php array traversal skills

$teacher = ['id'=>1001, 'name'=>'peter zhu', 'salary'=> 3000, 'course'=>'php'];

for ($i=0; $i',current($teacher),'
'; next($teacher); } echo '
';

reset($teacher); $i = 0; while ($i',current($teacher),'
'; next($teacher); $i++; } echo '
'; //foreach($arr as $key=>$value):数组专用的遍历语法结构 echo '
讲师信息
'; echo '
'; foreach ($teacher as $key => $value) { echo '
'.$key.':'.$value.'
'; } echo '
'; echo '
'; //如果只对值感兴趣 echo ''; echo ''; echo ''; echo ''; foreach ($teacher as $value) { echo ''; } echo ''; echo '
讲师信息表
ID
姓名
工资
课程
'.$value.'
'; echo '
';

$years = range(1980, 2000); echo ''; foreach ($years as $value) { echo ''.$value.'年'; } echo ''; echo ' ';

$months = range(1, 12); echo ''; foreach ($months as $value) { echo ''.sprintf("%02d",$value) .'月'; } echo ''; echo ' ';

$days = range(1, 31); echo ''; foreach ($days as $value) { echo ''.sprintf("%02d",$value) .'日'; } echo ''; echo ' '; echo '提交';