php数组的遍历函数与方法例子

< ?php
/*
* 我们想要在遍历的过程中改变以下数组中某些元素的值
*/
$people = Array(
Array(’name’ => ‘Kalle’, ’salt’ => 856412),
Array(’name’ => ‘Pierre’, ’salt’ => 215863)
);
for($i = 0; $i < sizeof($people); ++$i)
{
$people[$i]['salt'] = rand(000000, 999999);
}
?>

< ?php
$people = Array(
Array(’name’ => ‘Kalle’, ’salt’ => 856412),
Array(’name’ => ‘Pierre’, ’salt’ => 215863)
);
for($i = 0, $size = sizeof($people); $i < $size; ++$i)
{
$people[$i]['salt'] = rand(000000, 999999);
}
?>

foreach遍历3维数组
 //foreach循环一个3维数组
/*
$biaoge=array(
"市场部"=>array(
array(1,"gaomou1","jingli11",4000),
array(2,"gaomou2","jingli22",4000),
array(3,"gaomou3","jingli33",4000)
 ),
"客服部"=>array(
array(1,"gao1","li11",4000),
array(2,"gao2","li22",4000),
array(3,"gao3","li33",4000)
),
"业务部"=>array(
 array(1,"mou1","jing11",4000),
 array(2,"mou2","jing22",4000),
 array(3,"mou3","jing33",4000)
)
 );
foreach($biaoge as $key=>$value){
echo '<table align="center" width="600" border="1">';
echo '<caption>联系表</caption>';
echo '<tr bgcolor="#dddddd">';
echo '<th>标号</th><th>名字</th><th>职位</th><th>工资</th></tr>';
foreach($value as $row){
if($row%2==0){
$bg="#ffffff";
 }else{
 $bg="#dddddd";
 }
 echo '<tr bgcolor='.$bg.'>';
 foreach($row as $col){
 echo '<td>'.$col.'</td>';
 }
 echo '</tr>';
}
echo '</table>';
 }
echo "<pre>";
print_r($biaoge);
echo "</pre>";

<?php
$contact=array("ID"=>1,"姓名"=>"高某","公司"=>"A公司","地址"=>"北京市");
list($key,$value)=each($contact);           //将each()函数和list()函数联合使用
echo "$key=>$value";                        //输出变量$key和$value，中间使用"=>"分隔
?>

<?php
 //声明一个一维的关联数组$contact
 $contact=array("ID"=>1,
  "姓名"=>"高某",
  "公司"=>"A公司",
  "地址"=>"北京市",
  "电话"=>"(010)987665432",
  "EMAIL"=>"gao@php.com"
 );
 //以HTML列表的方式输出数组中每个元素的信息
 echo '<dl>一个联系人信息：';
 while(list($key,$value) = each($contact) ){      //将foreach语句改写成while,list()和each()的组合
  echo "<dd>$key:$value</dd>";                 //输出每个元素的键/值勤
  }
 echo '</dl>';
?>

<?php  
   echo   date("Y-m-d");  
?>

<?php
#php日期转中文
$str = '2014-10-11';
echo str_replace(str_split('0123456789'), str_split('零一二三四五六七八九',3), date('Y',strtotime($str)).'年'.trim(str_replace('1十','十',implode('十', str_split(date('n',strtotime($str))))),'0').'月'.trim(str_replace('1十','十',implode('十', str_split(date('d',strtotime($str))))),'0')).'日';
?>

#cd /home/php5.2.1/ext/sockets
#/server/php/bin/phpize
#./configure --prefix=/usr/local/php/lib --with-php-config=/server/php/bin/php-config --enable-sockets
#make
#make install

再修改/usr/local/php/etc/php.ini文件
#extension_dir = "/usr/local/php/lib/php/extensions/no-debug-non-zts-20090626/" (php5.4版本以上不用加扩展路径)
extension=sockets.so

//POST提交
function socketPost($url,$data){
$postStr = '';
$postLen = '';
$out = '';
//解析域
$urlInfo = parse_url($url);
$host = $urlInfo['host'];
if(!isset($urlInfo['query'])) $urlInfo['query'] ='';
$path = $urlInfo['path'].'?'.$urlInfo['query'];
//组织数据
foreach($data as $key=>$value){
$postStr .=$key.'='.rawurlencode($value).'&';#这里需要对post的值进行编码，否则会出现中断
}
$postStr = trim($postStr,"&");
 
