我正在进行表单验证,我正在对我的代码进行一些调试。我将在下面插入必要的代码片段:
表格代码:
echo '<h1> Seismic Recording </h1>
<div>
<form action="validate2.php" method="POST">';
echo "Latitude: <input type='text' name='latitude'>";
echo "Longitude: <input type='text' name='longitude'required>";
echo 'Wave Type: <select id="wave_type" name="wave_type" required>
<option selected value="s">S</option>
<option value="p">P</option>
<option value="surface_wave">Surface Wave</option>
</select>';
echo "Wave Value: <input type='text' name='wave_value' required>";
echo 'Upload CSV File: <input type="file" name="file">';
echo " <input type='submit' name='submit' value='submit'>";
echo "</form>
</div> ";
验证码:
echo "w";
if (isset($_POST['submit'])) {
echo "t";
$latitude = $_POST['latitude'];
if ($latitude == NULL) {
echo "Please insert a latitude . <br>";
$error = $error + 1;
}
}
echo "q";
我在if语句中放置的表单验证不起作用。我尝试通过插入'echo“q”'和'echo“w”'来调试代码,以查看问题所在。这些陈述起作用(它们输出字符)。但if语句中的'echo“t”'不起作用。为什么会这样?
var_dump($ _ POST)的结果:
array(5){[“latitude”] =&gt; string(0)“”[“longitude”] =&gt; string(1)“g” [ “wave_type”] =&GT; string(1)“s”[“wave_value”] =&gt; string(1)“g” [ “文件”] =&GT; string(0)“”}
我的问题不在于获得验证的范围,而是为什么'echo t'不起作用?
答案 0 :(得分:0)
为什么在使用纬度时检查'submit'post变量?
if(isset($_POST['latitude']))
{
echo "t";
$latitude=$_POST['latitude'];
}
else
{
echo "Please insert a latitude . <br>";
$error = $error + 1;
}
此外,提交按钮
上不需要名称<input type="submit" value="Submit">
答案 1 :(得分:0)
<!--form code start-->
<?php
if(isset($_REQUEST['req']))
{
echo "Please enter any input";
}
?>
<form action="validate2.php" method="POST">
Latitude: <input type='text' name='latitude'>
<input type='submit' name='submit' value='submit'>
</form>
<!--validate2.php code start-->
<?php
if (isset($_POST['submit']))
{
$latitude = $_POST['latitude'];
if ($latitude == NULL)
{
header("Location:frm.php?req=error");
}
else
{
echo "Your input Text is: ".$latitude;
}
}
?>
答案 2 :(得分:0)
你的表格渲染搞砸了,这很有效:
echo "<h1> Seismic Recording </h1>";
echo "<div>";
echo "<form action='' method='POST'>";
echo "Latitude: <input type='text' name='latitude'>";
echo "Longitude: <input type='text' name='longitude'd>";
echo 'Wave Type: <select id="wave_type" name="wave_type">';
echo '<option selected value="s">S</option>';
echo '<option value="p">P</option>';
echo '<option value="surface_wave">Surface Wave</option>';
echo "</select>";
echo "Wave Value: <input type='text' name='wave_value' d>";
echo 'Upload CSV File: <input type="file" name="file">';
echo "<input type='submit' name='submit' value='submit'>";
echo "</form>";
echo "</div>";
if(isset($_POST)){
if(isset($_POST['submit'])){
echo "Submit is alive!!";
}
}
为了避免这种问题,请记住,你可以用这种方式写简单的html:
<?php
//Mi php code blablabla
?>
/* My html code */
<h1>Wonderful day, isn't it?<h1>
<?php
//Another php tasks and etc
?>
答案 3 :(得分:0)
<!--Second Method-->
<!--form code start-->
<form action="validate2.php" method="POST">
Latitude: <input type='text' name='latitude'>
<input type='submit' name='submit' value='submit'>
</form>
<!--validate2.php code start-->
<?php
if (isset($_POST['submit']))
{
$latitude = $_POST['latitude'];
if ($latitude == NULL)
{
echo '<script>alert("Please enter any input");
window.location.href="frm.php";</script>';
}
else
{
echo "Your input Text is: ".$latitude;
}
}
?>
答案 4 :(得分:0)
试试这个: -
$curl_connection =
curl_init('http://www.domainname.com/target_url.php');
链路: - http://www.html-form-guide.com/php-form/php-form-submit.html