教程集 > 脚本编程 > php > 正文 php开发中实用的PHP代码片段

php开发中实用的PHP代码片段

发布时间：2016-10-26 编辑：jiaochengji.com

教程集为您提供php开发中实用的PHP代码片段等资源，欢迎您收藏本站，我们将为您提供最新的php开发中实用的PHP代码片段资源

下面我们一起来看我整理了在php开发中一些常用的php函数整理，希望这些函数代码地各位同学同样有帮助哦。

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', '<strong style="background-color:yellow">$1</strong>', $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) {
  $consonants .= '23456789';
} www,jquerycn.cn
if ($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("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();

5.获取短网址

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){ www.jiaochengji.com

        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

if( $last == 1 && $seclast == 1) $ext = 'th';
if( $last == 2 && $seclast == 1) $ext = 'th';
if( $last == 3 && $seclast == 1) $ext = 'th';

return $rank.$ext;
}

通过IP判断来源

这是一个非常实用的代码片段，可以帮助你通过IP来判断访客来源。下面的方法通过接收一个参数，然后返回IP所在地点。如果没有找到，则返回UNKNOWN。

<table width="620" align="center" border="0" cellpadding="1" cellspacing="1" style="background:#FB7"> <tr> <td width="464" height="27" bgcolor="#FFE7CE"> 代码如下</td> <td width="109" align="center" bgcolor="#FFE7CE" style="cursor:pointer;" onclick="doCopy('copy5381')">复制代码</td> </tr> <tr> <td height="auto" colspan="2" valign="top" bgcolor="#FFFFFF" style="padding:10px;" class="copyclass" id=copy5381>function detect_city($ip) {

        $default = 'UNKNOWN';

        if (!is_string($ip) || strlen($ip) < 1 || $ip == '127.0.0.1' || $ip == 'localhost')
            $ip = '8.8.8.8';

        $curlopt_useragent = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2) Gecko/20100115 Firefox/3.6 (.NET CLR 3.5.30729)';

        $url = 'http://ipinfodb.com/ip_locator.php?ip=' . urlencode($ip);
        $ch = curl_init();

        $curl_opt = array(
            CURLOPT_FOLLOWLOCATION => 1,
            CURLOPT_HEADER      => 0,
            CURLOPT_RETURNTRANSFER => 1,
            CURLOPT_USERAGENT   => $curlopt_useragent,
            CURLOPT_URL       => $url,
            CURLOPT_TIMEOUT         => 1,
            CURLOPT_REFERER         => 'http://' . $_SERVER['HTTP_HOST'],
        );

        curl_setopt_array($ch, $curl_opt);

        $content = curl_exec($ch);

        if (!is_null($curl_info)) {
            $curl_info = curl_getinfo($ch);
        }

        curl_close($ch);

        if ( preg_match('{<li>City : ([^<]*)</li>}i', $content, $regs) ) {
            $city = $regs[1];
        }
        if ( preg_match('{<li>State/Province : ([^<]*)</li>}i', $content, $regs) ) {
            $state = $regs[1];
        }

        if( $city!='' && $state!='' ){
          $location = $city . ', ' . $state;
          return $location;
        }else{
          return $default;
        }

    }

判断一张图片的主色调

下面这个代码非常实用，能帮助你判断一张图片中的主色调，你可以分析任何图片。

不显示PHP错误而发送电子邮件取代之

如果你不想在页面中显示PHP错误，也可以通过email来获取错误信息。下面的代码可以帮助你实现。

<table width="620" align="center" border="0" cellpadding="1" cellspacing="1" style="background:#FB7"> <tr> <td width="464" height="27" bgcolor="#FFE7CE"> 代码如下</td> <td width="109" align="center" bgcolor="#FFE7CE" style="cursor:pointer;" onclick="doCopy('copy8321')">复制代码</td> </tr> <tr> <td height="auto" colspan="2" valign="top" bgcolor="#FFFFFF" style="padding:10px;" class="copyclass" id=copy8321><?php

// Our custom error handler
function nettuts_error_handler($number, $message, $file, $line, $vars){
    $email = "
        <p>An error ($number) occurred on line
        <strong>$line</strong> and in the <strong>file: $file.</strong>
        <p> $message </p>";

    $email .= "<pre>" . print_r($vars, 1) . "</pre>";

    $headers = 'Content-type: text/html; charset=iso-8859-1' . "rn";

    // Email the error to someone...
    error_log($email, 1, 'you@youremail.com', $headers);

    // Make sure that you decide how to respond to errors (on the user's side)
    // Either echo an error message, or kill the entire project. Up to you...
    // The code below ensures that we only "die" if the error was more than
    // just a NOTICE.
    if ( ($number !== E_NOTICE) && ($number < 2048) ) {
        die("There was an error. Please try again later.");
    }
}

// We should use our custom function to handle errors.
set_error_handler('nettuts_error_handler');

// Trigger an error... (var doesn't exist)
echo $somevarthatdoesnotexist;

您可能感兴趣的文章：
php下载css中图片函数
 php绘图不显示图片怎么办
 php开发环境是什么
 PHP开发框架的现状和展望
 php编程好学吗
 php gd库实现服务端图片裁剪与缩略图
 用最快的速度在 PHP 语言下实现验证码功能
 PHP是什么-PHP的架构及原理概述
 php生成动态图片验证码的一段代码
 windows下开启PHP GD库的方法

上一篇：PHP利用curl函数后台远程登录正方教务系统下一篇：php 判断空数组程序代码

[关闭]

php开发中实用的PHP代码片段

最近更新

浏览排行