$postLen = strlen($postStr);
$fp = fsockopen($host, 80, $errno, $errstr, 3);
if ($fp) {
  
$out .="POST ".$path." HTTP/1.0＼r＼n";
$out .="Host: ".$host."＼r＼n";
$out .= "Content-type: application/x-www-form-urlencoded＼r＼n";
$out .= "Content-Length: ".$postLen."＼r＼n";   #这里最好加上Connection: close
$out .= "＼r＼n";
$out .= $postStr;
fwrite($fp, $out);
fclose($fp);

}

}

socketPost("提交的地址",array("username"=>"这里是post的username","password"=>321312312));

function socketGet($url){
$urlInfo = parse_url($url);
$host = $urlInfo['host'];
if(!isset($urlInfo['query'])) $urlInfo['query'] ='';
$path = $urlInfo['path'].'?'.$urlInfo['query'];
$fp = fsockopen($host, 80, $errno, $errstr, 3);
if ($fp) {
//调用模块进行抓取信息
$out = "GET {$path} / HTTP/1.1＼r＼n";
$out .= "Host: {$host}＼r＼n";
$out .= "Connection: Close＼r＼n＼r＼n";
fwrite($fp, $out);
fclose($fp);

}
}

// URL重定向
function redirect($url, $time=0, $msg=”) {
//多行URL地址支持
$url = str_replace(array(“＼n”, “＼r”), ”, $url);
if ( empty($msg) )
$msg = “系统将在{$time}秒之后自动跳转到{$url}！”;
if (!headers_sent()) {
// redirect
if (0 === $time) {
header(‘Location: ‘ . $url);
} else {
header(“refresh:{$time};url={$url}”);
echo($msg);
}
exit();
} else {
$str = “<meta http-equiv=’Refresh’ content=’{$time};URL={$url}’>”;
if ($time != 0)
$str .= $msg;
exit($str);
}
}
 
//url重定向2

function redirect($url) {
echo “<script>”.
“function redirect() {window.location.replace(‘$url’);}＼n”.
“setTimeout(‘redirect();’, 1000);＼n”.
“</script>”;
exit();
}

/**
 * get_redirect_url()
 * Gets the address that the provided URL redirects to,
 * or FALSE if there's no redirect.
 *
 * @param string $url
 * @return string
 */
function get_redirect_url($url){
 $redirect_url = null;
 
 $url_parts = @parse_url($url);
 if (!$url_parts) return false;
 if (!isset($url_parts['host'])) return false; //can't process relative URLs
 if (!isset($url_parts['path'])) $url_parts['path'] = '/';
 
 $sock = fsockopen($url_parts['host'], (isset($url_parts['port']) ? (int)$url_parts['port'] : 80), $errno, $errstr, 30);
 if (!$sock) return false;
 
 $request = "HEAD " . $url_parts['path'] . (isset($url_parts['query']) ? '?'.$url_parts['query'] : '') . " HTTP/1.1rn";
 $request .= 'Host: ' . $url_parts['host'] . "rn";
 $request .= "Connection: Closernrn";
 fwrite($sock, $request);
 $response = '';
 while(!feof($sock)) $response .= fread($sock, 8192);
 fclose($sock);
 
 if (preg_match('/^Location: (.+?)$/m', $response, $matches)){
  return trim($matches[1]);
 } else {
  return false;
 }
 
}
 
/**
 * get_all_redirects()
 * Follows and collects all redirects, in order, for the given URL.
 *
 * @param string $url
 * @return array
 */
function get_all_redirects($url){
 $redirects = array();
 while ($newurl = get_redirect_url($url)){
  if (in_array($newurl, $redirects)){
   break;
  }
  $redirects[] = $newurl;
  $url = $newurl;
 }
 return $redirects;
}
 
/**
 * get_final_url()
 * Gets the address that the URL ultimately leads to.
 * Returns $url itself if it isn't a redirect.
 *
 * @param string $url
 * @return string
 */
function get_final_url($url){
 $redirects = get_all_redirects($url);
 if (count($redirects)>0){
  return array_pop($redirects);
 } else {
  return $url;
 }
}