Practice [2016.11.05]

/*//写一个函数，产生指定类型长度的验证码
function yzm($lens, $type = 0)
{
$str = ['1234567890',
'abcdefghijklmnopqrstuvwxyz',
'ABCDEFGHIJKLMNOPQRSTUVWXYZ',
'1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
];//定义一个用来获取验证码的数组，该数组拥有各种我们所需要的验证码类型
$str = str_shuffle($str[$type]);
$str = substr($str,0,$lens);
echo $str;
}
yzm(4, 1);
*/


/*//使用任意方式完成三维数组的打印，每组打印成一个表格
$school = [
'iOS'=>[
['name'=>'zhaoo','age'=>20,'sex'=>'Male'],
['name'=>'qian','age'=>21,'sex'=>'Male'],
['name'=>'sun','age'=>22,'sex'=>'Female'],
['name'=>'li','age'=>23,'sex'=>'Female'],
['name'=>'zhou','age'=>24,'sex'=>'Female']
],
'PHP'=>[
['name'=>'wu','age'=>20,'sex'=>'Male'],
['name'=>'zheng','age'=>21,'sex'=>'Male'],
['name'=>'wang','age'=>22,'sex'=>'Female'],
['name'=>'feng','age'=>23,'sex'=>'Female'],
['name'=>'chen','age'=>24,'sex'=>'Female']
]
];
foreach ($schoolas $k => $v) {
echo '<br />';
echo '<table border="1" width="300" align="center" bgcolor="cyan">';
echo '<caption>'.$k.'</caption>';
foreach ($v as $ke => $va) {
if ($ke % 2 == 0) {
echo '<tr bgcolor="gray">';
} else {
echo '<tr bgcolor="pink">';
}
foreach ($va as $key => $value) {
echo '<td align="center">'.$value.'</td>';
}
echo '</tr>';
}
echo '</table>';
echo '<br />';
}
*/