PHP二维数组按照一个字段排序程序

foreach($arr as $vo){ 
    $t[] = $vo['clicks']; 
} 
array_multisort($t, $arr);//排序 
var_dump($arr); 

<?
$str = "Is your name O&#39;reilly?";

// 输出：Is your name O''&#39;reilly?
echo addslashes($str);
?>

<?php
// 如果启用了魔术引号
echo $_POST['lastname'];             // O'reilly
echo addslashes($_POST['lastname']); // O\'reilly

// 适用各个 PHP 版本的用法
if (get_magic_quotes_gpc()) {
    $lastname = stripslashes($_POST['lastname']);
}
else {
    $lastname = $_POST['lastname'];
}

// 如果使用 MySQL
$lastname = mysql_real_escape_string($lastname);

echo $lastname; // O'reilly
$sql = "INSERT INTO lastnames (lastname) VALUES ('$lastname')";
?>

if (!isset( $HTTP_RAW_POST_DATA ) ) {  
    $HTTP_RAW_POST_DATA = file_get_contents('php://input');  
}  
 
// fix for mozBlog and other cases where xml isn't on the very first line  
if ( isset($HTTP_RAW_POST_DATA) )  
    $HTTP_RAW_POST_DATA = trim($HTTP_RAW_POST_DATA); 

“php://input allows you to read raw POST data. It is a less memory intensive alternative to $HTTP_RAW_POST_DATA and does not need any special php.ini directives. php://input is not available with enctype=”multipart/form-data”.

<?php
//@file phpinput_server.php
$raw_post_data = file_get_contents('php://input', 'r');
echo "-------$_POST------------------n";
echo var_dump($_POST) . "n";
echo "-------php://input-------------n";
echo $raw_post_data . "n";
?>
?
<?php
//@file phpinput_post.php
$http_entity_body = 'n=' . urldecode('perfgeeks') . '&amp;p=' . urldecode('7788');
$http_entity_type = 'application/x-www-form-urlencoded';
$http_entity_length = strlen($http_entity_body);
$host = '192.168.0.6';
$port = 80;
$path = '/phpinput_server.php';
$fp = fsockopen($host, $port, $error_no, $error_desc, 30);
if ($fp) {
  fputs($fp, "POST {$path} HTTP/1.1rn");
  fputs($fp, "Host: {$host}rn");
  fputs($fp, "Content-Type: {$http_entity_type}rn");
  fputs($fp, "Content-Length: {$http_entity_length}rn");
  fputs($fp, "Connection: closernrn");
  fputs($fp, $http_entity_body . "rnrn");
?
  while (!feof($fp)) {
    $d .= fgets($fp, 4096);
  }
  fclose($fp);
  echo $d;
}
?>

@php /phpinput_post.phpHTTP/1.1 200 OK
Date: Thu, 08 Apr 2010 03:23:36 GMT
Server: Apache/2.2.3 (CentOS)
X-Powered-By: PHP/5.1.6
Content-Length: 160
Connection: close
Content-Type: text/html; charset=UTF-8
-------$_POST------------------
array(2) {
  ["n"]=> string(9) "perfgeeks"
  ["p"]=> string(4) "7788"
}
-------php://input-------------
n=perfgeeks&p=7788通过ngrep抓到的http请求包如下:

T 192.168.0.8:57846 -> 192.168.0.6:80 [AP]
  POST /phpinput_server.php HTTP/1.1..
  Host: 192.168.0.6..Content-Type: application/x-www-form-urlencoded..Co
  ntent-Length: 18..Connection: close....n=perfgeeks&p=7788....

