How to get a PHP variable value from another PHP file?

Question

how to take the value from another .php file help me fix this:

<html>
<head>
</head>
<body>
    <form name='answer' action="file2.php" method="post">
        <input type="text" name="what">
        <input type="submit" value="Login">
    </form>
    <div><?php echo $answer; ?></div>
</body>
</html>

And the code of file2.php file is as below:

<?php
    if ($_POST['what']==animal){
    $answer="dog";
}else{
    $answer= "not animal";
}

I would like to know how can I get the value of the variable $answer with button, then what should I put at the line :

create a readonly hidden variable. Add the value of $answer and post along with the form. — Tushar Gupta
– Tushar Gupta, Commented Apr 14, 2017 at 22:31
Just include the file and you can access all the variables in it include "file2.php" — Evan Carslake
– Evan Carslake, Commented Apr 14, 2017 at 22:50
You should include the other php file but be careful with variable names so it won't conflict with the main file, also $_post should be $_POST. — Paulo Lima
– Paulo Lima, Commented Apr 14, 2017 at 23:34
FYI, because of a variable name typo, not animal will never be echoed. — mickmackusa
– mickmackusa ♦, Commented Apr 15, 2017 at 1:47
i fix that typo, then what should i do to get that value without go to file2.php page? — Ajun Li
– Ajun Li, Commented Apr 15, 2017 at 7:07

Arturo DT · Accepted Answer · 2017-04-14 23:07:28Z

2

Just use requiere

<?php require 'file2.php'; ?>

answered Apr 14, 2017 at 23:07

Arturo DT

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3 Comments

mickmackusa Over a year ago

This is a low-quality answer because it doesn't say where to put the line (anything at all actually). It doesn't say to replace the current code or anything.

Ajun Li Over a year ago

where i put that code coz i use the button to get the value from file2.php without go to file2.php page?

Arturo DT Over a year ago

Ok, then integrate the php code in the form and change file2.php to action="<?php echo $_SERVER['PHP_SELF']; ?>"

LF-DevJourney · Accepted Answer · 2017-04-15 02:08:29Z

1

Use require_once() to include file2.php in your php file, then in your file you can access the variables in file2.php.

require_once("path of file2.php");

echo $answer;

edited Apr 15, 2017 at 2:08

answered Apr 14, 2017 at 22:55

LF-DevJourney

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5 Comments

Ajun Li Over a year ago

can you give me the example "path of file2.php"?

LF-DevJourney Over a year ago

if your file2.php and the file1.php is in the same dir, then path of file2.php is "./file2.php" or "file2.php". You also can give it the absolute path of file2.php.

Ajun Li Over a year ago

i cant use that for the button, can you share where i place that code?

LF-DevJourney Over a year ago

add this <?php require_once("path of file2.php"); ?> to your file1.php. I cannot do any more, you need do your homework.

Ajun Li Over a year ago

i know your mean sir thanks, but what i ask its get that value without go to page file2.php, sory bad english

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