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PHP: “Notice: Undefined variable” and “Notice: Undefined index”PHP错误:未定义指数:提交
在这一次的点击提交按钮从数据库中检索数据。但是一旦我进入这个页面未定义索引:提交显示在我点击提交按钮之前。
<div id="title">
<form method="get" action="<?php echo $_SERVER['PHP_SELF']?>">
<h3>Select your product and click submit</h3><br />
<select name="prod">
<option value="default">Select your product</option>
<option value="os">Operating Systems</option>
<option value="mobile">Smart Mobiles</option>
<option value="mobile">Computers</option>
<option value="shirt">Shirts</option>
</select><br /><br />
<input type="submit" value="Submit" name="submit"/>
</form>
PHP代码为:
<?php
$submitcheck=$_GET['submit'];
echo $submitcheck;
if (!isset($submitcheck)) {
echo 'Pls select and submit';
} else {
....
}
>
thnq杰米..有助于为我愚蠢的追求 – Bright