<?php
//@file phpinput_xmlrpc.php
$http_entity_body = "nn   jt_userinfon";
$http_entity_type = 'text/html';
$http_entity_length = strlen($http_entity_body);
$host = '192.168.0.6';
$port = 80;
$path = '/phpinput_server.php';
$fp = fsockopen($host, $port, $error_no, $error_desc, 30);
if ($fp) {
  fputs($fp, "POST {$path} HTTP/1.1rn");
  fputs($fp, "Host: {$host}rn");
  fputs($fp, "Content-Type: {$http_entity_type}rn");
  fputs($fp, "Content-Length: {$http_entity_length}rn");
  fputs($fp, "Connection: closernrn");
  fputs($fp, $http_entity_body . "rnrn");
  while (!feof($fp)) {
    $d .= fgets($fp, 4096);
  }
?
  fclose($fp);
  echo $d;
}
?>

@php /phpinput_xmlrcp.phpHTTP/1.1 200 OK
Date: Thu, 08 Apr 2010 03:47:18 GMT
Server: Apache/2.2.3 (CentOS)
X-Powered-By: PHP/5.1.6
Content-Length: 154
Connection: close
Content-Type: text/html; charset=UTF-8

-------$_POST------------------
array(0) {
}

-------php://input-------------
<?xml version="1.0">
<methodcall>
   <name>jt_userinfo</name>
</methodcall>

<?php
//@file phpinput_server.php
$raw_post_data = file_get_contents('php://input', 'r');
echo "-------$_GET------------------n";
echo var_dump($_GET) . "n";
echo "-------php://input-------------n";
echo $raw_post_data . "n";
?>
?
<?php
//@file phpinput_get.php
$query_path = 'n=' . urldecode('perfgeeks') . '&amp;p=' . urldecode('7788');
$host = '192.168.0.6';
$port = 80;
$path = '/phpinput_server.php';
$d = '';
$fp = fsockopen($host, $port, $error_no, $error_desc, 30);
if ($fp) {
  fputs($fp, "GET {$path}?{$query_path} HTTP/1.1rn");
  fputs($fp, "Host: {$host}rn");
  fputs($fp, "Connection: closernrn");
?
  while (!feof($fp)) {
    $d .= fgets($fp, 4096);
  }
  fclose($fp);
  echo $d;
 }
?>

@php /phpinput_get.phpHTTP/1.1 200 OK
Date: Thu, 08 Apr 2010 07:38:15 GMT
Server: Apache/2.2.3 (CentOS)
X-Powered-By: PHP/5.1.6
Content-Length: 141
Connection: close
Content-Type: text/html; charset=UTF-8

-------$_GET------------------
array(2) {
  ["n"]=>
  string(9) "perfgeeks"
  ["p"]=>
  string(4) "7788"
}

-------php://input-------------在这个时候，使用ngrep工具，捕获的相应的http请求数据包如下

T 192.168.0.8:36775 -> 192.168.0.6:80 [AP]
  GET /phpinput_server.php?n=perfgeeks&p=7788 HTTP/1.1..
  Host: 192.168.0.6..Connection: close....

$stateCapitals = array( 
  'Alabama' => 'Montgomery', 
  'Alaska'  => 'Juneau', 
  'Arizona' => 'Phoenix' 
); 
$countryCapitals = array ( 
  'Australia' => 'Canberra', 
  'Austria'   => 'Vienna', 
  'Algeria'   => 'Algiers' 
); 
$capitals = array_merge($stateCapitals, $countryCapitals); 

function capitalize($element) 
{ 
  $element = strtolower($element); 
  return ucwords($element); 
} 
$capitals = array( 
  'Alabama' => 'montGoMEry', 
  'Alaska'  => 'Juneau', 
  'Arizona' => 'phoeniX' 
); 
$capitals = array_map("capitalize", $capitals); 

$capitals = array( 
  'Arizona' => 'Phoenix', 
  'Alaska'  => 'Juneau', 
  'Alabama' => 'Montgomery' 
); 
$state = array_search('Juneau', $capitals); 
// $state = 'Alaska' 

