php的知識

javascript中寫php:javascript

<script language="javascript">php

function check(){java

<?phppost

if($_SESSION["id"]){spa

?>orm

alert('您已登陸!');ip

<?php }  else {?>input

alert('請登錄');it

<?php } ?>io

}

</script>

PHP上傳文件:

<form method="post" name="form" action="" enctype="multipart/form-data">
<input name="userfile[]" type="file">
<input type="submit" value="提交">
</form>

<?php

$uploaddir = '/upload/';
$uploadfile = $uploaddir . basename($_FILES['userfile']['name']);

if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) { echo "File is valid, and was successfully uploaded./n";} else { echo "Possible file upload attack!/n";}?>

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