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;}