Question

在我的PHP程序中，我有2个单选按钮和一个提交按钮。按钮1 =回显EST按钮2 =回显PST。这很好。问题是，在我选择一个选择之前，我的错误价值已经得到了回应。单击提交按钮后如何才能运行脚本？（以下代码）;

<?php
if(isset($_POST['EST'])){
    date_default_timezone_set('America/New_york');
    $today = date("F, l jS Y g:i:s a");
    echo $today;
}else if(isset($_POST['PST'])){
    date_default_timezone_set('America/Los_Angeles');
    $today = date("F, l jS Y g:i:s a");
    echo $today;
}else{
    echo 'Please select a choice!';
}
?>

<form action="index.php" method="POST">
    Select your time zone: <br/>

    EST: <input type="radio" name="EST"/>
    PST: <input type="radio" name="PST"/>
    <br/></br>

    <input type="submit"  value="Submit!" name="submit"/>
</form>

Answer 1

你有两个选择，你可以用isset($_POST['submit'])条件包装整个PHP块（可以用@ jeroen的条件替换或你可以将表单提交给一个单独的处理脚本。

方法1

if(isset($_POST['submit'])) {
    // The submit button (and entire form) has been posted, continue:

    if(isset($_POST['EST'])){
        date_default_timezone_set('America/New_york');
        $today = date("F, l jS Y g:i:s a");
        echo $today;
    }else if(isset($_POST['PST'])){
        date_default_timezone_set('America/Los_Angeles');
        $today = date("F, l jS Y g:i:s a");
        echo $today;
    }else{
        echo 'Please select a choice!';
    }
}

// Form goes here

方法2

form.html

<form action="submit.php" method="POST">
    Select your time zone: <br/>

    EST: <input type="radio" name="EST"/>
    PST: <input type="radio" name="PST"/>
    <br/></br>

    <input type="submit"  value="Submit!" name="submit"/>
</form>

submit.php

<?php
if(isset($_POST['EST'])){
    date_default_timezone_set('America/New_york');
    $today = date("F, l jS Y g:i:s a");
    echo $today;
}else if(isset($_POST['PST'])){
    date_default_timezone_set('America/Los_Angeles');
    $today = date("F, l jS Y g:i:s a");
    echo $today;
}else{
    echo 'Please select a choice!';
}

Answer 2

如果发出POST请求，您只想运行代码的第一部分。所以你应该把它包装成：

if ($_SERVER['REQUEST_METHOD'] === 'POST')
{
  // your php code
}

Answer 3

<?php
if (isset($_POST["submit"])){
    if(isset($_POST['EST'])){
        date_default_timezone_set('America/New_york');
        $today = date("F, l jS Y g:i:s a");
        echo $today;
    }else if(isset($_POST['PST'])){
        date_default_timezone_set('America/Los_Angeles');
        $today = date("F, l jS Y g:i:s a");
        echo $today;
    }else{
        echo 'Please select a choice!';
    }
} else {
?>

FORM

<?php 
}
?>

Answer 4

试试这段代码：

<?php
if(isset($_POST['time_zone'])){
    if ($_POST['time_zone'] == "EST")
    {
        date_default_timezone_set('America/New_york');
        $today = date("F, l jS Y g:i:s a");
        echo $today;
    } else if($_POST['time_zone'] == "PST") {
        date_default_timezone_set('America/Los_Angeles');
        $today = date("F, l jS Y g:i:s a");
        echo $today;
    } else 
        echo 'Please select a choice!';
}
?>

<form action="index.php" method="POST">
    Select your time zone: <br/>

    EST: <input type="radio" name="time_zone" value="EST"/>
    PST: <input type="radio" name="time_zone" value="PST"/>
    <br/></br>

    <input type="submit"  value="Submit!" name="submit"/>
</form>

Answer 5

其他答案都很好，但这样可以得到你想要的结果，而不需要做太多改变。

}else if(isset($_POST['submit'])){
    echo 'Please select a choice!';
}

PHP在返回之前返回False

5 个答案: