File Update Using PHP Source Code

killerabgg · 2025-02-27T07:05:18+0000

In this tutorial we will create a File Update using PHP. This code can create a text file with content dynamically when user submit the form inputs. The code use PHP POST to launch a specific method that update a text using these special php functions fwrite() to rewrite an existing file and lastly fclose() safely close the connection between the opened file. This is a user-friendly kind of program feel free to modify it.

We will be using PHP as a scripting language and interpreter that is used primarily on any webserver including xamp, wamp, etc. It is being use to any famous websites and it has a modern technology that can easily be use by the next generation.

Getting Started:

First you have to download & install XAMPP or any local server that run PHP scripts. Here's the link for XAMPP server https://www.apachefriends.org/index.html.

And, this is the link for the bootstrap that i used for the layout design https://getbootstrap.com/.

Creating The Interface

This is where we will create a simple form for our application. To create the forms simply copy and write it into your text editor, then save it as index.php.

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1"/>
<link rel="stylesheet" type="text/css" href="css/bootstrap.css"/>
</head>
<body>
<nav class="navbar navbar-default">
<div class="container-fluid">
<a class="navbar-brand" href="https://sourcecodester.com">Sourcecodester</a>
</div>
</nav>
<div class="col-md-3"></div>
<div class="col-md-6 well">
<h3 class="text-primary">File Update Using PHP Source Code</h3>
<hr style="border-top:1px dotted #ccc;"/>
<div>
<div class="col-md-4">
<form method="POST" action="add_file.php">
<div class="form-group">
<label>Filename:</label>
<input type="text" name="name" class="form-control"/>
</div>
<center><button class="btn btn-primary">Create File</button></center>
</form>
</div>
<div class="col-md-8">
<table class="table table-bordered">
<thead class="alert-info">
<tr>
<th>Name</th>
<th>Action</th>
</tr>
</thead>
<tbody>
<?php
$full_path

=

"files"

;
$dir

=

opendir

(

$full_path

)

;
while

(

(

$file

=

readdir

(

$dir

)

)

!==

FALSE

)

{
if

(

$file

==

"."

||

$file

==

".."

)
continue

;
?>
<tr>
<td><?php

echo

$file

?>

</td>
<td colspan="2"><center><a class="btn btn-warning" href="edit_file.php?filename=<?php

echo

$file

?>

"><span class="glyphicon glyphicon-edit"></span> Edit</a></center></td>
</tr>
<?php
}
closedir

(

$dir

)

;
?>
</tbody>
</table>
</div>
</div>
</body>
</html>

Creating the Main Function

This code contains the main function of the application. This code will update a text file when the button is clicked. To make this just copy and write these block of codes below inside the text editor, then save it as shown below.
add_file.php

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1"/>
<link rel="stylesheet" type="text/css" href="css/bootstrap.css"/>
</head>
<body>
<nav class="navbar navbar-default">
<div class="container-fluid">
<a class="navbar-brand" href="https://sourcecodester.com">Sourcecodester</a>
</div>
</nav>
<div class="col-md-3"></div>
<div class="col-md-6 well">
<h3 class="text-primary">File Update Using PHP Source Code</h3>
<hr style="border-top:1px dotted #ccc;"/>
<?php
$path

=

"files"

;
$filename

=

$_POST

[

'name'

]

.

".txt"

;
fopen

(

$path

.

"/"

.

$filename

,

'w'

)

;
?>
<form method="POST" action="save_file.php">
<label>Enter a Text</label>
<textarea name="content" style="width:100%; height:100px; resize:none;"></textarea>
<input type="hidden" name="filename" value="<?php

echo

$filename

?>

"/>
<button type="submit" class="btn btn-primary">Save</button>
</form>
</div>
</body>
</html>

edit_file.php

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" name="viewport" content="width=device-width, initial-scale=1"/>
<link rel="stylesheet" type="text/css" href="css/bootstrap.css"/>
</head>
<body>
<nav class="navbar navbar-default">
<div class="container-fluid">
<a class="navbar-brand" href="https://sourcecodester.com">Sourcecodester</a>
</div>
</nav>
<div class="col-md-3"></div>
<div class="col-md-6 well">
<h3 class="text-primary">File Update Using PHP Source Code</h3>
<hr style="border-top:1px dotted #ccc;"/>
<?php
$file_name

=

$_GET

[

'filename'

]

;
$path

=

"files"

;
$file

=

fopen

(

$path

.

"/"

.

$file_name

,

"r"

)

;
$content

=

fread

(

$file

,

filesize

(

$path

.

"/"

.

$file_name

)

)

;
fclose

(

$file

)

;
?>
<form method="POST" action="save_file.php">
<label>Enter a Text</label>
<textarea name="content" style="width:100%; height:100px; resize:none;"><?php

echo

$content

?>

</textarea>
<input type="hidden" name="filename" value="<?php

echo

$file_name

?>

"/>
<button type="submit" class="btn btn-warning">Update</button>
</form>
</div>
</body>
</html>

save_file.php

<?php
if

(

$_POST

[

'content'

]

!=

""

)

{
$content

=

$_POST

[

'content'

]

;
$file_name

=

$_POST

[

'filename'

]

;
$path

=

"files"

;
$file

=

fopen

(

$path

.

"/"

.

$file_name

,

'w'

)

;
fwrite

(

$file

,

$content

)

;
fclose

(

$file

)

;
header

(

"location:index.php"

)

;
}

else

{
echo

"Error!"

;
echo

"<a href='index.php'>Back</a>"

;
}
?>

There you have it we successfully created File Update using PHP. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!

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