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    ▪php获取数组最后一个值的三种方法      本节内容： php获取数组最后一个值 要求： 对取出的数组要获取数组的最后健或值。 本文为大家分享三种实现方法，有兴趣的朋友可以研究下。 例子：   代码示例: <?php  $array=array(1,2,.........

    ▪php获取数组第一个值的方法      本节内容： php获取数组第一个值 1，reset (PHP 3, PHP 4, PHP 5) reset -- 将数组的内部指针指向第一个单元 说明 mixed reset ( array &array ) reset() 将 array 的内部指针倒回到第一个单元并返回第一个.........

    ▪php fsockopen模拟POST提交的代码      本节内容： fsockopen模拟POST提交数据。 例子：   代码示例: <?php /* * fsockopen模拟POST方式提交数据 * edit: www. */ $URL =‘ http : //xxx.xxx.xxx.xx/xx/xxx/top.php'; $post_data [ ' clientname ' ] = " test08 " ; .........

代码示例:

<?php 
$array=array(1,2,3,4,5); 
echo $array[count($array)-1];//计算数组长度，然后获取数组最后一个元素，如果数组中最后一个元素含有非数字键名，结果可能跟预期不符合 
//适用于键名为数字的数组 
echo '<br>';  // www.
echo end($array);//将数组的内部指针指向最后一个单元，适用于所有数组 
echo '<br>'; 
rsort($array);//对数组逆向排序，如果数组中含有字母或汉字，结果可能不符合预期，最适用于数字数组 
echo $array[0]; 
?> 

代码示例:

<?php
 $array = array('step one', 'step two', 'step three', 'step four');
 // by default, the pointer is on the first element
 echo current($array) . "<br />\n"; // "step one"
 // skip two steps
 next($array);
 next($array);
 echo current($array) . "<br />\n"; // "step three"
 // reset pointer, start again on step one
 reset($array);
 echo current($array) . "<br />\n"; // "step one"
?>

代码示例:

<?php
$transport = array('foot', 'bike', 'car', 'plane');
$mode = current($transport); // $mode = 'foot';
$mode = next($transport);    // $mode = 'bike';
$mode = next($transport);    // $mode = 'car';
$mode = prev($transport);    // $mode = 'bike';
// www.
$mode = end($transport);     // $mode = 'plane';
?>

代码示例:

<?php
 $transport = array('foot', 'bike', 'car', 'plane');
 $mode = current($transport); // $mode = 'foot';
 $mode = next($transport);    // $mode = 'bike';
 $mode = current($transport); // $mode = 'bike';
 $mode = prev($transport);    // $mode = 'foot';
 $mode = end($transport);     // $mode = 'plane';
 $mode = current($transport); // $mode = 'plane';
?>

代码示例:

<?php
/*
* fsockopen模拟POST方式提交数据
* edit: www.
*/
$URL =‘ http : //xxx.xxx.xxx.xx/xx/xxx/top.php';
$post_data [ ' clientname ' ] = " test08 " ;
$post_data [ ' clientpasswd ' ] = " test08 " ;
$post_data [ ' submit ' ] = " ログイン " ;
$referrer = "" ;
// parsing the given URL
$URL_Info = parse_url ( $URL ) ;
// Building referrer
if ( $referrer == "" ) // if not given use this script as referrer
$referrer = $_SERVER [ " SCRIPT_URI " ] ;
 
// making string from $data
foreach ( $post_data as $key => $value )
$values [] = " $key = " . urlencode ( $value ) ;
 
$data_string = implode ( " & " , $values ) ;
// Find out which port is needed - if not given use standard (=80)
if ( ! isset() ( $URL_Info [ " port " ]))
$URL_Info [ " port " ] = 80 ;
// building POST-request:
$request .= " POST " . $URL_Info [ " path " ] . " HTTP/1.1 /n " ;
$request .= " Host: " . $URL_Info [ " host " ] . " /n " ;
$request .= " Referer: $referrer /n " ;
$request .= " Content-type: application/x-www-form-urlencoded /n " ;
$request .= " Content-length: " . strlen ( $data_string ) . " /n " ;
$request .= " Connection: close /n " ;
$request .= " /n " ;
$request .= $data_string . " /n " ;
$fp = fsockopen ( $URL_Info [ " host " ] , $URL_Info [ " port " ]) ;
fputs ( $fp , $request ) ;
while ( ! feof ( $fp )) {
     $result .= fgets ( $fp , 128 ) ;
}
fclose($fp);