【Php】数组遍历，foreach, each, trim()

<?php

	$iplist = "122.224.251.154|192.168.2.138|192.168.2.12";

	echo $_SERVER['REMOTE_ADDR'] . "<br/>";

	$arr = explode('|', $iplist);	// 将iplist用'|'分割



	echo "<br/>";

	print_r($arr);

	echo "<br/>";

	foreach($arr as $key => $ip)	// 遍历数组1

	{

		echo "$key = $ip<br/>";

	}



	echo "<br/>";

	reset($arr);					// 重置arr数组指针

	print_r($arr);

	echo "<br/>";

	while (list($key, $val) = each($arr))	// 遍历数组2

	{

		echo "$key = $val<br/>";

	}



	echo "<br/>";

	$str = "    hello world  \n		  ";

	$str = trim($str);				// trim()

	echo "#$str#<br/>";



	echo "<br/>";

	$arr = array(1, 2, array('hello', 'world', 33), 66, 'come on');

	print_r($arr);					// 打印嵌套数组

	echo "<br/>";

	

	echo "<br/>";

	$arr = array(

		'name' => 1,

		'nick' => 2, 

		'arr' => array('hello', 'world', 33),

		66,

		'come on'

		);							// 这种方式的数组相当于json/dict格式了

	print_r($arr);

	echo "<br/>";

?>