php数组用法所需要注意的地方
<?
/*
*array (key=>value,key=>value....)
*
*$arr = array(3,5,7,9,6);
*
*/
$arr = array("id"=>2,"title"=>6);
echo $arr[title];
echo "
";
$arr2 = array(3,5,'zifu,hello',7);
print_r($arr2);
echo $arr2[2];
echo "
";
echo "
";
$arr3 =array (array(3,6),array(2,4));
echo "
";
print_r($arr3);
echo "
";
echo $arr3[1][0];
echo "
";
echo "统计字数:";
echo count($arr2);
echo "
";
echo "判断是否数组:";
if (is_array($arr2))
{
echo "是数组";
}else
{
echo "不是数组";
}
echo "
";
echo "破解函数(把值破解成数组):";
$a="1986-1983-1980";
$arr=explode("-",$a);
// print_r($arr);
echo $arr[1];
?>