$capitals = array( 
  'Arizona' => 'Phoenix', 
  'Alaska'  => 'Juneau', 
  'Alabama' => 'Montgomery' 
); 
$arrayObject = new ArrayObject($capitals); 
foreach ($arrayObject as $state => $capital) 
{ 
  printf("The capital of %s is %s<br />", $state, $capital); 
} 
// The capital of Arizona is Phoenix 
// The capital of Alaska is Juneau 
// The capital of Alabama is Montgomery

<?php
$sports = array(
    'football' => 'good',
    'swimming' => 'very well',
    'running'  => 'not good'
 );
 
while ($elem = each($sports)) {
    echo $elem['key'].": ".$elem['value']."<br />";
}
?>

程序运行结果：

football: good
swimming: very well
running: not good

<?php
$sports = array(
    'football' => 'good',
    'swimming' => 'very well',
    'running'  => 'not good'
 );
 
while (list($key, $value) = each($sports)) {
    echo $key.": ".$value."<br />";
}
?>

程序运行结果：

football: good
swimming: very well
running: not good

<?php
$arrayHash = array();
foreach($arrayN as $nameN) {
   // 本行执行了 N 次。
   $arrayHash[$nameN] = 1;
}
 

foreach($arrayM as $keyM => $nameM) {
   if (isset($arrayHash[$nameM])) {
   // 本行执行了 M 次！
   unset($arrayM[$keyM]);
   }
}
return $arrayM;
?>

<?
header("Content-type:image/jpeg");
function read_url($str)
{
$file=fopen($str,"r");
while(!feof($file))
{
$result.=fgets($file,9999);
}
fclose($file);
return $result;

}

function save_img($str)
{
$result=read_url($str);
$result=str_replace(""","",$result);
$result=str_replace("'","",$result);

preg_match_all('/<imgssrc=(http://.*?)(s(.*?)>|>)/i',$result,$matches);

foreach($matches[1] as $value)
{
echo $value."<br>n";
//GrabImage($value,$filename="");
}
}

// $url 是远程图片的完整URL地址，不能为空。
// $filename 是可选变量: 如果为空，本地文件名将基于时间和日期
// 自动生成.

function GrabImage($url,$filename="") {
if($url==""):return false;endif;

$path="download/"; //指定存储文件夹

//若文件不存在,则创建;
if(!file_exists($path)){
mkdir($path);
}

if($filename=="") {
$ext=strrchr($url,".");
if($ext!=".gif" && $ext!=".jpg"):return false;endif;
$filename=$path.date("dMYHis").$ext;
}

ob_start();
readfile($url);
$img = ob_get_contents();
ob_end_clean();
$size = strlen($img);

$fp2=@fopen($filename, "a");
fwrite($fp2,$img);
fclose($fp2);

return $filename;
}
save_img("http://www.111cn.net");
?>

 if(!empty($saveremoteimg))
        {
                $body = stripslashes($body);
                $img_array = array();
                preg_match_all("/(src|SRC)=[""|'| ]{0,}(http://(.*).(gif|jpg|jpeg|bmp|png))/isU",$body,$img_array);
                $img_array = array_unique($img_array[2]);
                set_time_limit(0);
                $imgUrl = $img_dir."/".strftime("%Y%m%d",time());
                $imgPath = $base_dir.$imgUrl;
                $milliSecond = strftime("%H%M%S",time());
                if(!is_dir($imgPath)) @mkdir($imgPath,0777);
                foreach($img_array as $key =>$value)
                {
                        $value = trim($value);
                        $get_file = @file_get_contents($value);
                        $rndFileName = $imgPath."/".$milliSecond.$key.".".substr($value,-3,3);
                        $fileurl = $imgUrl."/".$milliSecond.$key.".".substr($value,-3,3);
                        if($get_file)
                        {
                                $fp = @fopen($rndFileName,"w");
                                @fwrite($fp,$get_file);
                                @fclose($fp);
                        }
                        $body = ereg_replace($value,$fileurl,$body);
                }
                $body = addslashes($body);
        }