Allowing a form field input to echo a variable?_问答_开发者

Allowing a form field input to echo a variable?

开发者 https://www.devze.com 2023-03-27 03:09 出处：网络

Long story short, I want users to be able to call the value of the variable $city_name into a string that they will submit.

相关专题：php

Long story short, I want users to be able to call the value of the variable $city_name into a string that they will submit.

Here's my code;

<?php

if(!isset($post_text)) {
$city_name = "Dallas";
$post_text = $_开发者_如何学PythonPOST['post_text'];
echo($post_text);
}

?>

<html>
<head></head>
<body>
<form action="" method="post">
<input name="post_text" type="text" value="enter text here" />
<input type="submit" value="submit" />
</form>

I was under the impression that calling $city_name in the form field post_text would return "Dallas", unfortunately that's not the case.

If anyone has any advice or information on what alterations I could add to this code in order to allow the user to call the value of $city_name, it would be greatly appreciated :)!!

Based on your comment:

I would like for the user to be able to input and submit a string such as "I am going to $city_name" and have "I am going to Dallas" echoed on submit.

This is the code:

$city_name = "Dallas";
$post_text = str_replace('$city_name', $city_name, $_POST['post_text']);
echo $post_text;

It's important to use single quotes around '$city_name' here as you are searching for the literal text $city_name and not the contents of the variable $city_name.