I/O PHP Files and classes

1- Open connection to a file.
2- Process R/W Operation.
3- Close Connection.
You specify the operation (read or write)
when opening a file.

 In order to read or write to a file , you
have to get the write permissions.
 Permission is something to set on the
server operating system.

 Open file function return a handle ,
represents a connection to the opened
file.
o This is called resource data type.
 fopen need to specify name and path
(Rel/Abs) of the file and red or write mode.
 Use forward slashes ”/” of both Unix &
Windows.

 Is used to write the contents of a string to
file open for writing.
o File handle is one of it`s parameters.
 Return number of characters written on
success, otherwise return false.
 Fputs() is an alias.
 R+ is the access mode of writing.

$handle=fopen($path ,’ r+ ’)
$write=fwrite( $handle , $string )
If($write){ echo “Success”}
File pointer at the end of string
// Read about access modes
Get file path dynamically if
file name = query.txt

Data is encoded using URL-encoding by default.
Data included in the http body.
The form data should be of the content type
By setting the encrypt
attribute of html form
Multipart/form-data

“Multipart/form-data”
<input type = “file” name”upload”>

Refers to an instance of a class car().
Creating an object called
Instantiation
$mycar=new car();

Difference between object and class

objects
Class
Car
-color
-model
-top-speed
Red,Volovo,
220 k/h
White,Retmo,
160 k/h
Difference between object and class

Turn Class to an object
Class name:car
$mycar=new car();

Turn Class to an object
Class name:car
Class car{
Public $color;
Public $model;
Public $top_speed;
}
$mycar=new car();
$mycar->color=‘red’
$mycar->model=‘volvo’
$color=$mycar->color;

1439938978
seconds since
Jan 01 1970. (UTC)

What is the Unix time stamp?
http://php.net/manual/en/function.time.php

I/O PHP Files and classes

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