Show files in page

ngreenwood6 · August 4, 2008

I am trying to create a backend for my website. I would like to be able to edit certain pages from my backend. I would like to know how to show the code on a page for a certain file so that I can edit the page from my site. If anyone can help it would be appreciated. If you need more info please let me know.

trq · August 4, 2008

Read the file into a variable, display that variable within a html textarea. When the form (textarea) is submitted write the contents back to the file.

ngreenwood6 · August 4, 2008

Sorry I am noob as you can tell. How can I read a file into a variable? maybe an example.

trq · August 4, 2008

Take a look at file_get_contents() and file_put_contents().

ngreenwood6 · August 4, 2008

I have come up with this code:

<?php

$fopen = fopen("index.php", "rb");
$default = fread($fopen);
?>

<html>
<title>Read Data</title>
<form name="change" method="post" action="<?php echo $PHP_SELF; ?>">
<input type="textarea" value="$default">
</form>
</html>

However, It is giving me an error "Warning: Wrong parameter count for fread() in C:\wamp\www\login\edit.php on line 4". At this point I was just trying to open the file into a text area. Also it is just displaying default in the textarea. Anyone help?

ngreenwood6 · August 4, 2008

Actually I have just come up with this:

<?php

$index = file_get_contents("index.php");


?>

<html>
<title>Read Data</title>
<form name="change" method="post" action="<?php echo $PHP_SELF; ?>">
<textarea name="textarea"  cols="100" rows="100" value="<? echo $index; ?>">
</form>
</html>

It displays my index page in the textarea. However, I do not know how I would code it to save the changes. If anyone can help it is appreciated.

dezkit · August 4, 2008

<?php
$file_name = "index.php";
$index = file_get_contents("$file_name");
if(isset($_POST['submit'])){
file_put_contents($textarea, $file_name);
echo "page has been updated.";
} else {
?>
<html>
<title>Read Data</title>
<form name="change" method="post" action="<?php echo $PHP_SELF; ?>">
<textarea name="textarea" cols="100" rows="100" value="<?php echo $index; ?>"></textarea><br>
<input type="submit" value="submit"><input type="reset" value="reset">
</form>
</html>
<?php
}
?>

i think.

trq · August 4, 2008

Firstly, $PHP_SELF has long been depricated, don't use it.

<?php

if (isset($_POST['submit'])) {
 file_put_contents('index.php', $_POST['textarea']);
} else {

$index = file_get_contents("index.php");

?>

<html>
<title>Read Data</title>
<form name="change" method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
<textarea name="textarea"  cols="100" rows="100" value="<? echo $index; ?>">
<input type="submit" name="submit">
</form>
</html>
<?php
}
?>

Be aware that this is just an example. Allowing users to write to your index.php file like that is very insecure. You really want to have all this locked behind a login system of some sort at the very least.

ngreenwood6 · August 4, 2008

Thanks for the replys. I tried both of your codes, but I am getting this in my text area:

<input type="submit" name="submit">
</form>
</html>

And it is not showing the submit button.

dezkit · August 4, 2008

you missed a </textarea>

but this still doesn't work for me though. any ideas? maybe its my server?

@ngreen

<?php

if (isset($_POST['submit'])) {
  file_put_contents('index.php', $_POST['textarea']);
} else {

$index = file_get_contents("index.php");

?>

<html>
<title>Read Data</title>
<form name="change" method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
<textarea name="textarea"  cols="100" rows="100" value="<? echo $index; ?>"></textarea>
<input type="submit" name="submit">
</form>
</html>
<?php
}
?>

is the correct code

ngreenwood6 · August 4, 2008

I test it on just a text file and it posted it but it did not show it in the textarea.

trq · August 4, 2008

<textarea name="textarea"  cols="100" rows="100" value="<?php echo $index; ?>"></textarea>

dezkit · August 4, 2008

i dont know then, you gotta use a mysql database then bro

ngreenwood6 · August 4, 2008

I have that code in there but it is still not showing the file in the text area, but if I input data to the field it puts it into the text file. Any suggestions?

ngreenwood6 · August 4, 2008

actually it works with a file ending in .php but with the file ending in .txt it isn't working. Anyone have any idea why not?

trq · August 4, 2008

Sorry, should have picked this up. There is no such thing as a value attribute for a textarea. You'll also want to use htmlentities().

<?php

if (isset($_POST['submit'])) {
 file_put_contents('index.php', $_POST['textarea']);
} else {

$index = file_get_contents("index.php");

?>

<html>
<title>Read Data</title>
<form name="change" method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
<textarea name="textarea"  cols="100" rows="100"><?php echo htmlentities($index); ?></textarea>
<input type="submit" name="submit">
</form>
</html>
<?php
}
?>

dezkit · August 4, 2008

@thorpe

it doesnt save :/

trq · August 4, 2008

Put this at the top.

<?php error_reporting(E_ALL); ini_set('display_errors','1'); ?>

You likely have permissions issues.

dezkit · August 4, 2008

it says

Fatal error: Call to undefined function: file_put_contents() in /update.php on line 6

trq · August 4, 2008

What version of php are you using?

dezkit · August 4, 2008

PHP Version 4.3.11

DarkWater · August 4, 2008

I'd seriously suggest upgrading to PHP 5.

trq · August 4, 2008

Theres your problem, your using an out of date version. You'll need to use fopen() and fwrite(0 though Id also upgrade to the current version of php. (5.2.6 I believe).

dezkit · August 4, 2008

darn, are there any really cheap and very good hosting companies that support the latest php versions? at the moment i am using yahoo smallbusiness (bad)

ngreenwood6 · August 4, 2008

Thanks this works for me. Now I have another quick question. After it is submitted I would like for it to go back to the same page but show it with the updated information. Is this the correct code?

<?php

if (isset($_POST['submit'])) {
 file_put_contents('test.php', $_POST['textarea']);
 echo "<a href='edit.php'>Go Back</a>";
} else {

$index = file_get_contents("test.php");

?>

<html>
<title>Read Data</title>
<form name="change" method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
<textarea name="textarea"  cols="80" rows="20"><?php echo htmlentities($index); ?></textarea>
<input type="submit" name="submit">
</form>
</html>
<?php
}
?>

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