Execute function on php

Question

I recently start the php programming. However, I encountered a problem about running a function on php file. My php file is listed as follows:

<html>
<head>
    <meta http-equiv="content-type" content="text/html" />
    <meta name="author" content="aaaaa" />

    <title>Untitled 3</title>
</head>

<body>

<form method="post" action="Test()" >
<input type="submit" name="submit" value="submit"/>

</form>

<?php
echo "Hello";
function Test()
{
    echo "Goodbye";
}
?>

</body>
</html>

After running the program, a webpage is observed with A button entitled submit and the word "Hello". However, After click on the button, the webpage "This page cannot be displayed" is observed. But I respect the word "Goodbye" is shown. I transferred the php code to another file, but the problem was not resolved.

another 132 points on the php tag @chris85 and you'll be able to close those off in one go ;-) bet you can't wait! *lol* — Funk Forty Niner, Feb 23 '17 at 19:22
after seeing a comment you left in one of the answers being *"However, the webpage "This page can't be displayed" is again observed."*, I'm thinking you're trying to run this as `file:///` rather than a host. — Funk Forty Niner, Feb 23 '17 at 19:31
I am writing the code and runing it the phpDesigner 8. I set the localhost in a folder in my computer. — Mohammad Tahaye Abadi, Feb 23 '17 at 19:38

score 1 · Answer 1 · edited Feb 23 '17 at 19:40

1

actions in forms aren't functions like JavaScript. You are trying to run Test() on submit which isn't a thing. What you want is action to be action=" "

In reality you should be doing something like this:

<html>
<head>
    <meta http-equiv="content-type" content="text/html" />
    <meta name="author" content="aaaaa" />

    <title>Untitled 3</title>
</head>

<body>

<form method="post" action="" >
<input type="submit" name="submit" value="submit"/>
</form>
<?php
    echo "Hello";

if(isset($_POST['submit'])){
    echo "Goodbye";
}

?>

</body>
</html>

If you WANT to use a function....

<html>
<head>
    <meta http-equiv="content-type" content="text/html" />
    <meta name="author" content="aaaaa" />

    <title>Untitled 3</title>
</head>

<body>

<form method="post" action="" >
<input type="submit" name="submit" value="submit"/>
</form>
<?php
    echo "Hello";

function test(){
   echo "Goodbye";
}

if(isset($_POST['submit'])){
    test();
}

?>

</body>
</html>

Lets say he file name is test.php where you have put all your code so the action values should be test.php

<form method="post" action="test.php" >

edited Feb 23 '17 at 19:40

KB5

128
3
12

answered Feb 23 '17 at 19:18

clearshot66

2,292
1
8
17

You're theoretically correct, but what about the function they wish to use; what happens to that? – Funk Forty Niner Feb 23 '17 at 19:22
I'll edit it, but there's no need for a function in this instance.. – clearshot66 Feb 23 '17 at 19:25
*"no need for a function in this instance"* - Yeah but what if they "want" to use a function, along with a probable JS method with ajax etc.? We don't really know what's going on in other people's heads ;-) – Funk Forty Niner Feb 23 '17 at 19:26
They can still declare their `function test()`, but they would only call it it their page had been submitted: `
` ... ``
– Lucas Krupinski Feb 23 '17 at 19:26
@Fred-ii- it's been edited for an if they WANT case. – clearshot66 Feb 23 '17 at 19:28
@clearshot66 that makes a lot more sense :-) *cheers* – Funk Forty Niner Feb 23 '17 at 19:28
I think you may want to reload this entire question with the new comments ;-) the plot thickens as it were. – Funk Forty Niner Feb 23 '17 at 19:32
Thanks for your attention. I copy and past the code and run the code. However, when I click the button, nothing is done. – Mohammad Tahaye Abadi Feb 23 '17 at 19:33
Are you running this on a server or locally @MohammadTahayeAbadi – clearshot66 Feb 23 '17 at 19:37
I am locally running it.l – Mohammad Tahaye Abadi Feb 23 '17 at 19:45
@MohammadTahayeAbadi PHP doesn't function locally it's a server side language. It has to be run on a PHP enabled server. If you want to test and run PHP code locally I'd suggest using something like this : https://www.apachefriends.org/index.html – clearshot66 Feb 23 '17 at 19:46
I installed XAMPP to make my computer as a php virtual server. I have also started Appache and MySQL on the control panel of XAMPP. – Mohammad Tahaye Abadi Feb 23 '17 at 19:56

Execute function on php

1 Answers1