Notice: Use of undefined constant bk - assumed 'bk' in D:\wamp\www\test\check.php on line 4
<?phpsession_start();if($_POST[bk]){echo"check";}?><formaction="check.php"method="pos...
<?php
session_start();
if ($_POST[bk]){
echo "check";
}
?>
<form action="check.php" method="post">
<img src='yanzheng.php'><br>
<input type="text" name="ck">
<input type="submit" value="提交" name="bk">
</form> 展开
session_start();
if ($_POST[bk]){
echo "check";
}
?>
<form action="check.php" method="post">
<img src='yanzheng.php'><br>
<input type="text" name="ck">
<input type="submit" value="提交" name="bk">
</form> 展开
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