PHP File and Directory Tutorial with Assignments

This tutorial show you how to manipulate file and directory with PHP , we will learn how to create a directory, directory already existed or not, saving file in a directory you created and so on …

Directory:-

Creating a directory:
pro1.php
<?php
mkdir(“data”);
echo “Directory Created”;
?>
Question :- Write a program for create a directory . if directory available then give a message directory already exists, otherwise create. For checking the existence of directory is_dir() function is used.
pro2.php
<?php
if(is_dir(“data”))
echo “Directory already exists”;
else
{
mkdir(“data”);
echo “Directory created”;
}
?>
Question :-Write a program  to create a form with four field namely  NAME,ADDRESS,AGE,CONTACT.  Now a user will enter name, address, age, contact  then a file will create with name in data directory and all content will write in that file .
pro3.php
<?php
$nm=$_POST[‘t1’];
$add+$_POST[‘t2’];
$age=$_POST[‘t3’];
$cont=$_POST[‘t4’];
if(is_file($_POST[‘create’]))
{
if(is_file(“data/”.$nm.”.txt”))
echo “Echo file already exists”;
else
{
$fp=fopen(“data/”.$nm.”.txt”,’w’);
fwrite($fp,$nm.”\t”.$add.”\t”.$age.”\t”.$cont);
fclose($fp);
}
}
?>

<form name=”form1″ method=”post” action=””>
<table width=”227″ border=”1″ align=”center”>
<tr>
<td width=”56″>Name</td>
<td width=”155″><input type=”text” name=”t1″></td>
</tr>
<tr>
<td>Address</td>
<td><input type=”text” name=”t2″></td>
</tr>
<tr>
<td>Age</td>
<td><input type=”text” name=”t3″></td>
</tr>
<tr>
<td>Contact</td>
<td><input type=”text” name=”t4″></td>
</tr>
<tr>
<td><input name=”create” type=”submit” id=”create” value=”Create”></td>
<td>&nbsp;</td>
</tr>
</table>
</form>

Assignment 1  : This program illustrate that how to read the content of particular directory(file name). For example we will read the content (file name ) of ‘data’ directory ,
[Note:-when you create a directory, two files automatic create that is (.) and(..) ]
pro4.php
<?php
$dp=opendir(“data”);
while($file=readdir($dp))
{
if($file!=’.’&&$file!=’..’)
$file_name[]=$file;
}
foreach($file_name as $f)
{
echo $f.”<br>”;
}
?>
Assignment 2  :  Modified Version of   Assignment 1 , try to understand it.
pro5.php
<?php
$fn=$_POST[‘t1’];
$msg=$_POST[‘msg’];
$task=$_POST[‘task’];
$select=$_POST[‘select’];
if(isset($_POST[‘done’]))
{
switch($task)
{
case ‘write’:
if(file_exists(“data/”.$fn.”.txt”))
$msg=”File name already exist”;
else
{
$fp=fopen(“data/”.$fn.”.txt”,’w’);
fwrite($fp,$msg);
fclose($fp);
}
break;
case’read’:
$fp=fopen(“data/”.$select,’r’);
$msg=fread($fp,filesize(“data/”.$select));

break;
case ‘append’:
$fp=fopen(“data/”.$select,’a’);
fwrite($fp,$msg);
break;

}
}

?>

<form action=”” method=”post”>
<table width=”405″ border=”1″ align=”center”>
<tr>
<td>File Name </td>
<td><input type=”text” name=”t1″></td>
</tr>
<tr>
<td width=”125″>Existing File </td>
<td width=”264″><label>
<select name=”select”>
<?php
$dp=opendir(“data”);
while($file=readdir($dp))
{
if($file!=’.’&&$file!=’..’)
$file_name[]=$file;
}
foreach($file_name as $f)
{
echo “<option value=’$f’>$f</option>”;
}
?>
</select>
</label></td>
</tr>
<tr>
<td height=”292″>Massage</td>
<td><label>
<textarea name=”msg” rows=”12″ cols=”35″><?php echo $msg;?></textarea>
</label></td>
</tr>
<tr>
<td>Task
<label></label></td>
<td><select name=”task”>
<option value=”write”>Craete</option>
<option value=”read”>Read</option>
<option value=”append”>Append</option>
</select></td>
</tr>
<tr>
<td>&nbsp;</td>
<td><label>
<input type=”submit” name=”done” value=”DONE”>
</label></td>
</tr>
</table>
</form>