Allowing a form field input to echo a variable?
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.
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