 
//魔术变量，获取当前脚本的目录
echo "__DIR__:  ========>  ".__DIR__;
echo '<br/>';
 
//dirname返回路径的目录部分,dirname(__FILE__)相当于__DIR__
echo "dirname(__FILE__):  ========>  ".dirname(__FILE__);
echo '<br/>';
 
//$_SERVER['PHP_SELF']和$_SERVER['SCRIPT_NAME']的结果一般相同，他们都是获取当前脚本的文件名
//只有当php以cgi方式运行时有区别，但是现在几乎找不到以cgi方式运行php了
echo '$_SERVER["PHP_SELF"]:  ========>  '.$_SERVER['PHP_SELF'];
echo '<br/>';
 
echo '$_SERVER["SCRIPT_NAME"]:  ========>  '.$_SERVER['SCRIPT_NAME'];
echo '<br/>';
 
//当前执行脚本的绝对路径。记住，在CLI方式运行php是获取不到的
echo '$_SERVER["SCRIPT_FILENAME"]:  ========>  '.$_SERVER['SCRIPT_FILENAME'];
echo '<br/>';
 
//当前运行脚本所在的文档根目录。在服务器配置文件中定义。
echo '$_SERVER["DOCUMENT_ROOT"]:  ========>  '.$_SERVER['DOCUMENT_ROOT'];
echo '<br>';
 
//getcwd()返回当前工作目录
echo "getcwd():  ========>  ".getcwd();
echo '<br>';
 
echo '<br>';
echo "php教程(www.111cn.net)整理";