PHP基础

<?php

if(isset($_REQUEST['test'])){

if((strlen($_REQUEST['test'])<6)){

echo "输入字符长度不能小于6";

}else{

echo "测试成功";

}

}

?>

<from method="POST" action="aaa">

验证测试：<input type="text" name="test" value=""/>(长度不小于6)<br>

<input type="submit" name="submit" value="测试"/>

</from>