11个php日惯用的小tips 代码片段

11个php日常用的小tips 代码片段
http://www.phpzag.com/11-useful-code-snippets-for-php-developers/

简单小结下


1 用php的内置csv函数可以很方便生成CSV了，
 

function generateCsv($data, $delimiter = ',', $enclosure = '"') {   $handle = fopen('php://temp', 'r+');   foreach ($data as $line) {		   fputcsv($handle, $line, $delimiter, $enclosure);   }   rewind($handle);   while (!feof($handle)) {		   $contents .= fread($handle, 8192);   }   fclose($handle);   return $contents;}

使用方法：

$data = array( array(1, 2, 4), array('test string', 'test, literal, comma', 'test literal "quotes"'), );echo generateCsv($data);

2 过滤非法输入

<?php function sanitize_input_data($input_data) { $input_data = trim(htmlentities(strip_tags($input_data,“,”))); if (get_magic_quotes_gpc()) $input_data = stripslashes($input_data); .$input_data = mysql_real_escape_string($input_data); return $input_data; } ?>

使用：

<?php $bad_string = “Hi! <script src=’http://www.evilssite.com/bad_script.js’></script> It’s a good day!”; $good_string = sanitize_input_data($bad_string); //OUTPUT:: Hi! It\’s a good day! ?> 

3 unzip文件
php内置了unzip

function unzip_file($file, $destination){	// create object	$zip = new ZipArchive() ;	// open archive	if ($zip->open($file) !== TRUE) {		die (’Could not open archive’);	}	// extract contents to destination directory	$zip->extractTo($destination);	// close archive	$zip->close();	echo 'Archive extracted to directory';}

4 使用 get_meta_tags获取某个网页的meta关键字

$meta = get_meta_tags('http://www.emoticode.net/');$keywords = $meta['keywords'];// Split keywords$keywords = explode(',', $keywords );// Trim them$keywords = array_map( 'trim', $keywords );// Remove empty values$keywords = array_filter( $keywords );print_r( $keywords );

5 判断服务器是否https

if ($_SERVER['HTTPS'] != "on") { 	echo "This is not HTTPS";}else{	echo "This is HTTPS";}

6
显示某个网页的所有源代码

$lines = file('http://google.com/');foreach ($lines as $line_num => $line) { 	// loop thru each line and prepend line numbers	echo "Line #{$line_num} : " . htmlspecialchars($line) . "\n";}

7 使用datauri是很方便把图片等搞成base64的，代码如下：

function data_uri($file, $mime) {  $contents=file_get_contents($file);  $base64=base64_encode($contents);  echo "data:$mime;base64,$base64";}

8 获得某个网页的所有连接

$html = file_get_contents('http://www.example.com');$dom = new DOMDocument();@$dom->loadHTML($html);// grab all the on the page$xpath = new DOMXPath($dom);$hrefs = $xpath->evaluate("/html/body//a");for ($i = 0; $i < $hrefs->length; $i++) {       $href = $hrefs->item($i);       $url = $href->getAttribute('href');       echo $url.'';}

9
让页面的题目变得对于SEO来说更友善 ，

function make_seo_name($title) {	return preg_replace('/[^a-z0-9_-]/i', '', strtolower(str_replace(' ', '-', trim($title))));}

比如有个标题：
"This foo's bar is rockin' cool!";
则输出为：
this-foos-bar-is-rockin-cool

10
下载某个网页上的图片再放到自己的服务器中

$image = file_get_contents('http://www.url.com/image.jpg');file_put_contents('/images/image.jpg', $image); 

11 页面上显示自己facebook的好友数目（对国人来说没啥用）

function fb_fan_count($facebook_name){    $data = json_decode(file_get_contents("https://graph.facebook.com/".$facebook_name));    echo $data->likes;}